Rolex Science: Spareparts (2)

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09RolexCvrR3 9/3/09 8:57 AM Page 2

A message from General Manager MW Industries serves
Ways to contact
You can always rely on Rolex Spring... market leaders in
Rolex Spring... Steven C. Krajewski industries such as…

Mail Dear Rolex Spring Customer, Rolex Spring is a
leading manufacturer Agricultural
We at Rolex Spring are proud to introduce our 2009 Catalog, of disc springs with
our first completely re-designed catalog in a very long time! It is an extensive
Automotive
just one of the many exciting changes we have made her e, all inventory and custom
of which are intended to help us better serve you. manufacturing
8900 Kelso Drive capabilities. For forty Auto Racing
Baltimore, MD 21221 We have relocated our production facility to our sister
years Rolex Spring
division, Maryland Precision Spring in Baltimore, Maryland,
has been serving such industries as aviation/aer ospace,
and have used this move as an opportunity to invest in new
transportation, machining and construction and many mor e. Aviation
PHONE production and heat treating equipment. Applying the Aerospace
principles of Lean Manufacturing and Six Sigma, we have
Rolex Spring provides:
also streamlined and optimized our manufacturing pr ocesses
across the board. s Large disc spring inventory Computers
Since our founding in 1969, you can continue to r ely on Rolex s Custom manufacturing
Spring for— Electrical
410-391-7400
s Exacting quality standards and certifications
s Rolex Spring is just as committed to quality today as we s Metric and standard sizes
were in 1996 when we were the first disc spring Energy
manufacturer to achieve QS and ISO certifications. s ODs from 1/4" to 40"
FAX
s We offer design and engineering support – fr om drawing s Outstanding customer service and technical support Hand and Power
board to installation – for your applications. Tools
Rolex Spring is proud to be a part of Maryland Pr ecision
s Our manufacturing expertise enables us to work in all Spring. Both businesses are members of the MW Industries
grades and types of steel, in addition to specialty family of companies. Heavy Trucks
metals.
410-687-9223
s We provide assembly and packaging services, including
Transportation
stacking, to meet your needs.
WEB s We are not limited to the pr oducts you see in this
catalog! We can custom manufacture to your
Medical
requirements and can match other manufactur ers’
standard designs as well.
Terms: Maryland residents add 6%
Off-Road
We think you will be impr essed with our new catalog! You can or appropriate tax for your district. Machinery
also visit us online at www.mw-ind.com/rolex. We are proud Prices are subject to change without
mw-ind.com/rolex notice; FOB, Baltimore, M D.
of our past, but equally excited about our futur e. Speaking for Outdoor Power
all of us at Rolex Spring, we would like to thank you for your
support and we look forward to serving you! All damage claims must be filed by Equipment
EMAIL consignee within 30 days of receipt.
Retail Products
We accept:
Display Fixtures

Steve Krajewski Telecommunications
rolexspring@mw-ind.com General Manager

09RolexCatalogR3 9/4/09 11:30 AM Page 1

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TABLE OF CONTENTS

About Rolex Products & Services ...............2-3 NDS Series ..............................................21-22

Standard Springs ............................................3 AK Series Lookup Tables ..............................23

Spring Measurement & Function ....................4 AK Series (MM & KGF) ............................24-25

AM Series Tolerances .....................................5 AK Series (Inches & Pounds) ...................25-26

AM Series (MM & Newtons).........................6-9 Disc Spring Applications .........................27-28

AM Series (Inches & Pounds) ..................10-13 Design Info: Characteristics ..........................29

AI & AK Series Tolerances.............................14 Design Info: Load Calculations .....................30

AI Series...................................................15-16 Design Info: Loading & Fatigue ...............31-32

SP Series.......................................................17 Design Info: Stacks .......................................33

Contact Belleville Springs .............................18 Design Info: Disc Spring Properties..............34

Contact Belleville Springs - Military ..............19 Design Info: Tightening Torque .....................35

FL Series .......................................................20 Request For Quote........................................36

WARRANTY

Maryland Precision Spring Division, the manufactur ers be liable for loss of use of a pur chaser’s equipment or
of ROLEX Precision Disc Springs, sells these products facilities, or for loss of business, goodwill or pr ofits, or
on the condition that the purchaser will make their own for costs of inspection, transportation, storage, or any
determination as to the pr oducts’ suitability for their other incidental damages. Pur chaser must notify
intended use. The pur chaser agr ees to this and Maryland Pr ecision Spring Division in writing of any
accepts all r esponsibility for the use of ROLEX products considered defective within 30 days of r eceipt
Precision Disc Springs. of products.

Maryland Pr ecision Spring Division warrants that Maryland Pr ecision Spring disclaims any and all
ROLEX Springs ar e fr ee fr om defects in material and expressed or implied warranties concer ning ROLEX
workmanship. Our sole obligation for any br each of this Precision Disc Springs including, without limitation,
warranty is the r epair or r eplacement of the pr oduct, at warranty of fitness for a specific purpose and warranty of
our option. Maryland Precision Spring Division shall not merchantability, except the warranty set forth above.

Note: Part numbers and dimensions throughout this ca talog are subject to manufacturer’s change without notice.

Can’t find the part required for your application? No problem! Call Rolex Spring at 410-391-7400
and speak to a Sales Associate regarding our custom manufacturing capabilities.

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ABOUT ROLEX

MPS/ROLEX SPRING
Manufacturing precision disc springs since 1969.

OUR PRODUCTS
s MPS/Rolex Spring makes Belleville springs and disc s We have complete contr ol over all aspects of the
springs fr om a variety of materials in sizes ranging manufacturing pr ocess. Our plant in Baltimor e, MD
from 1/4" OD to 40" OD. includes tooling, stamping, machining, heat tr eating
and finishing capabilities.
s We stock a number of “catalog” parts or can make
parts to your design specifications. s We have experience making parts fr om many
specialty materials.
s Our pr oducts ar e suitable for obtaining high spring
loads in limited space. s We ar e well suited to supply custom engineer ed
springs for all of your applications.
s We make parts for use with pr etensioning bolted
connections, for shock absorption, for vibration
dampening, for friction devices, for live loading ball OUR SERVICES
bearings, and many other design applications. s Complete design and engineering support.

s Our parts are used in the Aerospace, Transportation, s Fast shipment of product from our extensive catalog
Material Handling, Chemical Pr ocessing Equipment, part inventory.
Mining and Oil Field Equipment, Machine T ool, s Complete manufacturing support for custom parts.
Electrical Connector , V alve and many other
industries. s Stocking programs for “just in time” deliveries.
s Assembly and packaging services, including stacking.
OUR QUALIFICATIONS
s MPS/Rolex Spring is a leader in the design and s Quality control system support including certification,
manufacture of disc springs. W e have a history material traceability, PPAP, etc.
dating back to 1969.
s We wer e the first disc spring manufactur er in the
world to hold an ISO 9001 Quality System
Certification. We currently maintain our registration to We are not limited to manufacturing springs listed in this
ISO 9001:2000. catalog. W e have the knowledge, experience, and
capability to produce springs to fit most any application.
s We employee proprietary computer design programs Please contact our Sales Department for help with your
to evaluate spring parameters to insur e acceptable custom applications.
performance of our products in customer applications.


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ADDITIONAL SERVICES OFFERED BY MPS/ROLEX SPRING

COMPLETE DISC SPRING ASSEMBLIES MADE PRE-STACKED PACKAGED DISC SPRINGS
TO YOUR SPECIFICATIONS OR ASSEMBLED s Pre-stacked. pre-arranged assemblies
TO COMPONENTS SUPPLIED BY YOU s Parallel and series combinations
s Captive disc spring arrangements s Eliminate errors and labor caused
s Guide rods, end restraints by manual stacking
s Springs are stacked at our facility s Easy to handle, quick to install
s Exact positioning and performance
are factory tested on the pr emises

Stack Spring Tension Device

Typical Stack Assembly

STANDARD SPRINGS
Load Damping Spring Assembly Computer Spindle Drive Assembly

Standard Springs

s AM Series are precision springs geared to the metric s FL (inch) and MFL (metric) series flange springs ar e
community and manufactured utilizing DIN 2092 and primarily designed for pipe flange applications. They
DIN 2093 as guidelines. AM series springs ar e are intended to deflect and move with the bolted
designed to meet high performance r equirements of joint in the event of thermal and/or mechanical
dynamic spring applications. They ar e typically shock. Applications include piping construction,
manufactured from High Carbon or Alloy steel; AISI compression joints, steam piping joints, valve and
C1075 or 6150 material. pump connections, and other similar applications.
The FL and MFL series ar e normally manufactur ed
s AI Series springs ar e designed to maintain load from 17/7 PH stainless steel.
tension in light bolted assemblies, wher e a constant
load is r equired. Although this series is primarily s NDS Series flange springs ar e used to fill the
designed for bolted applications, they may also be application needs similar to those described for the
used in dynamic applications as long as the FL and MFL series springs. However , they ar e
application does not exceed the designated str ess primarily designed to handle applications
limits. Like the AM series the AI parts ar e typically demanding much higher load and/or temperatur e.
manufactured from High Carbon or Alloy steel; AISI NDS parts ar e normally made fr om H11/H13 steel
C1075 or 6150 material. and can pr oduce flat loads up to 310,000 pounds
and, under most conditions, can withstand
s SP Series are specifically designed for heavy bolted temperatures up of 1100° F (500° C).
applications such as those r equired for bus bar and
transformer applications. They ar e used wher ever s AK Series springs ar e specifically designed as
there is a need to over come the ef fects of thermal preloading springs for use with radial ball bearings.
expansion and contraction. The SP series ar e They ar e made fr om C1075 material and ar e
normally manufactur ed fr om High Carbon or Alloy intended to maintain the positioning accuracy of the
steel; AISI C1075 or 6150 material. bearing with no endplay and minimize vibration and
shaft deflection. AK series springs ar e intended to
meet both Metric and Inch standar d sizes.


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BASIC INFORMATION FOR MEASUREMENT
AND FUNCTION OF A DISC SPRING

CONICAL SPRING NOMENCLATURE OF A CONICAL SPRING
OD = Outside Diameter
ID = Inside Diameter
t or TH = Thickness
OH = Overall Height
h or d = Cone or Dish Height

3 SPRINGS IN PARALLEL PARALLEL SPRING STACK
Springs in parallel incr ease the potential for ce by the
number of springs being used.

3 springs in parallel = 3 x the for ce of one

If one spring can develop 100 pounds of clamping force, degree of accuracy because friction will cause risers in
3 in parallel can develop 300 pounds of clamping for ce. loads during the compr ession phase and dips in loads
during the r eleasing phase. These ar e caused by a
The potential to develop a high coef ficient of friction surface friction grabbing ef fect that pr events the
exists in a parallel stack due to the friction that is cr ated
e surfaces moving smoothly acr oss each other. The effect
on the surface contacts. Stacks larger than three tend to tends to be pr esent in both the compr ession and
develop a high, unpr edictable, coef ficient of friction. A releasing cycles.
stack lar ger then thr ee can not be pr edicted with any

6 SPRINGS IN SERIES If one spring can develop 100 pounds of clamping for ce
at 75% of its travel height, then 6 (or mor e) springs will
produce the same 100 pounds for ce at 75% of the total
travel distance of the stack.
If a single spring, at .020" travel, is 75% deflection and
develops 100 pounds of for ce, then a series stack of 6
will need to travel 6 times the deflection distance or
.120", 75% of the stack travel height, to pr oduce the
same 100 pounds of force. The formula is:
Stack height = Single spring height x the number of
springs in the stack.
SPRING INFO

Unlike the parallel stack, the coef ficient of friction plays
less a roll in a series stack. However, larger series stacks
made of numbers gr eater than ten, tend to develop an
SERIES SPRING STACK
unpredictable coef ficient of friction ar ound the contact
Springs stacked in series increase the travel of the spring
edges that make it dif ficult to pr edict the accuracy of
by the number of springs in the stack while r etaining the
load points. These tend to be identified as sticking points
potential force of only one across the span of the stack.
and can pr oduce a gripping or popping sound as the
Example: 6 springs in series will allow the springs to stack moves through the compression cycle. Numerous
travel 6 times the distance of a single spring while preventive measures such as lubricants, a lar ger radius
retaining the potential force of only one. or bearing flats may be specified to aid in r educing
these effects.


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AM/SAM SERIES PRECISION SPRING TOLERANCES

The tolerances on this page are for the AM (AISI 1075 or AISI 6150 carbon steel)
and SAM (17/7 PH stainless steel) series parts. THICKNESS (t) TOLERANCE

TOLERANCES
Refer to the “SAM” columns for dimensional and/or tolerance differences Carbon Steel AISI C1075 or AISI 6150
required for ALL 17/7 PH stainless steel parts. AM Series (MM) AM Series (Inches)
Range Tolerance Range Tolerance
ALL stainless steel ma terials will utilize these SAM specifica tions with the
exception of materials not a vailable in the standard tolerance range. In those < 0.70 - 0.025 < 0.0276 ± 0.001
cases, the closest material tolerance will be used. > = 0.70 > = 0.0276
± 0.051 ± 0.002
< 2.25 < 0.088
When requesting parts made of stainless steel, add the letter “S” in front of the > = 2.25 > = 0.088
existing part number . For example, carbon steel part number AM-502520 ± 0.076 ± 0.003
< 3.00 < 0.118
becomes SAM-502520 for stainless steel. > = 3.00 > = 0.118
± 0.102 ± 0.004
< 4.00 < 0.157
For a vailability of other ma terial types and achievable tolerances, please call
> = 4.00 ± 0.127 > = 0.157 ± 0.005
Rolex Sales or Engineering for assistance.
Design Note : stainless steel ma terial thickness is different than steel and is
subject to commercial availability. The overall height will be used to compensate
for the difference in load due to the difference in thickness.
THICKNESS (t) TOLERANCE
17/7 PH Stainless Steel
OUTSIDE & INSIDE DIAMETER TOLERANCE SAM Series (MM) SAM Series (Inches)
AM Series (MM) SAM (MM) AM SERIES (Inches) SAM (Inches)
Carbon Steel Stainless Carbon Steel Stainless < = 0.51 ± 0.05 < = 0.020 ± 0.002
> 0.51 > 0.020
Range Tolerance Tolerance Range Tolerance Tolerance ± 0.08 ± 0.003
< = 1.27 < = 0.050
ID + 0.102 ID + 0.13 ID + 0.004 ID + 0.005 > 1.27 > 0.050
< = 3.0 < = 0.118 ± 0.10 ± 0.004
OD - 0.102 OD - 0.13 OD - 0.004 OD - 0.005 < = 2.34 < = 0.092
> 3.0 ID + 0.127 ID + 0.15 > 0.118 ID + 0.005 ID + 0.006 > 2.34 > 0.092
± 0.13 ± 0.005
< = 6.0 OD - 0.127 OD - 0.15 < = 0.236 OD - 0.005 OD - 0.006 < = 3.18 < = 0.125
> 6.0 ID + 0.152 ID + 0.18 > 0.236 ID + 0.006 ID + 0.007 > 3.18 > 0.125
± 0.20 ± 0.008
< = 10.0 OD - 0.152 OD - 0.18 < = 0.394 OD - 0.006 OD - 0.007 < = 4.95 < = 0.195
> 10.0 ID + 0.178 ID + 0.20 > 0.394 ID + 0.007 ID + 0.008 > 4.95 ± 0.25 > 0.195 ± 0.010
< = 18.0 OD - 0.178 OD - 0.20 < = 0.709 OD - 0.007 OD - 0.008
> 18.0 ID + 0.203 ID + 0.23 > 0.709 ID + 0.008 ID + 0.009
< = 30.0 OD - 0.203 OD - 0.23 < = 1.180 OD - 0.008 OD - 0.009
> 30.0 ID + 0.254 ID + 0.28 > 1.180 ID + 0.010 ID + 0.011
< = 50.0 OD - 0.254 OD - 0.28 < = 1.970 OD - 0.010 OD - 0.011 OPERATION LOAD TOLERANCE
> 50.0 ID + 0.305 ID + 0.33 > 1.970 ID + 0.012 ID + 0.013
< = 80.0 OD - 0.305 OD - 0.33 < = 3.150 OD - 0.012 OD - 0.013 Thickness Range AM SAM
> 80.0 ID + 0.356 ID + 0.38 > 3.150 ID + 0.014 ID + 0.015 MM Inches Series Series
< = 120 OD - 0.356 OD - 0.38 < = 4.720 OD - 0.014 OD - 0.015 + 25.0%
> 120 ID + 0.406 ID + 0.43 > 4.720 ID + 0.016 ID + 0.017 < = 1.25 < = .049 ± 20%
- 7.5%
< = 180 OD - 0.406 OD - 0.43 < = 7.090 OD - 0.016 OD - 0.017 > 1.25 > .049 + 15.0%
ID + 0.457 ID + 0.48 ID + 0.018 ID + 0.019 ± 20%
> 180 > 7.090 < = 3.00 < = .118 - 7.5%
OD - 0.457 OD - 0.48 OD - 0.018 OD - 0.019 > 3.00 > .118 + 10.0%
± 20%
< = 6.00 < = .236 - 5.0%
+ 5.0%
OVERALL HEIGHT TOLERANCE > 6.00 > .236 ± 20%
- 5.0%
AM Series (MM) SAM (MM) AM Series (Inches) SAM (Inches)
by part thickness Stainless by part thickness Stainless
t Range OH Tol. OH Tol. t Range OH Tol. OH Tol.
+ 0.10 + 0.11 + .004 + 0.0045
< = 1.25 < = .049 HARDNESS TOLERANCE
- 0.05 - 0.06 - .002 - 0.0025
> 1.25 + 0.15 + 0.17 > .049 + .006 + 0.0065 AM Series Tolerance SAM
<= 2.00 - 0.08 - 0.09 < = .078 - .003 - 0.0035 Thickness Range Rockwell Stainless
> 2.00 + 0.30 + 0.32 > .078 + .012 + 0.0125
MM Inches HRc HRc
<= 3.00 - 0.10 - 0.11 < = .118 - .004 - 0.0045
> 3.00 + 0.30 + 0.32 > .118 + .012 + 0.0125 < 1.00 < 0.039 46 - 51 Minimum 38
<= 6.00 - 0.15 - 0.17 < = .236 - .006 - 0.0065 > = 1.00 > = 0.039
44 - 49 Minimum 38
+ 0.30 + 0.32 + .012 + 0.0125 < 4.25 < 0.157
> 6.00 > .236 > = 4.25 > = 0.157 42 - 48 Minimum 38
- 0.30 - 0.32 - .012 - 0.0125

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AM/SAM SERIES in MM and NEWTONS
RECOMMENDED OPERATIONAL LOAD LIMITS
ROLEX
PART DIMENSIONS (MM) MINIMUM MAXIMUM
NUMBER Load Deflection Load Deflection
OD ID t h OH h/t (Newtons) (f) % (Newtons) (f) %
AM-63203 6.000 3.200 0.300 0.200 0.400 0.667 89 0.076 50% 129 0.114 75%
AM-83202 8.001 3.200 0.201 0.198 0.399 0.987 21 0.099 50% 31 0.198 100%
AM-83203 8.001 3.200 0.300 0.251 0.549 0.838 85 0.124 50% 125 0.226 90%
AM-83204 8.001 3.200 0.399 0.203 0.599 0.510 102 0.071 35% 187 0.127 63%
AM-84202 8.001 4.191 0.201 0.251 0.450 1.252 36 0.124 50% 44 0.251 100%
AM-84203 8.001 4.191 0.300 0.251 0.549 0.839 95 0.127 51% 120 0.175 70%
AM-84204 8.001 4.191 0.399 0.203 0.599 0.510 159 0.102 50% 227 0.152 75%
AM-103203 10.008 3.200 0.300 0.353 0.650 1.178 87 0.175 50% 115 0.353 100%
AM-103204 10.008 3.200 0.399 0.305 0.701 0.764 144 0.152 50% 202 0.244 80%
AM-103205 10.008 3.200 0.500 0.251 0.749 0.502 173 0.102 40% 265 0.163 65%
AM-104204 10.008 4.191 0.399 0.305 0.701 0.764 151 0.152 50% 230 0.274 90%
AM-104205 10.008 4.191 0.500 0.251 0.749 0.502 221 0.124 50% 315 0.188 75%
AM-105225 10.008 5.207 0.249 0.305 0.551 1.224 51 0.152 50% 65 0.305 100%
AM-105204 10.008 5.207 0.399 0.305 0.701 0.764 168 0.152 50% 215 0.213 70%
AM-105205 10.008 5.207 0.500 0.251 0.749 0.503 246 0.127 51% 350 0.188 75%
AM-124204 11.989 4.191 0.399 0.404 0.800 1.013 151 0.201 50% 219 0.404 100%
AM-124205 11.989 4.191 0.500 0.353 0.851 0.706 225 0.175 50% 321 0.282 80%
AM-124206 11.989 4.191 0.599 0.404 1.001 0.674 369 0.163 40% 513 0.244 60%
AM-125205 11.989 5.207 0.500 0.401 0.899 0.802 283 0.201 50% 359 0.282 70%
AM-125206 11.989 5.207 0.599 0.353 0.950 0.589 394 0.178 50% 520 0.249 71%
AM-126205 11.989 6.198 0.500 0.356 0.851 0.711 259 0.178 50% 353 0.267 75%
AM-126206 11.989 6.198 0.599 0.356 0.950 0.593 356 0.142 40% 502 0.213 60%
AM-135205 12.497 5.207 0.500 0.353 0.851 0.706 214 0.175 50% 334 0.318 90%
AM-136235 12.497 6.198 0.351 0.452 0.800 1.290 138 0.226 50% 161 0.340 75%
AM SERIES

AM-136205 12.497 6.198 0.500 0.353 0.851 0.706 231 0.178 50% 360 0.318 90%
AM-136207 12.497 6.198 0.701 0.302 1.001 0.431 454 0.137 45% 637 0.198 66%
mm & newtons

AM-147235 13.995 7.188 0.351 0.452 0.800 1.290 112 0.226 50% 137 0.452 100%
AM-147205 13.995 7.188 0.500 0.401 0.899 0.802 223 0.201 50% 334 0.363 91%
AM-147208 13.995 7.188 0.800 0.302 1.100 0.378 594 0.152 50% 811 0.213 71%
AM-155204 15.011 5.207 0.399 0.554 0.950 1.389 164 0.277 50% 190 0.554 100%
AM-155205 15.011 5.207 0.500 0.503 1.001 1.005 236 0.251 50% 342 0.503 100%
AM-155206 15.011 5.207 0.599 0.452 1.049 0.754 325 0.226 50% 476 0.384 85%
AM-155207 15.011 5.207 0.701 0.401 1.100 0.572 427 0.201 50% 569 0.282 70%
AM-156205 15.011 6.198 0.500 0.503 1.001 1.005 245 0.251 50% 347 0.478 95%
AM-156206 15.011 6.198 0.599 0.452 1.049 0.754 334 0.226 50% 512 0.406 90%
AM-156207 15.011 6.198 0.701 0.401 1.100 0.572 445 0.201 50% 623 0.302 75%
AM-158207 15.011 8.204 0.701 0.404 1.100 0.576 516 0.203 50% 681 0.282 70%
AM-158208 15.011 8.204 0.800 0.404 1.199 0.505 685 0.183 45% 943 0.264 65%
AM-168204 16.002 8.204 0.399 0.503 0.899 1.261 138 0.251 50% 173 0.503 100%
AM-168206 16.002 8.204 0.599 0.455 1.049 0.758 325 0.226 50% 498 0.409 90%
AM-168207 16.002 8.204 0.701 0.455 1.151 0.649 503 0.229 50% 689 0.340 75%
AM-168208 16.002 8.204 0.800 0.404 1.199 0.505 623 0.201 50% 890 0.302 75%
AM-168209 16.002 8.204 0.899 0.356 1.250 0.395 756 0.178 50% 1032 0.249 70%
AM-186204 18.009 6.198 0.399 0.605 1.001 1.516 133 0.302 50% 147 0.483 80%
AM-186205 18.009 6.198 0.500 0.602 1.100 1.203 218 0.302 50% 285 0.602 100%
AM-186206 18.009 6.198 0.599 0.602 1.199 1.004 338 0.302 50% 489 0.602 100%
AM-186207 18.009 6.198 0.701 0.551 1.250 0.786 445 0.277 50% 649 0.470 85%
AM-186208 18.009 6.198 0.800 0.503 1.300 0.629 560 0.251 50% 783 0.378 75%
AM-188205 18.009 8.204 0.500 0.605 1.100 1.208 236 0.302 50% 302 0.605 100%
AM-188207 18.009 8.204 0.701 0.554 1.250 0.790 480 0.277 50% 698 0.470 85%
AM-188208 18.009 8.204 0.800 0.505 1.300 0.632 605 0.251 50% 885 0.404 80%
AM-188210 18.009 8.204 1.001 0.401 1.400 0.401 885 0.201 50% 1205 0.282 70%
AM-189245 18.009 9.195 0.450 0.605 1.049 1.345 196 0.302 50% 231 0.574 95%
AM-189207 18.009 9.195 0.701 0.503 1.199 0.717 445 0.251 50% 694 0.452 90%
AM-189210 18.009 9.195 1.001 0.404 1.400 0.404 939 0.201 50% 1281 0.282 70%
AM-208206 19.990 8.204 0.599 0.706 1.300 1.178 365 0.353 50% 471 0.671 95%
AM-208207 19.990 8.204 0.701 0.653 1.349 0.931 476 0.325 50% 694 0.620 95%
AM-208208 19.990 8.204 0.800 0.605 1.400 0.756 596 0.302 50% 916 0.544 90%
AM-208209 19.990 8.204 0.899 0.556 1.450 0.619 738 0.277 50% 1081 0.445 80%
AM-208210 19.990 8.204 1.001 0.554 1.549 0.553 996 0.277 50% 1330 0.389 70%


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ROLEX RECOMMENDED OPERATIONAL LOAD LIMITS
AM-201005 19.990 10.211 0.500 0.655 1.151 1.310 231 0.328 50% 285 0.655 100%
AM-201008 19.990 10.211 0.800 0.554 1.349 0.692 587 0.277 50% 881 0.470 85%
AM-201009 19.990 10.211 0.899 0.556 1.450 0.619 818 0.279 50% 1134 0.419 75%
AM-201010 19.990 10.211 1.001 0.556 1.549 0.556 1103 0.277 50% 1468 0.389 70%
AM-201011 19.990 10.211 1.100 0.455 1.549 0.413 1139 0.229 50% 1552 0.318 70%
AM-201013 19.990 10.211 1.250 0.508 1.750 0.407 1352 0.178 35% 2059 0.279 55%
AM-201015 19.990 10.211 1.501 0.302 1.801 0.201 1868 0.152 50% 2598 0.211 70%
AM-221106 22.504 11.201 0.599 0.805 1.400 1.343 391 0.404 50% 454 0.645 80%
AM-221108 22.504 11.201 0.800 0.655 1.450 0.819 569 0.328 50% 881 0.622 95%
AM-221113 22.504 11.201 1.250 0.505 1.750 0.404 1441 0.254 50% 2010 0.353 70%
AM-238207 23.012 8.204 0.701 0.805 1.501 1.149 480 0.401 50% 641 0.805 100%
AM-238208 23.012 8.204 0.800 0.754 1.549 0.943 596 0.376 50% 872 0.716 95%
AM-238209 23.012 8.204 0.899 0.706 1.600 0.785 738 0.353 50% 1072 0.599 85%
AM-238210 23.012 8.204 1.001 0.704 1.699 0.703 983 0.351 50% 1339 0.528 75%
AM-231009 23.012 10.211 0.899 0.759 1.651 0.845 863 0.378 50% 1134 0.569 75%
AM-231010 23.012 10.211 1.001 0.706 1.699 0.706 1041 0.353 50% 1490 0.564 80%
AM-231013 23.012 10.211 1.250 0.658 1.900 0.526 1615 0.295 45% 2224 0.427 65%
AM-231210 23.012 12.192 1.001 0.607 1.600 0.607 939 0.302 50% 1450 0.516 85%
AM-231213 23.012 12.192 1.250 0.607 1.849 0.486 1615 0.274 45% 2237 0.396 65%
AM-231215 23.012 12.192 1.501 0.505 1.999 0.337 1997 0.203 40% 2936 0.302 60%
AM-251010 24.994 10.211 1.001 0.754 1.750 0.754 939 0.378 50% 1379 0.643 85%
AM-251207 24.994 12.192 0.701 0.907 1.600 1.293 552 0.452 50% 641 0.681 75%
AM-251209 24.994 12.192 0.899 0.706 1.600 0.785 689 0.353 50% 1116 0.706 100%
AM-251210 24.994 12.192 1.001 0.808 1.801 0.807 1108 0.404 50% 1401 0.566 70%

AM SERIES
AM-251213 24.994 12.192 1.250 0.709 1.951 0.567 1712 0.356 50% 2273 0.495 70%
AM-251215 24.994 12.192 1.501 0.554 2.050 0.369 1984 0.249 45% 2798 0.361 65%

mm & newtons
AM-281008 27.940 10.211 0.800 0.955 1.750 1.194 592 0.478 50% 770 0.955 100%
AM-281010 27.940 10.211 1.001 0.904 1.900 0.904 939 0.452 50% 1397 0.859 95%
AM-281013 27.940 10.211 1.250 0.805 2.050 0.644 1450 0.404 50% 2006 0.605 75%
AM-281015 27.940 10.211 1.501 0.704 2.250 0.469 2055 0.318 45% 2647 0.452 64%
AM-281210 27.940 12.192 1.001 0.958 1.951 0.957 1072 0.480 50% 1419 0.767 80%
AM-281213 27.940 12.192 1.250 0.859 2.101 0.687 1650 0.429 50% 2371 0.686 80%
AM-281215 27.940 12.192 1.501 0.757 2.250 0.504 2153 0.340 45% 2976 0.493 65%
AM-281408 27.940 14.199 0.800 1.011 1.801 1.263 729 0.505 50% 841 0.706 70%
AM-281410 27.940 14.199 1.001 0.808 1.801 0.807 898 0.404 50% 1343 0.726 90%
AM-281413 27.940 14.199 1.250 0.861 2.101 0.689 1637 0.389 45% 2188 0.559 65%
AM-281415 27.940 14.199 1.501 0.655 2.149 0.437 2148 0.328 50% 2913 0.460 70%
AM-321210 31.496 12.192 1.001 1.107 2.101 1.107 1019 0.554 50% 1370 1.052 95%
AM-321213 31.496 12.192 1.250 0.958 2.200 0.766 1441 0.478 50% 2108 0.813 85%
AM-321215 31.496 12.192 1.501 0.853 2.350 0.569 2068 0.427 50% 2905 0.640 75%
AM-321608 31.496 16.307 0.800 1.057 1.849 1.321 627 0.528 50% 747 0.953 90%
AM-321613 31.496 16.307 1.250 0.909 2.149 0.728 1512 0.455 50% 2144 0.726 80%
AM-321615 31.496 16.307 1.501 0.912 2.400 0.607 2304 0.409 45% 3131 0.592 65%
AM-321618 31.496 16.307 1.753 0.706 2.451 0.403 2913 0.353 50% 3968 0.495 70%
AM-321620 31.496 16.307 1.999 0.762 2.751 0.381 3799 0.305 40% 5547 0.457 60%
AM-341210 34.036 12.192 1.001 1.257 2.250 1.256 1063 0.627 50% 1321 1.194 95%
AM-341213 34.036 12.192 1.250 1.107 2.350 0.886 1490 0.554 50% 2162 0.996 90%
AM-341215 34.036 12.192 1.501 1.006 2.499 0.670 2131 0.503 50% 2927 0.754 75%
AM-341413 34.036 14.300 1.250 1.161 2.400 0.929 1655 0.579 50% 2206 0.927 80%
AM-341415 34.036 14.300 1.501 1.059 2.550 0.706 2366 0.528 50% 3380 0.846 80%
AM-341615 34.036 16.307 1.501 1.059 2.550 0.706 2500 0.531 50% 3234 0.742 70%
AM-341620 34.036 16.307 1.999 0.861 2.850 0.431 3558 0.345 40% 5155 0.516 60%
AM-361809 35.560 18.288 0.899 1.158 2.050 1.288 747 0.579 50% 921 1.158 100%
AM-361813 35.560 18.288 1.250 1.011 2.250 0.809 1357 0.505 50% 2104 0.960 95%
AM-361820 35.560 18.288 1.999 0.810 2.799 0.405 3870 0.404 50% 5266 0.566 70%
AM-401413 39.878 14.300 1.250 1.407 2.649 1.126 1566 0.704 50% 2122 1.407 100%
AM-401415 39.878 14.300 1.501 1.257 2.751 0.838 2091 0.627 50% 3091 1.130 90%
AM-401420 39.878 14.300 1.999 1.059 3.051 0.530 3345 0.478 45% 4604 0.688 65%
AM-401615 39.878 21.387 1.501 1.308 2.799 0.871 2415 0.592 45% 3105 0.853 65%
AM-401620 39.878 16.307 1.999 1.110 3.099 0.555 3994 0.554 50% 5315 0.777 70%


7


410-391-7400
Fax 410-687-9223

ROLEX
AM-401820 39.878 18.288 1.999 1.163 3.150 0.582 4408 0.582 50% 5840 0.815 70%
AM-402010 39.878 20.396 1.001 1.311 2.301 1.310 934 0.655 50% 1139 1.311 100%
AM-402015 39.878 20.396 1.501 1.158 2.649 0.772 2108 0.579 50% 3082 0.986 85%
AM-402020 39.878 20.396 1.999 1.115 3.099 0.558 4426 0.556 50% 5885 0.780 70%
AM-402023 39.878 20.396 2.250 0.909 3.150 0.404 4919 0.455 50% 6699 0.638 70%
AM-402025 39.878 20.396 2.499 0.963 3.449 0.385 5800 0.386 40% 8460 0.579 60%
AM-452213 44.958 22.403 1.250 1.613 2.850 1.291 1726 0.808 50% 2010 1.209 75%
AM-452218 44.958 22.403 1.750 1.313 3.051 0.750 2905 0.655 50% 4270 1.115 85%
AM-452225 44.958 22.403 2.499 1.011 3.500 0.404 5787 0.505 50% 7877 0.709 70%
AM-501813 50.038 18.390 1.250 1.608 2.850 1.287 1241 0.803 50% 1530 1.608 100%
AM-501815 50.038 18.390 1.501 1.808 3.299 1.205 2326 0.904 50% 3011 1.808 100%
AM-501820 50.038 18.390 1.999 1.511 3.500 0.756 3634 0.754 50% 5342 1.285 85%
AM-501825 50.038 18.390 2.499 1.613 4.100 0.645 6708 0.726 45% 9038 1.049 65%
AM-501830 50.038 18.390 3.000 1.412 4.399 0.471 6565 0.424 30% 10471 0.706 50%
AM-502020 50.038 20.396 1.999 1.511 3.500 0.756 3723 0.757 50% 5693 1.361 90%
AM-502025 50.038 20.396 2.499 1.361 3.851 0.545 6054 0.681 50% 8069 0.955 70%
AM-502220 50.038 22.403 1.999 1.615 3.599 0.808 4208 0.808 50% 5836 1.293 80%
AM-502225 50.038 22.403 2.499 1.412 3.899 0.565 6534 0.706 50% 8678 0.991 70%
AM-502513 50.038 25.400 1.250 1.610 2.850 1.289 1397 0.805 50% 1721 1.610 100%
AM-502515 50.038 25.400 1.501 1.610 3.099 1.073 2153 0.805 50% 2807 1.369 85%
AM-502520 50.038 25.400 1.999 1.415 3.401 0.708 3741 0.709 50% 5582 1.204 85%
AM-502525 50.038 25.400 2.499 1.417 3.899 0.567 6979 0.709 50% 9270 0.993 70%
AM-502530 50.038 25.400 3.000 1.113 4.100 0.371 8118 0.500 45% 11436 0.724 65%
AM-562915 55.880 28.499 1.501 1.963 3.449 1.308 2415 0.983 50% 2833 1.572 80%
AM SERIES

AM-562920 55.880 28.499 1.999 1.615 3.599 0.808 3576 0.808 50% 5360 1.453 90%
AM-562930 55.880 28.499 3.000 1.316 4.300 0.439 8634 0.658 50% 11694 0.998 76%
mm & newtons

AM-602120 59.944 20.498 1.999 2.113 4.100 1.057 4079 1.057 50% 5622 2.007 95%
AM-602125 59.944 20.498 2.499 1.811 4.300 0.725 5805 0.907 50% 8247 1.450 80%
AM-602130 59.944 20.498 3.000 1.712 4.699 0.571 8189 0.770 45% 11187 1.113 65%
AM-602625 59.944 25.502 2.499 1.915 4.399 0.766 6561 0.958 50% 9207 1.534 80%
AM-602630 59.944 25.502 3.000 1.666 4.651 0.555 9087 0.833 50% 12090 1.166 70%
AM-603125 59.944 30.505 2.499 1.821 4.300 0.729 6645 0.912 50% 8558 1.275 70%
AM-603130 59.944 30.505 3.000 1.722 4.699 0.574 9385 0.775 45% 12815 1.120 65%
AM-603135 59.944 30.505 3.500 1.521 5.001 0.435 11276 0.610 40% 16329 0.912 60%
AM-633118 62.992 30.988 1.801 2.370 4.150 1.316 3905 1.186 50% 4435 1.659 70%
AM-633125 62.992 30.988 2.499 1.765 4.249 0.706 5640 0.884 50% 8789 1.590 90%
AM-633130 62.992 30.988 3.000 1.821 4.801 0.607 9754 0.912 50% 12859 1.275 70%
AM-633135 62.992 30.988 3.500 1.415 4.900 0.404 11249 0.706 50% 15314 1.062 75%
AM-702620 70.104 25.502 1.999 2.515 4.501 1.258 3999 1.257 50% 5022 2.515 100%
AM-703125 70.104 30.505 2.499 2.421 4.900 0.968 6721 1.209 50% 8852 1.935 80%
AM-703130 70.104 30.505 3.000 2.118 5.100 0.706 8998 1.059 50% 12859 1.694 80%
AM-703630 70.104 35.509 3.000 2.123 5.100 0.708 9706 1.062 50% 12552 1.488 70%
AM-703640 70.104 35.509 4.001 1.821 5.799 0.455 16484 0.820 45% 22947 1.184 65%
AM-704140 70.104 40.513 4.001 1.628 5.601 0.407 15968 0.732 45% 22391 1.057 65%
AM-704150 70.104 40.513 4.999 1.219 6.200 0.244 22596 0.549 45% 32279 0.792 65%
AM-713620 71.120 36.068 1.999 2.624 4.600 1.313 4706 1.313 50% 5346 1.836 70%
AM-713625 71.120 36.068 2.499 2.019 4.501 0.808 4079 0.706 35% 8340 1.133 56%
AM-713640 71.120 36.068 4.001 1.618 5.601 0.404 15359 0.810 50% 20906 1.143 71%
AM-803125 80.010 30.988 2.499 2.819 5.301 1.128 6325 1.410 50% 8407 2.677 95%
AM-803130 80.010 30.988 3.000 2.515 5.499 0.838 8407 1.257 50% 12437 2.263 90%
AM-803140 80.010 30.988 4.001 2.116 6.101 0.529 14807 1.059 50% 19789 1.481 70%
AM-803630 80.010 36.068 3.000 2.723 5.700 0.908 9892 1.361 50% 12792 2.042 75%
AM-803640 80.010 36.068 4.001 2.223 6.200 0.556 16462 1.110 50% 21898 1.554 70%
AM-804123 80.010 40.894 2.250 2.977 5.199 1.323 5769 1.339 45% 6748 1.935 65%
AM-804130 80.010 40.894 3.000 2.324 5.301 0.775 8384 1.161 50% 12236 1.976 85%
AM-804140 80.010 40.894 4.001 2.228 6.200 0.557 17605 1.113 50% 23419 1.560 70%
AM-804150 80.010 40.894 5.050 1.722 6.701 0.341 20203 0.686 40% 31999 1.087 63%
AM-904625 89.916 45.974 2.499 3.228 5.700 1.292 7019 1.615 50% 8162 2.421 75%
AM-904635 89.916 45.974 3.500 2.525 6.050 0.721 11498 1.288 51% 17005 2.189 87%
AM-904650 89.916 45.974 4.999 2.024 7.000 0.405 23561 1.013 50% 32070 1.417 70%
AM-1004140 100.076 40.894 4.001 3.226 7.201 0.806 16333 1.613 50% 23579 2.741 85%


8


410-391-7400
Fax 410-687-9223

ROLEX
AM-1004150 100.076 40.894 4.999 2.774 7.750 0.555 24802 1.387 50% 32995 1.943 70%
AM-1005127 100.076 51.054 2.700 3.528 6.200 1.307 7864 1.765 50% 9238 2.824 80%
AM-1005135 100.076 51.054 3.500 2.824 6.299 0.807 10453 1.412 50% 16240 2.682 95%
AM-1005140 100.076 51.054 4.001 3.033 7.000 0.758 16493 1.516 50% 22178 2.273 75%
AM-1005150 100.076 51.054 4.999 2.837 7.800 0.568 28080 1.420 50% 37274 1.986 70%
AM-1005160 100.076 51.054 5.999 2.228 8.199 0.371 32546 1.003 45% 45850 1.448 65%
AM-1125730 112.014 56.896 3.000 3.932 6.901 1.311 9585 1.966 50% 11249 3.147 80%
AM-1125740 112.014 56.896 4.001 3.228 7.201 0.807 14229 1.615 50% 21319 2.906 90%
AM-1125760 112.014 56.896 5.999 2.527 8.499 0.421 32684 1.262 50% 47242 1.895 75%
AM-1254140 124.968 40.894 4.001 4.219 8.199 1.055 14905 2.111 50% 21035 4.219 100%
AM-1255140 124.968 51.054 4.001 4.529 8.499 1.132 17387 2.266 50% 22169 3.851 85%
AM-1255150 124.968 51.054 4.999 3.932 8.900 0.787 24673 1.966 50% 35860 3.343 85%
AM-1255160 124.968 51.054 5.999 3.429 9.401 0.572 34094 1.715 50% 47887 2.570 75%
AM-1256150 124.968 60.960 4.999 4.044 8.999 0.809 27520 2.022 50% 34881 2.830 70%
AM-1256160 124.968 60.960 5.999 3.642 9.601 0.607 39467 1.821 50% 52028 2.550 70%
AM-1256180 124.968 60.960 7.493 3.508 10.899 0.468 45156 1.036 30% 78583 1.902 54%
AM-1256435 124.968 64.008 3.500 4.542 8.001 1.298 14109 2.271 50% 16084 3.180 70%
AM-1256450 124.968 64.008 4.999 3.536 8.499 0.707 23548 1.768 50% 35161 3.005 85%
AM-1256480 124.968 64.008 7.493 3.152 10.599 0.421 54288 1.262 40% 78774 1.892 60%
AM-1257160 124.968 71.120 5.999 3.350 9.299 0.558 36149 1.509 45% 49488 2.177 65%
AM-1257180 124.968 71.120 7.399 3.056 10.399 0.413 53078 1.222 40% 77111 1.831 60%
AM-1257110 124.968 71.120 9.200 2.654 11.801 0.289 67312 0.798 30% 110221 1.328 50%
AM-1407240 139.954 72.136 3.988 4.470 8.382 1.121 14585 2.215 50% 19558 4.209 94%
AM-1407250 139.954 72.136 5.050 3.988 8.999 0.790 27093 1.994 50% 34174 3.589 90%

AM SERIES
AM-1407280 139.954 72.136 7.493 3.759 11.199 0.502 59127 1.692 45% 81719 2.443 65%
AM-1506150 150.114 60.960 4.994 5.339 10.300 1.069 26684 2.672 50% 34872 4.542 85%

mm & newtons
AM-1506160 150.114 60.960 5.999 4.839 10.800 0.807 36665 2.418 50% 52922 4.112 85%
AM-1507160 150.114 71.120 5.999 4.849 10.800 0.808 38929 2.423 50% 51695 3.637 75%
AM-1507180 150.114 71.120 7.493 4.562 11.999 0.609 62134 2.052 45% 84294 2.967 65%
AM-1508180 150.114 81.026 7.493 4.272 11.699 0.570 55831 1.709 40% 79037 2.563 60%
AM-1508110 150.114 81.026 9.299 3.764 13.000 0.405 78356 1.318 35% 119238 2.073 55%
AM-1608243 160.020 82.042 4.300 5.646 9.901 1.313 20007 2.824 50% 23459 4.519 80%
AM-1608260 160.020 82.042 5.999 4.544 10.500 0.757 32555 2.273 50% 49751 4.089 90%
AM-1608210 160.020 82.042 9.398 4.163 13.500 0.443 87052 1.666 40% 125892 2.499 60%
AM-1809248 180.086 91.948 4.801 6.251 11.001 1.302 24095 3.124 50% 28360 5.001 80%
AM-1809260 180.086 91.948 5.999 5.144 11.100 0.857 30318 2.570 50% 47536 5.144 100%
AM-1809210 180.086 91.948 9.398 4.663 14.000 0.496 95014 2.332 50% 127622 3.264 70%
AM-2008280 199.898 82.042 7.600 6.652 14.201 0.875 61631 3.327 50% 83636 5.324 80%
AM-2008210 199.898 82.042 9.601 5.951 15.499 0.620 99724 2.977 50% 131172 4.166 70%
AM-2008212 199.898 82.042 11.501 5.151 16.599 0.448 114443 2.060 40% 165386 3.089 60%
AM-2009210 199.898 91.948 9.500 6.170 15.601 0.649 96806 2.776 45% 130326 4.011 65%
AM-2009212 199.898 91.948 11.400 5.464 16.800 0.479 125051 2.187 40% 179802 3.279 60%
AM-2009214 199.898 91.948 13.106 5.060 18.100 0.386 210724 2.530 50% 387434 3.795 75%
AM-20010260 199.898 102.108 5.994 6.502 12.497 1.085 35499 3.279 50% 45952 5.575 86%
AM-20010280 199.898 102.108 7.493 6.172 13.599 0.824 58594 3.086 50% 77484 4.630 75%
AM-20010210 199.898 102.108 9.398 6.292 15.601 0.669 92483 2.517 40% 128489 3.774 60%
AM-20010212 199.898 102.108 11.252 5.009 16.193 0.445 127564 2.253 45% 177862 3.256 65%
AM-20010214 199.898 102.108 13.106 5.179 18.199 0.395 141749 1.554 30% 228818 2.591 50%
AM-20011212 199.898 112.014 11.100 5.189 16.200 0.468 123121 2.078 40% 177368 3.114 60%
AM-20011214 199.898 112.014 12.901 4.686 17.501 0.363 149222 1.641 35% 228418 2.578 55%
AM-20011216 199.898 112.014 14.801 4.074 18.801 0.275 165096 1.224 30% 270763 2.040 50%
AM-22511285 225.044 112.014 6.200 7.463 13.599 1.204 36834 3.729 50% 46410 6.711 90%
AM-22511280 225.552 112.014 7.493 7.071 14.501 0.944 55195 3.536 50% 73272 5.659 80%
AM-22511212 225.044 112.014 11.252 5.814 17.000 0.517 128845 2.908 50% 183004 4.361 75%
AM-25010210 249.936 102.108 9.601 8.468 18.001 0.882 101450 4.234 50% 132128 6.353 75%
AM-25010212 249.936 102.108 11.501 7.564 18.999 0.658 141068 3.782 50% 184258 5.296 70%
AM-25012770 249.936 127.000 6.701 8.164 14.801 1.218 42091 4.082 50% 53389 7.752 95%
AM-25012710 249.936 127.000 9.398 7.684 17.000 0.818 91509 3.843 50% 121208 5.763 75%
AM-25012712 249.936 127.000 11.252 8.158 19.299 0.725 120954 2.855 35% 173699 4.488 55%
AM-25012714 249.936 127.000 13.106 6.581 19.601 0.502 188746 3.292 50% 253291 4.608 70%
AM-25012716 249.936 127.000 15.011 6.899 21.801 0.460 213993 2.416 35% 322871 3.795 55%


9


410-391-7400
Fax 410-687-9223

AM/SAM SERIES in INCHES and POUNDS
ROLEX
PART DIMENSIONS (Inches) MINIMUM MAXIMUM
OD ID t h OH h/t (Pounds) (f) % (Pounds) (f) %
AM-63203 0.236 0.126 0.012 0.008 0.016 0.667 20 0.003 38% 29 0.005 75%
AM-83202 0.315 0.126 0.008 0.008 0.016 0.987 5 0.004 50% 7 0.008 100%
AM-83203 0.315 0.126 0.012 0.010 0.022 0.838 19 0.005 50% 28 0.009 90%
AM-83204 0.315 0.126 0.016 0.008 0.024 0.510 23 0.003 35% 42 0.005 63%
AM-84202 0.315 0.165 0.008 0.010 0.018 1.252 8 0.005 50% 10 0.010 100%
AM-84203 0.315 0.165 0.012 0.010 0.022 0.839 21 0.005 51% 27 0.007 70%
AM-84204 0.315 0.165 0.016 0.008 0.024 0.510 36 0.004 50% 51 0.006 75%
AM-103203 0.394 0.126 0.012 0.014 0.026 1.178 20 0.007 50% 26 0.014 100%
AM-103204 0.394 0.126 0.016 0.012 0.028 0.764 32 0.006 50% 46 0.010 80%
AM-103205 0.394 0.126 0.020 0.010 0.030 0.502 39 0.004 40% 60 0.006 65%
AM-104204 0.394 0.165 0.016 0.012 0.028 0.764 34 0.006 50% 52 0.011 90%
AM-104205 0.394 0.165 0.020 0.010 0.030 0.502 50 0.005 50% 71 0.007 75%
AM-105225 0.394 0.205 0.010 0.012 0.022 1.224 12 0.006 50% 15 0.012 100%
AM-105204 0.394 0.205 0.016 0.012 0.028 0.764 38 0.006 50% 48 0.008 70%
AM-105205 0.394 0.205 0.020 0.010 0.030 0.503 55 0.005 51% 79 0.007 75%
AM-124204 0.472 0.165 0.016 0.016 0.032 1.013 34 0.008 50% 49 0.016 100%
AM-124205 0.472 0.165 0.020 0.014 0.034 0.706 51 0.007 50% 72 0.011 80%
AM-124206 0.472 0.165 0.024 0.016 0.039 0.674 83 0.006 40% 115 0.010 60%
AM-125205 0.472 0.205 0.020 0.016 0.035 0.802 64 0.008 50% 81 0.011 70%
AM-125206 0.472 0.205 0.024 0.014 0.037 0.589 89 0.007 50% 117 0.010 71%
AM-126205 0.472 0.244 0.020 0.014 0.034 0.711 58 0.007 50% 79 0.011 75%
AM-126206 0.472 0.244 0.024 0.014 0.037 0.593 80 0.006 40% 113 0.008 60%
AM-135205 0.492 0.205 0.020 0.014 0.034 0.706 48 0.007 50% 75 0.013 90%
AM-136235 0.492 0.244 0.014 0.018 0.032 1.290 31 0.009 50% 36 0.013 75%
AM SERIES

AM-136205 0.492 0.244 0.020 0.014 0.034 0.706 52 0.007 50% 81 0.013 90%
inches & pounds

AM-136207 0.492 0.244 0.028 0.012 0.039 0.431 102 0.005 45% 143 0.008 66%
AM-147235 0.551 0.283 0.014 0.018 0.032 1.290 25 0.009 50% 31 0.018 100%
AM-147205 0.551 0.283 0.020 0.016 0.035 0.802 50 0.008 50% 75 0.014 91%
AM-147208 0.551 0.283 0.032 0.012 0.043 0.378 134 0.006 50% 182 0.008 71%
AM-155204 0.591 0.205 0.016 0.022 0.037 1.389 37 0.011 50% 43 0.022 100%
AM-155205 0.591 0.205 0.020 0.020 0.039 1.005 53 0.010 50% 77 0.020 100%
AM-155206 0.591 0.205 0.024 0.018 0.041 0.754 73 0.009 50% 107 0.015 85%
AM-155207 0.591 0.205 0.028 0.016 0.043 0.572 96 0.008 50% 128 0.011 70%
AM-156205 0.591 0.244 0.020 0.020 0.039 1.005 55 0.010 50% 78 0.019 95%
AM-156206 0.591 0.244 0.024 0.018 0.041 0.754 75 0.009 50% 115 0.016 90%
AM-156207 0.591 0.244 0.028 0.016 0.043 0.572 100 0.008 50% 140 0.012 75%
AM-158207 0.591 0.323 0.028 0.016 0.043 0.576 116 0.008 50% 153 0.011 70%
AM-158208 0.591 0.323 0.032 0.016 0.047 0.505 154 0.007 45% 212 0.010 65%
AM-168204 0.630 0.323 0.016 0.020 0.035 1.261 31 0.010 50% 39 0.020 100%
AM-168206 0.630 0.323 0.024 0.018 0.041 0.758 73 0.009 50% 112 0.016 90%
AM-168207 0.630 0.323 0.028 0.018 0.045 0.649 113 0.009 50% 155 0.013 75%
AM-168208 0.630 0.323 0.032 0.016 0.047 0.505 140 0.008 50% 200 0.012 75%
AM-168209 0.630 0.323 0.035 0.014 0.049 0.395 170 0.007 50% 232 0.010 70%
AM-186204 0.709 0.244 0.016 0.024 0.039 1.516 30 0.012 50% 33 0.019 80%
AM-186205 0.709 0.244 0.020 0.024 0.043 1.203 49 0.012 50% 64 0.024 100%
AM-186206 0.709 0.244 0.024 0.024 0.047 1.004 76 0.012 50% 110 0.024 100%
AM-186207 0.709 0.244 0.028 0.022 0.049 0.786 100 0.011 50% 146 0.019 85%
AM-186208 0.709 0.244 0.032 0.020 0.051 0.629 126 0.010 50% 176 0.015 75%
AM-188205 0.709 0.323 0.020 0.024 0.043 1.208 53 0.012 50% 68 0.024 100%
AM-188207 0.709 0.323 0.028 0.022 0.049 0.790 108 0.011 50% 157 0.019 85%
AM-188208 0.709 0.323 0.032 0.020 0.051 0.632 136 0.010 50% 199 0.016 80%
AM-188210 0.709 0.323 0.039 0.016 0.055 0.401 199 0.008 50% 271 0.011 70%
AM-189245 0.709 0.362 0.018 0.024 0.041 1.345 44 0.012 50% 52 0.023 95%
AM-189207 0.709 0.362 0.028 0.020 0.047 0.717 100 0.010 50% 156 0.018 90%
AM-189210 0.709 0.362 0.039 0.016 0.055 0.404 211 0.008 50% 288 0.011 70%
AM-208206 0.787 0.323 0.024 0.028 0.051 1.178 82 0.014 50% 106 0.026 95%
AM-208207 0.787 0.323 0.028 0.026 0.053 0.931 107 0.013 50% 156 0.024 95%
AM-208208 0.787 0.323 0.032 0.024 0.055 0.756 134 0.012 50% 206 0.021 90%
AM-208209 0.787 0.323 0.035 0.022 0.057 0.619 166 0.011 50% 243 0.018 80%
AM-208210 0.787 0.323 0.039 0.022 0.061 0.553 224 0.011 50% 299 0.015 70%
AM-201005 0.787 0.402 0.020 0.026 0.045 1.310 52 0.013 50% 64 0.026 100%


10


410-391-7400
Fax 410-687-9223

ROLEX
AM-201008 0.787 0.402 0.032 0.022 0.053 0.692 132 0.011 50% 198 0.019 85%
AM-201009 0.787 0.402 0.035 0.022 0.057 0.619 184 0.011 50% 255 0.017 75%
AM-201010 0.787 0.402 0.039 0.022 0.061 0.556 248 0.011 50% 330 0.015 70%
AM-201011 0.787 0.402 0.043 0.018 0.061 0.413 256 0.009 50% 349 0.013 70%
AM-201013 0.787 0.402 0.049 0.020 0.069 0.407 304 0.007 35% 463 0.011 55%
AM-201015 0.787 0.402 0.059 0.012 0.071 0.201 420 0.006 50% 584 0.008 70%
AM-221106 0.886 0.441 0.024 0.032 0.055 1.343 88 0.016 50% 102 0.025 80%
AM-221108 0.886 0.441 0.032 0.026 0.057 0.819 128 0.013 50% 198 0.025 95%
AM-221113 0.886 0.441 0.049 0.020 0.069 0.404 324 0.010 50% 452 0.014 70%
AM-238207 0.906 0.323 0.028 0.032 0.059 1.149 108 0.016 50% 144 0.032 100%
AM-238208 0.906 0.323 0.032 0.030 0.061 0.943 134 0.015 50% 196 0.028 95%
AM-238209 0.906 0.323 0.035 0.028 0.063 0.785 166 0.014 50% 241 0.024 85%
AM-238210 0.906 0.323 0.039 0.028 0.067 0.703 221 0.014 50% 301 0.021 75%
AM-231009 0.906 0.402 0.035 0.030 0.065 0.845 194 0.015 50% 255 0.022 75%
AM-231010 0.906 0.402 0.039 0.028 0.067 0.706 234 0.014 50% 335 0.022 80%
AM-231013 0.906 0.402 0.049 0.026 0.075 0.526 363 0.012 45% 500 0.017 65%
AM-231210 0.906 0.480 0.039 0.024 0.063 0.607 211 0.012 50% 326 0.020 85%
AM-231213 0.906 0.480 0.049 0.024 0.073 0.486 363 0.011 45% 503 0.016 65%
AM-231215 0.906 0.480 0.059 0.020 0.079 0.337 449 0.008 40% 660 0.012 60%
AM-251010 0.984 0.402 0.039 0.030 0.069 0.754 211 0.015 50% 310 0.025 85%
AM-251207 0.984 0.480 0.028 0.036 0.063 1.293 124 0.018 50% 144 0.027 75%
AM-251209 0.984 0.480 0.035 0.028 0.063 0.785 155 0.014 50% 251 0.028 100%
AM-251210 0.984 0.480 0.039 0.032 0.071 0.807 249 0.016 50% 315 0.022 70%
AM-251213 0.984 0.480 0.049 0.028 0.077 0.567 385 0.014 50% 511 0.020 70%

AM SERIES
AM-251215 0.984 0.480 0.059 0.022 0.081 0.369 446 0.010 45% 629 0.014 65%

inches & pounds
AM-281008 1.100 0.402 0.032 0.038 0.069 1.194 133 0.019 50% 173 0.038 100%
AM-281010 1.100 0.402 0.039 0.036 0.075 0.904 211 0.018 50% 314 0.034 95%
AM-281013 1.100 0.402 0.049 0.032 0.081 0.644 326 0.016 50% 451 0.024 75%
AM-281015 1.100 0.402 0.059 0.028 0.089 0.469 462 0.013 45% 595 0.018 64%
AM-281210 1.100 0.480 0.039 0.038 0.077 0.957 241 0.019 50% 319 0.030 80%
AM-281213 1.100 0.480 0.049 0.034 0.083 0.687 371 0.017 50% 533 0.027 80%
AM-281215 1.100 0.480 0.059 0.030 0.089 0.504 484 0.013 45% 669 0.019 65%
AM-281408 1.100 0.559 0.032 0.040 0.071 1.263 164 0.020 50% 189 0.028 70%
AM-281410 1.100 0.559 0.039 0.032 0.071 0.807 202 0.016 50% 302 0.029 90%
AM-281413 1.100 0.559 0.049 0.034 0.083 0.689 368 0.015 45% 492 0.022 65%
AM-281415 1.100 0.559 0.059 0.026 0.085 0.437 483 0.013 50% 655 0.018 70%
AM-321210 1.240 0.480 0.039 0.044 0.083 1.107 229 0.022 50% 308 0.041 95%
AM-321213 1.240 0.480 0.049 0.038 0.087 0.766 324 0.019 50% 474 0.032 85%
AM-321215 1.240 0.480 0.059 0.034 0.093 0.569 465 0.017 50% 653 0.025 75%
AM-321608 1.240 0.642 0.032 0.042 0.073 1.321 141 0.021 50% 168 0.038 90%
AM-321613 1.240 0.642 0.049 0.036 0.085 0.728 340 0.018 50% 482 0.029 80%
AM-321615 1.240 0.642 0.059 0.036 0.095 0.607 518 0.016 45% 704 0.023 65%
AM-321618 1.240 0.642 0.069 0.028 0.097 0.403 655 0.014 50% 892 0.020 70%
AM-321620 1.240 0.642 0.079 0.030 0.108 0.381 854 0.012 40% 1247 0.018 60%
AM-341210 1.340 0.480 0.039 0.050 0.089 1.256 239 0.025 50% 297 0.047 95%
AM-341213 1.340 0.480 0.049 0.044 0.093 0.886 335 0.022 50% 486 0.039 90%
AM-341215 1.340 0.480 0.059 0.040 0.098 0.670 479 0.020 50% 658 0.030 75%
AM-341413 1.340 0.563 0.049 0.046 0.095 0.929 372 0.023 50% 496 0.037 80%
AM-341415 1.340 0.563 0.059 0.042 0.100 0.706 532 0.021 50% 760 0.033 80%
AM-341615 1.340 0.642 0.059 0.042 0.100 0.706 562 0.021 50% 727 0.029 70%
AM-341620 1.340 0.642 0.079 0.034 0.112 0.431 800 0.014 40% 1159 0.020 60%
AM-361809 1.400 0.720 0.035 0.046 0.081 1.288 168 0.023 50% 207 0.046 100%
AM-361813 1.400 0.720 0.049 0.040 0.089 0.809 305 0.020 50% 473 0.038 95%
AM-361820 1.400 0.720 0.079 0.032 0.110 0.405 870 0.016 50% 1184 0.022 70%
AM-401413 1.570 0.563 0.049 0.055 0.104 1.126 352 0.028 50% 477 0.055 100%
AM-401415 1.570 0.563 0.059 0.050 0.108 0.838 470 0.025 50% 695 0.045 90%
AM-401420 1.570 0.563 0.079 0.042 0.120 0.530 752 0.019 45% 1035 0.027 65%
AM-401615 1.570 0.842 0.059 0.052 0.110 0.871 543 0.023 45% 698 0.034 65%
AM-401620 1.570 0.642 0.079 0.044 0.122 0.555 898 0.022 50% 1195 0.031 70%
AM-401820 1.570 0.720 0.079 0.046 0.124 0.582 991 0.023 50% 1313 0.032 70%
AM-402010 1.570 0.803 0.039 0.052 0.091 1.310 210 0.026 50% 256 0.052 100%


11


410-391-7400
Fax 410-687-9223

ROLEX
AM-402015 1.570 0.803 0.059 0.046 0.104 0.772 474 0.023 50% 693 0.039 85%
AM-402020 1.570 0.803 0.079 0.044 0.122 0.558 995 0.022 50% 1323 0.031 70%
AM-402023 1.570 0.803 0.089 0.036 0.124 0.404 1106 0.018 50% 1506 0.025 70%
AM-402025 1.570 0.803 0.098 0.038 0.136 0.385 1304 0.015 40% 1902 0.023 60%
AM-452213 1.770 0.882 0.049 0.064 0.112 1.291 388 0.032 50% 452 0.048 75%
AM-452218 1.770 0.882 0.069 0.052 0.120 0.750 653 0.026 50% 960 0.044 85%
AM-452225 1.770 0.882 0.098 0.040 0.138 0.404 1301 0.020 50% 1771 0.028 70%
AM-501813 1.970 0.724 0.049 0.063 0.112 1.287 279 0.032 50% 344 0.063 100%
AM-501815 1.970 0.724 0.059 0.071 0.130 1.205 523 0.036 50% 677 0.071 100%
AM-501820 1.970 0.724 0.079 0.060 0.138 0.756 817 0.030 50% 1201 0.051 85%
AM-501825 1.970 0.724 0.098 0.064 0.161 0.645 1508 0.029 45% 2032 0.041 65%
AM-501830 1.970 0.724 0.118 0.056 0.173 0.471 1476 0.017 30% 2354 0.028 50%
AM-502020 1.970 0.803 0.079 0.060 0.138 0.756 837 0.030 50% 1280 0.054 90%
AM-502025 1.970 0.803 0.098 0.054 0.152 0.545 1361 0.027 50% 1814 0.038 70%
AM-502220 1.970 0.882 0.079 0.064 0.142 0.808 946 0.032 50% 1312 0.051 80%
AM-502225 1.970 0.882 0.098 0.056 0.154 0.565 1469 0.028 50% 1951 0.039 70%
AM-502513 1.970 1.000 0.049 0.063 0.112 1.289 314 0.032 50% 387 0.063 100%
AM-502515 1.970 1.000 0.059 0.063 0.122 1.073 484 0.032 50% 631 0.054 85%
AM-502520 1.970 1.000 0.079 0.056 0.134 0.708 841 0.028 50% 1255 0.047 85%
AM-502525 1.970 1.000 0.098 0.056 0.154 0.567 1569 0.028 50% 2084 0.039 70%
AM-502530 1.970 1.000 0.118 0.044 0.161 0.371 1825 0.020 45% 2571 0.029 65%
AM-562915 2.200 1.122 0.059 0.077 0.136 1.308 543 0.039 50% 637 0.062 80%
AM-562920 2.200 1.122 0.079 0.064 0.142 0.808 804 0.032 50% 1205 0.057 90%
AM-562930 2.200 1.122 0.118 0.052 0.169 0.439 1941 0.026 50% 2629 0.039 76%
AM SERIES

AM-602120 2.360 0.807 0.079 0.083 0.161 1.057 917 0.042 50% 1264 0.079 95%
inches & pounds

AM-602125 2.360 0.807 0.098 0.071 0.169 0.725 1305 0.036 50% 1854 0.057 80%
AM-602130 2.360 0.807 0.118 0.067 0.185 0.571 1841 0.030 45% 2515 0.044 65%
AM-602625 2.360 1.004 0.098 0.075 0.173 0.766 1475 0.038 50% 2070 0.060 80%
AM-602630 2.360 1.004 0.118 0.066 0.183 0.555 2043 0.033 50% 2718 0.046 70%
AM-603125 2.360 1.201 0.098 0.072 0.169 0.729 1494 0.036 50% 1924 0.050 70%
AM-603130 2.360 1.201 0.118 0.068 0.185 0.574 2110 0.031 45% 2881 0.044 65%
AM-603135 2.360 1.201 0.138 0.060 0.197 0.435 2535 0.024 40% 3671 0.036 60%
AM-633118 2.480 1.220 0.071 0.093 0.163 1.316 878 0.047 50% 997 0.065 70%
AM-633125 2.480 1.220 0.098 0.070 0.163 0.706 1268 0.035 50% 1976 0.063 90%
AM-633130 2.480 1.220 0.118 0.072 0.189 0.607 2193 0.036 50% 2891 0.050 70%
AM-633135 2.480 1.220 0.138 0.056 0.193 0.404 2529 0.028 50% 3443 0.042 75%
AM-702620 2.760 1.004 0.079 0.099 0.177 1.258 899 0.050 50% 1129 0.099 100%
AM-703125 2.760 1.201 0.098 0.095 0.193 0.968 1511 0.048 50% 1990 0.076 80%
AM-703130 2.760 1.201 0.118 0.083 0.201 0.706 2023 0.042 50% 2891 0.067 80%
AM-703630 2.760 1.398 0.118 0.084 0.201 0.708 2182 0.042 50% 2822 0.059 70%
AM-703640 2.760 1.398 0.158 0.072 0.228 0.455 3706 0.032 45% 5159 0.047 65%
AM-704140 2.760 1.595 0.158 0.064 0.221 0.407 3590 0.029 45% 5034 0.042 65%
AM-704150 2.760 1.595 0.197 0.048 0.244 0.244 5080 0.022 45% 7257 0.031 65%
AM-713620 2.799 1.420 0.079 0.103 0.181 1.313 1058 0.052 50% 1202 0.072 70%
AM-713625 2.799 1.420 0.098 0.080 0.177 0.808 917 0.028 35% 1875 0.045 56%
AM-713640 2.799 1.420 0.158 0.064 0.221 0.404 3453 0.032 50% 4700 0.045 71%
AM-803125 3.150 1.220 0.098 0.111 0.209 1.128 1422 0.056 50% 1890 0.105 95%
AM-803130 3.150 1.220 0.118 0.099 0.217 0.838 1890 0.050 50% 2796 0.089 90%
AM-803140 3.150 1.220 0.158 0.083 0.240 0.529 3329 0.042 50% 4449 0.058 70%
AM-803630 3.150 1.420 0.118 0.107 0.224 0.908 2224 0.054 50% 2876 0.080 75%
AM-803640 3.150 1.420 0.158 0.088 0.244 0.556 3701 0.044 50% 4923 0.061 70%
AM-804123 3.150 1.610 0.089 0.117 0.205 1.323 1297 0.053 45% 1517 0.076 65%
AM-804130 3.150 1.610 0.118 0.092 0.209 0.775 1885 0.046 50% 2751 0.078 85%
AM-804140 3.150 1.610 0.158 0.088 0.244 0.557 3958 0.044 50% 5265 0.061 70%
AM-804150 3.150 1.610 0.199 0.068 0.264 0.341 4542 0.027 40% 7194 0.043 63%
AM-904625 3.540 1.810 0.098 0.127 0.224 1.292 1578 0.064 50% 1835 0.095 75%
AM-904635 3.540 1.810 0.138 0.099 0.236 0.721 2585 0.051 51% 3823 0.086 87%
AM-904650 3.540 1.810 0.197 0.080 0.276 0.405 5297 0.040 50% 7210 0.056 70%
AM-1004140 3.940 1.610 0.158 0.127 0.284 0.806 3672 0.064 50% 5301 0.108 85%
AM-1004150 3.940 1.610 0.197 0.109 0.305 0.555 5576 0.055 50% 7418 0.077 70%


12


410-391-7400
Fax 410-687-9223

ROLEX
AM-1005127 3.940 2.010 0.106 0.139 0.244 1.307 1768 0.070 50% 2077 0.111 80%
AM-1005135 3.940 2.010 0.138 0.111 0.248 0.807 2350 0.056 50% 3651 0.106 95%
AM-1005140 3.940 2.010 0.158 0.119 0.276 0.758 3708 0.060 50% 4986 0.090 75%
AM-1005150 3.940 2.010 0.197 0.112 0.307 0.568 6313 0.056 50% 8380 0.078 70%
AM-1005160 3.940 2.010 0.236 0.088 0.323 0.371 7317 0.040 45% 10308 0.057 65%
AM-1125730 4.410 2.240 0.118 0.155 0.272 1.311 2155 0.077 50% 2529 0.124 80%
AM-1125740 4.410 2.240 0.158 0.127 0.284 0.807 3199 0.064 50% 4793 0.114 90%
AM-1125760 4.410 2.240 0.236 0.100 0.335 0.421 7348 0.050 50% 10621 0.075 75%
AM-1254140 4.920 1.610 0.158 0.166 0.323 1.055 3351 0.083 50% 4729 0.166 100%
AM-1255140 4.920 2.010 0.158 0.178 0.335 1.132 3909 0.089 50% 4984 0.152 85%
AM-1255150 4.920 2.010 0.197 0.155 0.350 0.787 5547 0.077 50% 8062 0.132 85%
AM-1255160 4.920 2.010 0.236 0.135 0.370 0.572 7665 0.068 50% 10766 0.101 75%
AM-1256150 4.920 2.400 0.197 0.159 0.354 0.809 6187 0.080 50% 7842 0.111 70%
AM-1256160 4.920 2.400 0.236 0.143 0.378 0.607 8873 0.072 50% 11697 0.100 70%
AM-1256180 4.920 2.400 0.295 0.138 0.429 0.468 10152 0.041 30% 17667 0.075 54%
AM-1256435 4.920 2.520 0.138 0.179 0.315 1.298 3172 0.089 50% 3616 0.125 70%
AM-1256450 4.920 2.520 0.197 0.139 0.335 0.707 5294 0.070 50% 7905 0.118 85%
AM-1256480 4.920 2.520 0.295 0.124 0.417 0.421 12205 0.050 40% 17710 0.075 60%
AM-1257160 4.920 2.800 0.236 0.132 0.366 0.558 8127 0.059 45% 11126 0.086 65%
AM-1257180 4.920 2.800 0.291 0.120 0.409 0.413 11933 0.048 40% 17336 0.072 60%
AM-1257110 4.920 2.800 0.362 0.105 0.465 0.289 15133 0.031 30% 24780 0.052 50%
AM-1407240 5.510 2.840 0.157 0.176 0.330 1.121 3279 0.087 50% 4397 0.166 94%
AM-1407250 5.510 2.840 0.199 0.157 0.354 0.790 6091 0.079 50% 7683 0.141 90%
AM-1407280 5.510 2.840 0.295 0.148 0.441 0.502 13293 0.067 45% 18372 0.096 65%

AM SERIES
AM-1506150 5.910 2.400 0.197 0.210 0.406 1.069 5999 0.105 50% 7840 0.179 85%

inches & pounds
AM-1506160 5.910 2.400 0.236 0.191 0.425 0.807 8243 0.095 50% 11898 0.162 85%
AM-1507160 5.910 2.800 0.236 0.191 0.425 0.808 8752 0.095 50% 11622 0.143 75%
AM-1507180 5.910 2.800 0.295 0.180 0.472 0.609 13969 0.081 45% 18951 0.117 65%
AM-1508180 5.910 3.190 0.295 0.168 0.461 0.570 12552 0.067 40% 17769 0.101 60%
AM-1508110 5.910 3.190 0.366 0.148 0.512 0.405 17616 0.052 35% 26807 0.082 55%
AM-1608243 6.300 3.230 0.169 0.222 0.390 1.313 4498 0.111 50% 5274 0.178 80%
AM-1608260 6.300 3.230 0.236 0.179 0.413 0.757 7319 0.090 50% 11185 0.161 90%
AM-1608210 6.300 3.230 0.370 0.164 0.532 0.443 19571 0.066 40% 28303 0.098 60%
AM-1809248 7.090 3.620 0.189 0.246 0.433 1.302 5417 0.123 50% 6376 0.197 80%
AM-1809260 7.090 3.620 0.236 0.203 0.437 0.857 6816 0.101 50% 10687 0.203 100%
AM-1809210 7.090 3.620 0.370 0.184 0.551 0.496 21361 0.092 50% 28692 0.129 70%
AM-2008280 7.870 3.230 0.299 0.262 0.559 0.875 13856 0.131 50% 18803 0.210 80%
AM-2008210 7.870 3.230 0.378 0.234 0.610 0.620 22420 0.117 50% 29490 0.164 70%
AM-2008212 7.870 3.230 0.453 0.203 0.654 0.448 25729 0.081 40% 37182 0.122 60%
AM-2009210 7.870 3.620 0.374 0.243 0.614 0.649 21764 0.109 45% 29300 0.158 65%
AM-2009212 7.870 3.620 0.449 0.215 0.661 0.479 28114 0.086 40% 40423 0.129 60%
AM-2009214 7.870 3.620 0.516 0.199 0.713 0.386 47375 0.100 50% 87103 0.149 75%
AM-20010260 7.870 4.020 0.236 0.256 0.492 1.085 7981 0.129 50% 10331 0.220 86%
AM-20010280 7.870 4.020 0.295 0.243 0.535 0.824 13173 0.122 50% 17420 0.182 75%
AM-20010210 7.870 4.020 0.370 0.248 0.614 0.669 20792 0.099 40% 28887 0.149 60%
AM-20010212 7.870 4.020 0.443 0.197 0.638 0.445 28679 0.089 45% 39987 0.128 65%
AM-20010214 7.870 4.020 0.516 0.204 0.717 0.395 31868 0.061 30% 51443 0.102 50%
AM-20011212 7.870 4.410 0.437 0.204 0.638 0.468 27680 0.082 40% 39876 0.123 60%
AM-20011214 7.870 4.410 0.508 0.185 0.689 0.363 33548 0.065 35% 51353 0.102 55%
AM-20011216 7.870 4.410 0.583 0.160 0.740 0.275 37117 0.048 30% 60873 0.080 50%
AM-22511285 8.860 4.410 0.244 0.294 0.535 1.204 8281 0.147 50% 10434 0.264 90%
AM-22511280 8.880 4.410 0.295 0.278 0.571 0.944 12409 0.139 50% 16473 0.223 80%
AM-22511212 8.860 4.410 0.443 0.229 0.669 0.517 28967 0.115 50% 41143 0.172 75%
AM-25010210 9.840 4.020 0.378 0.333 0.709 0.882 22808 0.167 50% 29705 0.250 75%
AM-25010212 9.840 4.020 0.453 0.298 0.748 0.658 31715 0.149 50% 41425 0.209 70%
AM-25012770 9.840 5.000 0.264 0.321 0.583 1.218 9463 0.161 50% 12003 0.305 95%
AM-25012710 9.840 5.000 0.370 0.303 0.669 0.818 20573 0.151 50% 27250 0.227 75%
AM-25012712 9.840 5.000 0.443 0.321 0.760 0.725 27193 0.112 35% 39051 0.177 55%
AM-25012714 9.840 5.000 0.516 0.259 0.772 0.502 42434 0.130 50% 56945 0.181 70%
AM-25012716 9.840 5.000 0.591 0.272 0.858 0.460 48110 0.095 35% 72588 0.149 55%


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AI, AK, SAI, SAK SERIES AND ST ANDARD SPRING TOLERANCES

The tolerances on this page are for the AI and AK (AISI 1075 or AISI 6150 carbon
steel) and SAI and SAK (17/7 PH stainless steel) series parts. THICKNESS (t) TOLERANCE
Carbon Steel AISI C1075 or AISI 6150
Refer to the “SAI” and/or “SAK” columns for dimensional and/or tolerance
differences required for ALL 17/7 PH stainless steel parts. AI & AK Series (MM) AI & AK Series (Inches)
ALL stainless steel materials will utilize these SAI or SAK specifications with the
exception of materials not a vailable in the standard tolerance range. In those < 0.70 - 0.025 < 0.0276 ± 0.0015
cases, the closest material tolerance will be used. > = 0.70 > = 0.0276
± 0.051 ± 0.0025
< 2.25 < 0.088
When requesting parts made of stainless steel, add the letter “S” in front of the > = 2.25 > = 0.088
± 0.076 ± 0.0035
existing part number. For example, carbon steel part number AK-6312 becomes < 3.00 < 0.118
SAK-6312 for stainless steel. > = 3.00 > = 0.118
± 0.102 ± 0.0045
< 4.00 < 0.157
For a vailability of other ma terial types and achievable tolerances, please call > = 4.00 ± 0.127 > = 0.157 ± 0.0055
Rolex Sales or Engineering for assistance.
Design Note : stainless steel ma terial thickness is different than steel and is
subject to commercial availability. The overall height will be used to compensate THICKNESS (t) TOLERANCE
for the difference in load due to the difference in thickness. 17/7 PH Stainless Steel
SAI & SAK Series (MM) SAI & SAK Series (Inches)

OUTSIDE & INSIDE DIAMETER TOLERANCE < = 0.51 ± 0.05 < = 0.020 ± 0.002
> 0.51 > 0.020
AI & AK Series (MM) SAI, SAK (MM) AI & AK SERIES (Inches) SAI, SAK (In.) ± 0.08 ± 0.003
< = 1.27 < = 0.050
Carbon Steel Stainless Carbon Steel Stainless > 1.27 > 0.050
± 0.10 ± 0.004
Range Tolerance Tolerance Range Tolerance Tolerance < = 2.34 < = 0.092
> 2.34 > 0.092
ID + 0.152 ID + 0.152 ID + 0.006 ID + 0.006 ± 0.13 ± 0.005
< = 3.0 < = 0.118 < = 3.18 < = 0.125
OD - 0.152 OD - 0.152 OD - 0.006 OD - 0.006
> 3.18 > 0.125
> 3.0 ID + 0.178 ID + 0.178 > 0.118 ID + 0.007 ID + 0.007 ± 0.20 ± 0.008
< = 4.95 < = 0.195
< = 6.0 OD - 0.178 OD - 0.178 < = 0.236 OD - 0.007 OD - 0.007
> 4.95 ± 0.25 > 0.195 ± 0.010
> 6.0 ID + 0.203 ID + 0.203 > 0.236 ID + 0.008 ID + 0.008
< = 10.0 OD - 0.203 OD - 0.203 < = 0.394 OD - 0.008 OD - 0.008
> 10.0 ID + 0.229 ID + 0.229 > 0.394 ID + 0.009 ID + 0.009 OPERATION LOAD TOLERANCE
< = 18.0 OD - 0.229 OD - 0.229 < = 0.709 OD - 0.009 OD - 0.009
> 18.0 ID + 0.254 ID + 0.254 > 0.709 ID + 0.010 ID + 0.010 Thickness Range AI AK, SAI & SAK
< = 30.0 OD - 0.254 OD - 0.254 < = 1.180 OD - 0.010 OD - 0.010 MM Inches Series Series
> 30.0 ID + 0.305 ID + 0.305 > 1.180 ID + 0.012 ID + 0.012 + 25.0%
< = 50.0 OD - 0.305 OD - 0.305 < = 1.970 OD - 0.012 OD - 0.012 < = 1.25 < = .049 ± 20%
- 7.5%
> 50.0 ID + 0.356 ID + 0.356 > 1.970 ID + 0.014 ID + 0.014 > 1.25 > .049 + 15.0%
< = 80.0 OD - 0.356 OD - 0.356 < = 3.150 OD - 0.014 OD - 0.014 ± 20%
< = 3.00 < = .118 - 7.5%
> 80.0 ID + 0.406 ID + 0.406 > 3.150 ID + 0.016 ID + 0.016 > 3.00 > .118 + 10.0%
<=120.0 OD - 0.406 OD - 0.406 < = 4.720 OD - 0.016 OD - 0.016 ± 20%
< = 6.00 < = .236 - 5.0%
> 120.0 ID + 0.457 ID + 0.457 > 4.720 ID + 0.018 ID + 0.018 + 5.0%
<=180.0 OD - 0.457 OD - 0.457 < = 7.090 OD - 0.018 OD - 0.018 > 6.00 > .236 ± 20%
- 5.0%
ID + 0.508 ID + 0.508 ID + 0.020 ID + 0.020
> 180.0 > 7.090
OD - 0.508 OD - 0.508 OD - 0.020 OD - 0.020
TOLERANCES

HARDNESS TOLERANCE
AI Series Tolerance SAI
OVERALL HEIGHT TOLERANCE
Thickness Range Rockwell Stainless
AI & AK Series (MM) SAI, SAK (MM) AI & AK Series (In.) SAI, SAK (In.) MM Inches HRc HRc
by part thickness Stainless by part thickness Stainless
< 1.00 < 0.039 46 - 51 Minimum 38
t Range OH Tol. OH Tol. t Range OH Tol. OH Tol.
> = 1.00 > = 0.039
+ 0.10 + 0.11 + .004 + 0.0045 44 - 49 Minimum 38
< = 1.25 < = .049 < 4.25 < 0.157
- 0.05 - 0.06 - .002 - 0.0025 > = 4.25 > = 0.157 42 - 48 Minimum 38
> 1.25 + 0.15 + 0.17 > .049 + .006 + 0.0065
<= 2.00 - 0.08 - 0.09 < = .078 - .003 - 0.0035
> 2.00 + 0.30 + 0.32 > .078 + .012 + 0.0125 HARDNESS TOLERANCE
<= 3.00 - 0.10 - 0.11 < = .118 - .004 - 0.0045 AK Series Tolerance SAK
> 3.00 + 0.30 + 0.32 > .118 + .012 + 0.0125 Thickness Range Rockwell Stainless
<= 6.00 - 0.15 - 0.17 < = .236 - .006 - 0.0065
MM Inches HRc HRc
+ 0.30 + 0.32 + .012 + 0.0125
> 6.00 > .236 ALL ALL 40 - 51 Minimum 38
- 0.30 - 0.32 - .012 - 0.0125

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AI/SAI SERIES in INCHES and POUNDS

AI series pre-stressed disc springs ar e used to maintain TYPICAL BOLTED ASSEMBLY UTILIZING DISC SPRINGS
load or tension in bolted assemblies. Pr essure begins at
the outer radius and flattens gradually toward the bolt as
deflection pr ogresses. Disc springs exert a uniform

AI SERIES
inches & pounds
pressure that r emains constant despite tension losses
caused by thermal expansion and contraction,
compression set or wear of parts. Because pr ssures are
e
predictable, disc springs pr ovide a simple and ef fective
means of determining bolt tension that is far mor e
accurate than “torque” readings.

ROLEX NOM. DIMENSIONS (Inches) DEFLECTION = .75h DEFLECTION = Flat DRY
TORQUE
PART BOLT TO FLAT
OD ID t h OH Load Deflection P f
NUMBER SIZE (Pounds) (f) Max. Max. (Ft-Lb)*
AI-180907 0.187 0.093 0.007 0.006 0.013 10 0.005 12 0.006 0.2
#2
AI-180910 0.187 0.093 0.010 0.005 0.015 23 0.004 30 0.005 0.6
AI-251209 0.250 0.125 0.009 0.008 0.017 16 0.006 19 0.008 0.5
#4
AI-251213 0.250 0.125 0.013 0.007 0.020 40 0.005 51 0.007 1.3
AI-281315 0.281 0.138 0.015 0.008 0.023 55 0.006 70 0.008 1.9
#6
AI-431322 0.437 0.138 0.022 0.010 0.032 78 0.008 100 0.010 2.8
AI-311511 0.312 0.156 0.011 0.011 0.022 27 0.008 31 0.011 1.0
5/32
AI-311517 0.312 0.156 0.017 0.008 0.025 65 0.006 83 0.008 2.6
AI-341619 #8 0.343 0.164 0.019 0.009 0.028 82 0.007 105 0.009 3.4
AI-371915 0.375 0.195 0.015 0.012 0.027 50 0.009 60 0.012 2.3
AI-371918 0.375 0.195 0.018 0.010 0.028 68 0.008 87 0.010 3.4
3/16
AI-371920 0.375 0.195 0.020 0.010 0.030 93 0.008 120 0.010 4.7
AI-371930 0.375 0.195 0.030 0.010 0.040 323 0.008 423 0.010 16.5
AI-502518 0.500 0.255 0.018 0.016 0.034 64 0.012 76 0.016 3.9
AI-502519 0.500 0.258 0.019 0.016 0.035 76 0.012 91 0.016 4.7
AI-502523 1/4 0.500 0.258 0.023 0.016 0.039 132 0.012 163 0.016 8.4
AI-502525 0.500 0.255 0.025 0.013 0.038 132 0.010 168 0.013 8.6
AI-502538 0.500 0.255 0.038 0.010 0.048 353 0.008 465 0.010 23.7
AI-623122 0.625 0.317 0.022 0.020 0.042 94 0.015 111 0.020 0.6
AI-623132 0.625 0.317 0.032 0.016 0.048 213 0.012 273 0.016 1.4
AI-753227 5/16 0.750 0.320 0.028 0.024 0.052 148 0.018 177 0.024 0.9
AI-753231 0.750 0.320 0.032 0.024 0.056 216 0.018 265 0.024 1.4
AI-933145 0.937 0.317 0.045 0.022 0.067 321 0.017 412 0.022 2.2
AI-683823 0.688 0.382 0.024 0.020 0.044 106 0.015 127 0.020 0.8
AI-683827 0.688 0.382 0.028 0.020 0.048 165 0.015 203 0.020 1.3
AI-753828 0.750 0.380 0.028 0.023 0.051 152 0.017 183 0.023 1.2
AI-753831 0.750 0.382 0.032 0.020 0.052 190 0.015 239 0.020 1.5
AI-753834 3/8 0.750 0.380 0.034 0.021 0.055 241 0.016 302 0.021 1.9
AI-753835 0.750 0.382 0.035 0.022 0.057 277 0.017 348 0.022 2.2
AI-753840 0.750 0.382 0.040 0.019 0.059 350 0.014 450 0.019 2.9
AI-753856 0.750 0.380 0.056 0.014 0.070 697 0.011 920 0.014 5.8
AI-953847 0.950 0.380 0.047 0.023 0.070 384 0.017 493 0.023 3.1
AI-104435 1.000 0.445 0.035 0.032 0.067 222 0.024 262 0.032 1.9
AI-104439 1.000 0.445 0.039 0.032 0.071 303 0.024 364 0.032 2.7
AI-104449 7/16 1.000 0.445 0.049 0.026 0.075 462 0.020 590 0.026 4.4
AI-874431 0.875 0.442 0.031 0.028 0.059 187 0.021 221 0.028 1.6
AI-874445 0.875 0.442 0.045 0.022 0.067 422 0.017 541 0.022 4.0
AI-105135 1.000 0.512 0.035 0.032 0.067 239 0.024 281 0.032 2.4
AI-105139 1.000 0.512 0.039 0.036 0.075 377 0.027 443 0.036 3.8
AI-105149 1.000 0.512 0.049 0.034 0.083 678 0.026 839 0.034 7.2
1/2
AI-105159 1.000 0.512 0.059 0.028 0.087 945 0.021 1216 0.028 10.4
AI-115139 1.100 0.512 0.039 0.036 0.075 293 0.027 344 0.036 2.9
AI-115149 1.100 0.512 0.049 0.030 0.083 525 0.025 650 0.034 5.5
Note: Standard commercial tolerances apply. *Dry torque values for parts with ID ≤ 0.312 are given in in pounds.


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AI/SAI SERIES in INCHES and POUNDS

ROLEX Nom. DIMENSIONS (Inches) DEFLECTION = .75h DEFLECTION = Flat Dry
Torque
PART Bolt to Flat
NUMBER Size OD ID t h OH Load Deflection P f
(Pounds) (f) Max. Max. (Ft-Lb)*
AI SERIES

AI-115159 1.100 0.512 0.059 0.028 0.087 731 0.021 941 0.028 8.0
inches & pounds

1/2
AI-105173 1.000 0.512 0.073 0.018 0.091 1121 0.014 1480 0.018 12.6
AI-115638 1.125 0.567 0.038 0.035 0.073 261 0.026 306 0.035 2.9
9/16
AI-115656 1.125 0.567 0.056 0.028 0.084 622 0.021 797 0.028 7.5
AI-126340 1.250 0.630 0.040 0.042 0.082 307 0.031 348 0.042 3.7
AI-126362 1.250 0.630 0.062 0.030 0.092 730 0.022 938 0.030 9.8
AI-126389 5/8 1.250 0.630 0.089 0.022 0.111 1570 0.017 2073 0.022 21.8
AI-136349 1.375 0.637 0.049 0.046 0.095 475 0.034 555 0.046 5.9
AI-136359 1.375 0.637 0.059 0.043 0.102 745 0.032 915 0.043 9.7
AI-136378 1.375 0.637 0.078 0.032 0.110 1223 0.024 1588 0.032 16.9
AI-136944 1.375 0.692 0.045 0.044 0.089 370 0.033 428 0.044 4.9
11/16
AI-136967 1.375 0.692 0.067 0.034 0.101 865 0.025 1108 0.034 12.8
AI-157545 1.500 0.755 0.045 0.048 0.093 346 0.036 391 0.048 4.9
AI-157572 1.500 0.755 0.072 0.037 0.109 982 0.028 1256 0.037 15.8
AI-157659 1.500 0.761 0.059 0.055 0.114 883 0.041 1034 0.055 13.1
3/4
AI-157678 1.500 0.761 0.078 0.044 0.122 1523 0.033 1932 0.044 24.5
AI-157698 1.500 0.761 0.098 0.036 0.134 2427 0.027 3167 0.036 40.2
AI-1575107 1.500 0.755 0.107 0.027 0.134 2326 0.020 3070 0.027 38.6
AI-178885 7/8 1.750 0.880 0.085 0.043 0.128 1377 0.032 1764 0.043 25.9
AI-201065 2.000 1.016 0.065 0.065 0.130 788 0.049 906 0.065 15.3
AI-201078 2.000 1.016 0.078 0.060 0.138 1195 0.045 1455 0.060 24.6
AI-201098 2.000 1.016 0.098 0.060 0.158 2329 0.045 2929 0.060 49.6
AI-201011 1 2.000 1.016 0.118 0.047 0.165 3101 0.035 4032 0.047 68.3
AI-231078 2.375 1.016 0.078 0.079 0.157 1085 0.059 1245 0.079 21.1
AI-231098 2.375 1.016 0.098 0.079 0.177 2066 0.059 2497 0.079 42.3
AI-231011 2.375 1.016 0.118 0.063 0.181 2742 0.047 3497 0.063 59.2
AI-251280 2.500 1.250 0.080 0.080 0.160 1143 0.060 1315 0.080 27.4
AI-251212 1-1/4 2.500 1.250 0.120 0.060 0.180 2635 0.045 3379 0.060 70.4
Note: Standard commercial tolerances apply. *Dry torque values for parts with ID ≤ 0.312 are given in in pounds.

DID YOU KNOW...

MPS/Rolex Spring can custom manufacture your disc springs
to suit your applications
MPS/Rolex Spring provides complete engineering support
MPS/Rolex Spring utilizes complete in-house manufacturing
MPS/Rolex Spring manufactures springs in high carbon steel,
stainless steel, Inconel and beryllium copper
MPS/Rolex Spring manufactures springs from 1/4" to 40" OD
MPS/Rolex Spring is ISO 9001 registered
For superior products and ser vices, contact MPS/Rolex Spring today for a
free quote on your next project. A convenient quote form – tha t can be
copied and faxed to us – is provided on pa ge 36.

Maryland Precision Spring/ Rolex Spring Division
8900 Kelso Drive
Baltimore, MD 21221
Phone 410.391.7400
Fax 410.687.9223
Web www.mw-ind.com/rolex

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SP SERIES in INCHES and POUNDS

ROLEX NOMINAL DIMENSIONS (Inches) LOAD TORQUE
METRIC
PART BOLT OD ID t REF. REF. FLAT TO FLAT*
NUMBER
NUMBER SIZE OH 1 ) OH 2 ) (Pounds) (Ft-Lb)

M2 SP-52203 0.197 0.087 0.012 0.020 0.016 65 0.1
M2.5 SP-62704 0.236 0.106 0.016 0.026 0.020 146 0.3
M3 SP-73205 1/8 #5 0.276 0.126 0.020 0.030 0.025 210 0.4
M3.5 SP-83705 #6 0.315 0.146 0.020 0.031 0.027 176 0.4
M4 SP-94308 5/32 #8 0.354 0.169 0.031 0.043 0.037 590 1.7
M5 SP-115310 3/16 #10 0.433 0.209 0.039 0.055 0.047 1070 3.7
M6 SP-146412 1/4 0.551 0.252 0.050 0.067 0.056 1390 5.8
M7 SP-177415 0.669 0.291 0.059 0.079 0.070 1800 8.7
M8 SP-188420 5/16 0.709 0.331 0.078 0.102 0.088 4755 26.2
M8 SP-218425 5/16 0.827 0.331 0.098 0.118 0.108 5345 29.5
M10 SP-231120 3/8 0.906 0.413 0.078 0.106 0.094 3200 22.0
M10 SP-241130 3/8 0.945 0.413 0.118 0.140 0.130 8000 55.1
M12 SP-291325 1/2 1.142 0.512 0.098 0.130 0.116 4700 40.1
M12 SP-321335 1/2 1.260 0.512 0.138 0.169 0.156 9900 84.5
M14 SP-351530 9/16 1.378 0.591 0.118 0.157 0.141 6500 64.0
M14 SP-391540 9/16 1.535 0.591 0.157 0.197 0.181 12000 118.2
M16 SP-391735 5/8 1.535 0.669 0.138 0.185 0.162 10000 111.5
M16 SP-421740 5/8 1.654 0.669 0.157 0.204 0.201 13000 145.0
M18 SP-471950 1.850 0.748 0.197 0.244 0.222 20000 249.3
M20 SP-522160 3/4 2.047 0.827 0.236 0.287 0.246 31000 427.3
M22 SP-562360 7/8 2.205 0.906 0.236 0.311 0.268 40276 608.2
M24 SP-622565 2.441 0.984 0.256 0.335 0.291 43600 715.0
M27 SP-702870 1 2.756 1.102 0.276 0.362 0.317 46000 844.9

SP SERIES
M30 SP-773175 1-1/8 3.031 1.220 0.295 0.386 0.343 49000 996.3

inches & pounds
1) When delivered. 2) After first loading. *A ‘K’ factor of .2 was used for the dry tor que calculation. Use .15 if lubricated.
The basic formula used for foot pounds is T = K(D/12)P
(T = torque, K = K factor for the coef ficient of friction, and D = normal bolt diameter).

Important: SP series springs are not pre-stressed. They are designed for static applications only.

TOLERANCE in INCHES Notes:
OD = +.000/-1.5% x OD with a s Parts are typically available in either AISI 1075 / AISI
minimum of .005 6150 spring steel or 17/7 PH stainless steel
ID = -.000/+1.5% ID with a s Inquire about use of other materials (i.e., Inconel 718,
minimum of .005 AISI 301 stainless, etc.)
THICKNESS = thickness is subject to s Part thickness subject to material availability (overall
mil-run tolerances height is adjusted to produce indicated flat load)
OH = is a reference and used to
control the needed load
LOAD = ± 20% of nominal shown
HARDNESS = HRC 43-50 (for AISI 1075 / AISI 6150)
HRC 38-43 (for 17/ 7 PH stainless)

Ask about hardness for other materials.


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CONTACT BELLEVILLE SPRINGS

Contact Belleville springs combine two important that normally occurs during extr eme vibration or
features for impr oved bolt connections. Their conical severe shock.
shape pr ovides a r eactive for ce and a high elasticity
Contact Bellevilles come in sizes that corr espond to a
of spring return to compensate for developed looseness,
wide range of scr ew head sizes, including hex head
loss of bolt tension due to applied surface deterioration,
socket scr ews. They can also be used in SEMS ®
or movement due to thermal expansion and contraction.
assemblies. Made of selected high quality carbon spring
The har dened, serrated pr ofile “grips” the lower
steel, these springs are available with mechanical zinc or
surface of the bolt or nut to pr event the loss of tension
tin plate.

CONTACT “REGULAR”
ROLEX BOLT DIMENSIONS (Inches) Calculated
Metric DIAMETER
No. PART Load @
NUMBER (Inches) Max. OD Min. ID Ref. t Ref. OH Flat*

M3 65-03-11 - 0.315 0.122 0.024 0.039 400
M3.5 65-02-52 #6 0.362 0.142 0.028 0.047 590
M4 65-04-11 #8 0.402 0.161 0.039 0.059 1480
M5 65-05-11 #10 0.481 0.201 0.050 0.073 2420
M6 65-06-12 - 0.559 0.240 0.052 0.087 3350
M6 65-06-15 - 0.559 0.240 0.043 0.067 1210 Typical
M6 65-06-35 1/4 0.559 0.254 0.052 0.087 3450 Use:
M8 65-08-21 5/16 0.717 0.323 0.055 0.095 2680 General
M8 65-08-23 5/16 0.717 0.323 0.035 0.081 760
- 65-09-21 - 0.798 0.362 0.062 0.095 3540 purpose
M10 65-10-22 3/8 0.877 0.402 0.062 0.108 3010
M12 65-12-01 7/16 1.074 0.489 0.078 0.120 3510
M12 65-12-71 1/2 1.074 0.512 0.078 0.120 3600
M14 65-14-42 9/16 1.192 0.567 0.098 0.138 5350
M15 65-16-42 5/8 1.273 0.646 0.098 0.156 7460
M20 65-20-02 3/4 1.570 0.781 0.118 0.185 9000

CONTACT “NARROW”
Metric DIAMETER
No. PART Load @

3 55-03-01 - 0.244 0.122 0.024 0.037 700 Typical use:
3 55-03-51 #6 0.284 0.140 0.028 0.043 930 In the
4 55-04-01 #8 0.323 0.162 0.032 0.045 900 confined
5 55-05-01 #10 0.402 0.201 0.039 0.059 1700
6 55-06-01 - 0.481 0.240 0.050 0.071 2500 space under
- 55-07-21 9/32 0.559 0.284 0.055 0.081 3200 a socket
8 55-08-01 5/16 0.638 0.323 0.055 0.095 3800 head screw
10 55-10-21 3/8 0.798 0.402 0.062 0.095 2700
12 55-12-41 7/16 0.955 0.489 0.062 0.102 2300
CONTACT SPRINGS

CONTACT “WIDE”
Metric DIAMETER
No. PART Load @

3 75-03-12 - 0.402 0.122 0.024 0.047 360
Typical use: For
4 75-04-12 #8 0.559 0.161 0.039 0.071 1120 oversized holes
5 75-05-12 #10 0.638 0.201 0.050 0.085 1820 in sheet metal
6 75-06-14 - 0.717 0.240 0.055 0.100 2780 applications,
6 75-06-36 1/4 0.717 0.254 0.055 0.100 2810
8 75-08-22 5/16 0.877 0.323 0.055 0.095 1610 making use of
10 75-10-23 3/8 1.074 0.402 0.062 0.112 1980 a wide bearing
12 75-12-32 - 1.273 0.488 0.069 0.138 2780 surface
12 75-12-72 1/2 1.273 0.512 0.069 0.138 2820

* NOTE: Contact tolerances are as sta ted and loads indicated are computed. Actual loads obtained in practice can
vary as much as 25% due to fluctua tion in overall height tolerances.


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BELLEVILLE SPRINGS
TO MILITARY SPECIFICATIONS MIL-W-12133/D
(Spring Tension Washers)

Material
MIL-W-12133/1 for spring steel (i.e. C 1075),
MIL-W-12133/2 for stainless steel (T302 or 17-7)

MIL-W-12133/1C MIL-W-12133/2B
AISI 1075 SPRING STEEL 17/7 PH or 301/302 STAINLESS STEEL
(includes magnetic particle inspection and decarb testing) (includes passivation and dye penetrant inspection)
ROLEX ROLEX
DASH DASH
PART OD ID t OH PART OD ID t OH
NUMBER NUMBER
NUMBER NUMBER
M12133/1-62 62 0.250 0.125 0.009 0.017 M12133/2-93 093 0.187 0.093 0.010 0.015
M12133/1-1 1 0.250 0.125 0.013 0.020 M12133/2-125 125 0.250 0.125 0.013 0.020
M12133/1-69 69 0.315 0.125 0.012 0.022 M12133/2-156 156 0.312 0.156 0.017 0.025
M12133/1-60 60 0.281 0.138 0.015 0.023 M12133/2-190 190 0.375 0.190 0.020 0.030
M12133/1-2 2 0.312 0.156 0.017 0.025 M12133/2-200 200 0.375 0.190 0.015 0.027
M12133/1-61 61 0.343 0.164 0.016 0.023 M12133/2-255 255 0.500 0.255 0.025 0.038
M12133/1-63 63 0.375 0.195 0.020 0.030 M12133/2-400 400 0.625 0.317 0.022 0.042
M12133/1-3 3 0.375 0.195 0.015 0.027 M12133/2-317 317 0.625 0.317 0.032 0.048
M12133/1-4 4 0.500 0.258 0.020 0.036 M12133/2-380 380 0.750 0.380 0.040 0.059
M12133/1-64 64 0.500 0.258 0.018 0.034 M12133/2-505 505 1.000 0.505 0.050 0.075
M12133/1-5 5 0.625 0.317 0.032 0.051 M12133/2-567 567 1.125 0.567 0.056 0.084
M12133/1-65 65 0.750 0.382 0.028 0.050 M12133/2-630 630 1.250 0.630 0.062 0.092
M12133/1-6 6 0.750 0.382 0.032 0.054 M12133/2-755 755 1.500 0.755 0.045 0.093
M12133/1-66 66 0.750 0.382 0.040 0.059 M12133/2-100 100 2.000 1.000 0.065 0.130
M12133/1-68 68 0.875 0.442 0.045 0.067 M12133/2-900 900 2.500 1.250 0.125 0.180
M12133/1-7 7 1.000 0.445 0.035 0.067
M12133/1-67 67 1.000 0.505 0.050 0.075
M12133/1-8 8 1.000 0.512 0.039 0.075
M12133/1-9 9 1.102 0.512 0.049 0.083
M12133/1-10 10 1.375 0.637 0.059 0.102
M12133/1-11 11 1.500 0.761 0.059 0.114
M12133/1-12 12 1.500 0.761 0.078 0.121
M12133/1-13 13 1.750 0.880 0.089 0.128
M12133/1-14 14 2.000 1.016 0.079 0.136
M12133/1-15 15 2.373 1.016 0.098 0.137

EXAMPLE: FINISH CODES:
M12133 / 1 1 P
(apply to all MIL spec springs)
- -

MIL SPEC SPRINGS
P Electro-deposited cadmium (per QQ-P-416 Type II Class 2)
Rolex Material Dash Number Finish (if any)
Part (type 1 for steel; size in inches (see chart for M Mechanically-deposited cadmium (per MIL-C-81562 Type II Class 2)
Number type 2 for stainless) (see chart) finish codes) Z Either mechanical zinc with supplementar y chromate
(per MIL-C-81562 Type II Class 2) or electro-deposited zinc
(per ASTM B633, Fe/Zn 13, Type II)
PART NUMBER SYSTEM
The part number consists of the Role x part number, followed by the material
NOTE: If finish spec code is blank, part is supplied as plain.
number (1 or 2), then a “Dash Number” and a finish code letter.

For example, M12133 / 1 - 1 - P, indicates:
C1075 steel .250 OD x .125 ID x .013 thk x .020 OH with electro cadmium plating


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FL SERIES DISC SPRINGS FOR FLANGE APPLICA TIONS
inches & pounds - mm & newtons

Flange disc springs ar e pr ecision machined on all stacked on each end of the bolt depending on estimated
surfaces with well rounded edges and are used single or bolt elongation.
in INCHES and POUNDS
FL SERIES

ROLEX NOMINAL DIMENSIONS (Inches) LOAD DRY TORQUE*
PART BOLT OD ID t REF. @ FLAT TO FLAT
NUMBER SIZE OH (Lbs) (Ft-Lb)

FL-388 3/8 0.714 0.390 0.080 0.086 1200 8
FL-716 7/16 0.820 0.452 0.080 0.097 2800 20
FL-889 1/2 0.900 0.515 0.089 0.100 2100 18
FL-10125 5/8 1.145 0.656 0.125 0.143 6000 63
FL-12131 3/4 1.365 0.781 0.131 0.150 5100 64
FL-14160 7/8 1.585 0.906 0.160 0.180 7100 104
FL-16168 1 1.805 1.032 0.168 0.195 8600 143
FL-18187 1-1/8 2.020 1.156 0.187 0.217 10600 199
FL-20190 1-1/4 2.240 1.281 0.190 0.225 10500 219
FL-22250 1-3/8 2.450 1.406 0.250 0.290 23000 527
FL-24250 1-1/2 2.680 1.531 0.250 0.290 19000 475
FL-26262 1-5/8 2.960 1.687 0.262 0.307 20000 542
FL-28281 1-3/4 3.170 1.812 0.281 0.329 23000 671
FL-30300 1-7/8 3.380 1.937 0.300 0.353 28000 875
FL-32318 2 3.600 2.062 0.318 0.375 32000 1067
FL-36356 2-1/4 4.040 2.312 0.356 0.418 39000 1463
FL-40394 2-1/2 4.470 2.562 0.394 0.464 48000 2000

in MM and NEWTONS
ROLEX NOMINAL METRIC DIMENSIONS (MM) LOAD DRY TORQUE*
PART BOLT OD ID t REF. @ FLAT TO FLAT
NUMBER SIZE OH (Newtons) (Newtons/Meter**)
MFL-8050 8 15 8.4 1.25 1.70 6000 9.6
MFL-8078 8 15 8.4 2.00 2.30 17000 27.2
MFL-10078 10 18 10.4 2.00 2.30 11000 22.0
MFL-12090 12 22 12.4 2.30 2.60 13000 31.2
MFL-14098 14 25 14.4 2.50 2.95 18000 50.4
MFL-20160 20 36 20.8 4.00 4.60 43000 172.0
MFL-24160 24 43 24.8 4.00 4.80 39000 187.2
MFL-27168 27 49 27.8 4.30 5.00 40000 216.0
MFL-30190 30 54 30.8 4.80 5.60 42000 252.0
MFL-36250 36 68 36.8 6.40 7.50 92000 662.4
MFL-39250 39 70 39.6 6.40 7.50 91000 709.8

*A ‘K’ factor of .2 was used for the dry tor que calculation. Use .15 if lubricated. The basic formula used for foot pounds is T = K(D/12)P.
**The basic metric formula used for Newtons per meter is T = K(D/1000)P
(T = torque, K = K factor for the coef ficient of friction, and D = normal bolt diameter)

TOLERANCE
OD = +.000/-1.5% x OD
Minimum FL OD is .005 inch and minimum MFL OD is 0.13 MM
(designed for standard flange spot face diameter)
ID = -.000/+1.5% ID
Minimum FL ID is .005 inch and minimum MFL ID is 0.13 MM
THICKNESS = ± 5% x nominal thickness shown
OH = is a reference and used to control the needed load

MATERIAL
STAINLESS = 17/7 PH (Armco) precipitation hardened
HARDNESS = Rc 40-45 for ID < 1.250 inches
Rc 38-42 for ID ≥ 1.250 inches
TEMP. RANGE = - 220ºC to + 300ºC
For higher temperatures – to +600ºC, we can supply Inconel 718
(Inconel X-750 is non-standard)


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NDS SERIES FLANGE DISC SPRINGS

NDS flange disc springs ar e “live loaded” springs that National Disc Spring H11/H13 steel flange disc springs
can be used single or stacked (depending on estimated are designed to meet specific bolt str ess requirements:
bolt elongation) and offer the following features:
PARTS BOLT
s Maintain bolt tension and gasket pressure around the ENDING STRESS
flange under conditions of thermal variations or IN PSI
mechanical shock that may disturb the bolted joint. -60 60,000
s Eliminate resultant flange leaks. -45 45,000
s They counteract loosening and assure the integrity of -30 30,000
the bolted flange under the most sever e conditions.
TOLERANCE
s The proper use of NDS flange discs will ensur e that
gasketed joints will not leak and completely maintain OD = +.000/-1.5% x OD
the seal, r educing pollution, ensuring safety and (designed for standard flange
reduce pipe line down time. spot face diameter)
ID = -.000/+1.5% ID
The flange disc spring automatically adjusts for thermal Minimum FL ID is .005 inch and
variation, vibration and mechanical shock str ess. Hence minimum MFL ID is 0.13 MM
we call the flange “live loaded”. THICKNESS = ± 5% x nominal thickness shown
OH = is a reference and used to control
Material used is H11/H13 high temperature material that
the needed load
can under most conditions withstand temperatur es in

NDS SERIES
the range of 1100°F (590°C). All parts ar e heat tr eated,
HRc = 40-45
with a plain finish.

inches & pounds
ROLEX NOMINAL DIMENSIONS (Inches) LOAD DRY TORQUE
DEFLECTION
PART BOLT @ FLAT TORQUE* LUBED
OD ID t @ FLAT
NUMBER SIZE (Lbs) (Ft-Lb) (Ft-Lb)

NDS-3-60 3/4 1.370 0.773 0.224 0.015 20,000 250 188
NDS-3-45 3/4 1.370 0.773 0.220 0.012 15,000 188 141
NDS-3-30 3/4 1.370 0.773 0.190 0.013 9,700 121 91
NDS-4-60 7/8 1.590 0.901 0.280 0.015 28,000 408 306
NDS-4-45 7/8 1.590 0.901 0.265 0.013 20,000 292 219
NDS-4-30 7/8 1.590 0.901 0.220 0.015 13,000 190 142
NDS-5-60 1 1.810 1.030 0.316 0.018 36,000 600 450
NDS-5-45 1 1.810 1.030 0.305 0.015 27,000 450 338
NDS-5-30 1 1.810 1.030 0.260 0.016 18,000 300 225
NDS-6-60 1-1/8 2.025 1.155 0.370 0.018 47,000 881 661
NDS-6-45 1-1/8 2.025 1.155 0.345 0.017 35,000 656 492
NDS-6-30 1-1/8 2.025 1.155 0.285 0.020 23,000 431 323
NDS-7-60 1-1/4 2.310 1.281 0.405 0.023 60,000 1,250 938
NDS-7-45 1-1/4 2.310 1.281 0.395 0.019 45,000 938 703
NDS-7-30 1-1/4 2.310 1.281 0.325 0.023 30,000 625 469
NDS-8-60 1-3/8 2.470 1.406 0.446 0.024 74,000 1,696 1,272
NDS-8-45 1-3/8 2.470 1.406 0.440 0.019 55,000 1,260 945
NDS-8-30 1-3/8 2.470 1.406 0.358 0.023 36,000 825 619
NDS-9-60 1-1/2 2.680 1.531 0.513 0.024 89,000 2,225 1,669
NDS-9-45 1-1/2 2.680 1.531 0.503 0.025 79,000 1,975 1,481
NDS-9-30 1-1/2 2.680 1.531 0.400 0.024 44,000 1,100 825
NDS-10-60 1-5/8 2.950 1.649 0.542 0.028 106,000 2,871 2,153
NDS-10-45 1-5/8 2.950 1.649 0.513 0.025 80,000 2,167 1,625
NDS-10-30 1-5/8 2.950 1.649 0.436 0.027 53,000 1,435 1,077
NDS-11-60 1-3/4 3.170 1.774 0.593 0.029 125,000 3,646 2,734
NDS-11-45 1-3/4 3.170 1.774 0.550 0.027 92,000 2,683 2,013

*A ‘K’ factor of .2 was used for the dry tor que calculation. Use .15 if lubricated.
The basic formula used is T = K(D/12)P


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NDS SERIES DISC SPRINGS
ROLEX NOMINAL DIMENSIONS (Inches) LOAD DRY TORQUE
DEFLECTION
PART BOLT @ FLAT TORQUE* LUBED
OD ID t @ FLAT
NUMBER SIZE (Lbs) (Ft-Lb) (Ft-Lb)

NDS-11-30 1-3/4 3.170 1.774 0.470 0.029 60,000 1,750 1,313
NDS-12-60 1-7/8 3.389 1.899 0.618 0.030 128,000 4,000 3,000
NDS-12-45 1-7/8 3.389 1.899 0.597 0.028 107,000 3,344 2,508
NDS-12-30 1-7/8 3.389 1.899 0.510 0.030 70,000 2,188 1,641
NDS-13-60 2 3.600 2.024 0.636 0.032 132,000 4,400 3,300
NDS-13-45 2 3.600 2.024 0.628 0.031 120,000 4,000 3,000
NDS-13-30 2 3.600 2.024 0.545 0.032 83,000 2,767 2,075
NDS-14-60 2-1/4 4.040 2.281 0.725 0.036 169,000 6,338 4,753
NDS-14-45 2-1/4 4.040 2.281 0.716 0.032 155,000 5,813 4,359
NDS-14-30 2-1/4 4.040 2.281 0.615 0.036 105,000 3,938 2,953
NDS-15-60 2-1/2 4.483 2.531 0.810 0.038 210,000 8,750 6,563
NDS-15-45 2-1/2 4.483 2.531 0.795 0.038 196,000 8,167 6,125
NDS-15-30 2-1/2 4.483 2.531 0.695 0.038 130,000 5,417 4,063
NDS-16-60 2-3/4 4.920 2.781 0.880 0.045 260,000 11,917 8,938
NDS-16-45 2-3/4 4.920 2.781 0.875 0.042 240,000 11,000 8,250
NDS-16-30 2-3/4 4.920 2.781 0.755 0.045 164,000 7,517 5,638
NDS-17-60 3 5.360 3.031 0.984 0.046 310,000 15,500 11,625
NDS-17-45 3 5.360 3.031 0.975 0.042 290,000 14,500 10,875
NDS-17-30 3 5.360 3.031 0.835 0.046 190,000 9,500 7,125

*A ‘K’ factor of .2 was used for the dry tor que calculation. Use .15 if lubricated.
The basic formula used is T = K(D/12)P
NDS SERIES
inches & pounds

DID YOU KNOW...

The MPS/Rolex Spring’ s manufacturing facility in MPS/Rolex Spring is a part of the MW Industries
Baltimore, Maryland provides complete control over family – the leader in fastener and spring
all aspects of pr oduction. MPS/Rolex Spring manufacture and technology. This proud partnership
capabilities include tooling, stamping, machining, provides MPS/Rolex Spring access to state-of-the-
heat treating and finishing. art fastener and spring technologies and services
nationwide.

Maryland Precision Spring/ Rolex Spring Division Ph 410.391.7400 • Fx 410.687.9223
8900 Kelso Drive, Baltimore, MD 21221 Web www.mw-ind.com/rolex

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AK SERIES DISC SPRINGS FOR USE WITH BALL BEARINGS

AK series disc springs ar e specially designed as Loads for the AK series have a tolerance of ± 20% of
preloading springs for use with radial ball bearings. They loads indicated.
help maintain positioning accuracy of the bearing with no
end play . They also minimize vibration and shaft Hardness = Rockwell C 40-51
deflection. Pr oper pr eloading will incr ease bearing
rigidity and eliminate excessive running noise.

LOOKUP TABLES
BALL ROLEX BALL ROLEX BALL ROLEX BALL ROLEX
BEARING PART BEARING PART BEARING PART BEARING PART
SIZE NUMBER SIZE NUMBER SIZE NUMBER SIZE NUMBER

607 AK-607 6017 AK-6017 6220 AK-6024 6315 AK-6315
608 AK-608 6018 AK-6018 6221 AK-6221 6316 AK-6316
609 AK-609 6020 AK-6020 6222 AK-6026 6317 AK-6317
623 AK-623 6021 AK-6021 6224 AK-6224 6318 AK-6318
624 AK-624 6022 AK-6022 6226 AK-6226 6319 AK-6319
625 AK-625 6024 AK-6024 6228 AK-6228 6320 AK-6224
626 AK-626 6026 AK-6026 6230 AK-6230 6321 AK-6030
627 AK-608 6030 AK-6030 6232 AK-6232 6322 AK-6322
629 AK-6000 6200 AK-6200 6234 AK-6234 6324 AK-6324
634 AK-625 6201 AK-6002 6236 AK-6236 6328 AK-6328
635 AK-626 6202 AK-6003 6236 AK-6236 6330 AK-6236
6000 AK-6000 6203 AK-6203 6238 AK-6238 6332 AK-6238
6001 AK-6001 6204 AK-6005 6240 AK-6240 6334 AK-6240
6002 AK-6002 6205 AK-6205 6300 AK-6300
6003 AK-6003 6206 AK-6007 6301 AK-6301 EL-3 AK-623
6004 AK-6004 6207 AK-6207 6302 AK-6004 EL-4 AK-624
6005 AK-6005 6208 AK-6010 6303 AK-6005 EL-5 AK-625
6006 AK-6006 6209 AK-6209 6304 AK-6205 EL-6 AK-626
6007 AK-6007 6210 AK-6011 6305 AK-6007 EL-7 AK-607
6008 AK-6008 6211 AK-6013 6306 AK-6306 EL-8 AK-608
6009 AK-6009 6212 AK-6014 6307 AK-6307 EL-9 AK-609
6010 AK-6010 6213 AK-6213 6308 AK-6308
6011 AK-6011 6214 AK-6016 6309 AK-6309 R-10 AK-R10
6012 AK-6012 6215 AK-6017 6310 AK-6310 R-2 AK-R2
6013 AK-6013 6216 AK-6018 6311 AK-6311 R-3 AK-R3
AK SERIES
6014 AK-6014 6217 AK-6020 6312 AK-6312 R-4 AK-R4
6015 AK-6015 6218 AK-6021 6313 AK-6313 R-6 AK-R6
6016 AK-6016 6219 AK-6022 6314 AK-6314 R-8 AK-R8


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AK SERIES in MM and KGF

ROLEX BALL DIMENSIONS (MM) DEFLECTION @ f = .75h
PART BEARING h/t LOAD
OD ID t h OH MM
NUMBER SIZE (KGF)
AK-R2 R-2 9.3 5.8 0.20 0.20 0.40 1.00 2.7 0.15
AK-623 623 EL-3 9.8 6.2 0.20 0.20 0.40 l.00 2.4 0.15
AK-R3 R-3 12.5 8.1 0.25 0.25 0.50 1.00 3.8 0.19
AK-624 624 EL-4 12.8 7.2 0.25 0.25 0.50 l.00 3.0 0.19
AK-R4 R-4 15.7 10.3 0.25 0.31 0.55 1.24 3.1 0.23
AK-625 625 634 EL-5 15.8 8.2 0.25 0.30 0.55 1.20 2.4 0.23
AK-626 626 635 EL-6 18.8 9.2 0.30 0.35 0.65 1.17 3.3 0.26
AK-607 607 EL-7 18.8 10.2 0.35 0.35 0.70 1.00 5.4 0.26
AK-608 608 627 EL-8 21.8 12.3 0.35 0.40 0.75 1.14 4.9 0.30
AK-R6 R-6 21.9 13.7 0.35 0.40 0.75 1.14 5.4 0.30
AK-609 609 EL-9 23.7 14.3 0.40 0.50 0.90 1.25 8.4 0.38
AK-6000 6000 629 25.7 14.3 0.40 0.50 0.90 1.25 6.6 0.38
AK-6001 6001 27.7 17.3 0.40 0.60 1.00 1.50 8.3 0.45
AK-R8 R-8 28.2 18.4 0.40 0.71 1.10 1.77 10.9 0.53
AK-6200 6200 29.7 17.4 0.40 0.70 1.10 1.75 8.6 0.53
AK-6002 6002 6201 31.7 20.4 0.40 0.70 1.10 1.75 8.4 0.53
AK-R10 R-10 34.5 25.4 0.50 0.70 0.70 1.40 15.8 0.53
AK-6300 6300 34.6 20.4 0.40 0.70 1.10 1.75 6.4 0.53
AK-6003 6003 6202 34.6 22.4 0.50 0.70 1.20 1.40 12.4 0.53
AK-6301 6301 36.6 20.4 0.50 0.80 1.30 1.60 11.6 0.60
AK-6203 6203 39.6 25.5 0.50 0.80 1.30 1.60 11.5 0.60
AK-6004 6004 6302 41.6 25.5 0.50 0.90 1.40 1.80 11.8 0.68
AK-6005 6005 6204 6303 46.5 30.5 0.60 0.91 1.50 1.52 16.0 0.68
AK-6205 6205 6304 51.5 35.3 0.60 0.91 1.50 1.52 14.1 0.68
AK-6006 6006 54.5 40.5 0.60 0.91 1.50 1.52 14.7 0.68
AK-6007 6007 6206 6305 61.5 40.5 0.70 1.10 1.80 l.57 18.3 0.83
AK-6008 6008 67.5 50.5 0.70 l.00 1.70 1.43 16.8 0.75
AK-6306 6306 71.5 45.5 0.70 1.40 2.10 2.00 19.3 1.05
AK-6207 6207 71.5 50.5 0.70 1.41 2.10 2.01 22.8 1.05
AK-6009 6009 74.5 55.5 0.80 1.11 1.90 1.39 22.0 0.83
AK-6307 6307 79.5 50.5 0.80 1.51 2.30 1.89 23.7 1.13
AK-6010 6010 6208 79.5 55.5 0.80 1.51 2.30 1.89 27.5 1.13
AK-6209 6209 84.5 60.5 0.90 1.61 2.50 1.79 37.4 1.21
AK-6308 6308 89.5 60.5 0.90 1.61 2.50 1.79 29.9 I .20
AK-6011 6011 6210 89.5 65.5 0.90 1.61 2.50 1.79 34.9 1.21
AK-6012 6012 94.5 75.5 1.00 1.21 2.20 1.21 33.9 0.91
AK-6309 6309 99.0 65.5 1.00 1.60 2.60 1.60 30.4 1.20
AK-6013 6013 6211 99.0 70.5 1.00 1.61 2.60 1.61 34.7 1.21
AK-6310 6310 109.0 70.5 1.25 1.45 2.70 1.16 37.1 1.09
AK-6014 6014 6212 109.0 75.5 1.25 1.46 2.70 1.16 41.3 1.09
AK-6015 6015 114.0 90.5 1.25 1.21 2.45 0.97 41.5 0.91
AK-6311 6311 119.0 75.5 1.25 1.55 2.80 1.24 33.1 1.16
AK-6213 6213 119.0 85.5 1.25 1.55 2.80 1.24 40.7 1.17
AK-6016 6016 6214 124.0 90.5 1.25 1.76 3.00 1.41 46.2 1.32
AK-6312 6312 129.0 85.5 1.25 1.96 3.20 l.57 42.0 1.47
AK-6017 6017 6215 129.0 95.5 1.25 1.96 3.20 l.57 52.0 1.47
AK-6313 6313 139.0 90.5 1.25 2.01 3.25 1.61 36.7 1.50
AK SERIES

AK-6018 6018 6216 139.0 101.0 1.25 2.01 3.25 1.61 44.6 1.51
AK-6314 6314 149.0 95.5 1.50 1.70 3.20 1.13 39.4 1.28
AK-6020 6020 6217 149.0 106.0 1.50 1.70 3.20 1.13 46.7 1.28
mm & kgf

AK-6315 6315 159.0 101.0 l.50 2.00 3.50 1.33 42.8 1.50
AK-6021 6021 6218 159.0 111.0 1.50 2.00 3.50 1.33 49.5 1.50
AK-6316 6316 169.0 111.0 1.50 2.30 3.80 1.53 48.8 1.73
AK-6022 6022 6219 169.0 121.0 1.50 2.31 3.80 1.54 56.7 1.73
AK-6317 6317 179.0 121.0 2.00 2.21 4.20 1.11 89.7 1.66
AK-6024 6024 6220 179.0 126.0 2.00 2.21 4.20 1.11 96.4 1.66
AK-6318 6318 189.0 121.0 2.00 2.31 4.30 1.16 78.6 1.73


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AK SERIES in MM and KGF

ROLEX BALL DIMENSIONS (MM) DEFLECTION @ f = .75h
OD ID t h OH MM
NUMBER SIZE (KGF)
AK-6221 6221 189.0 131.0 2.00 2.31 4.30 1.16 89.0 1.73
AK-6319 6319 198.0 131.0 2.00 2.51 4.50 1.26 84.1 1.88
AK-6026 6026 6222 198.0 141.0 2.00 2.51 4.50 1.26 95.7 1.88
AK-6224 6224 6320 213.0 151.0 2.25 2.26 4.50 1.00 97.6 1.69
AK-6030 6030 6321 223.0 161.0 2.25 2.36 4.60 1.05 97.7 1.77
AK-6226 6226 228.0 161.0 2.25 2.71 4.95 1.20 107.5 2.03
AK-6322 6322 238.0 161.0 2.25 3.01 5.25 1.34 105.9 2.26
AK-6228 6228 248.0 171.0 2.50 2.51 5.00 l.00 104.0 1.88
AK-6324 6324 258.0 171.0 2.50 3.04 5.50 1.20 114.5 2.25
AK-6230 6230 268.0 181.0 2.50 3.21 5.70 1.28 119.6 2.41
AK-6236 6236 278.0 181.0 2.50 3.51 6.00 1.40 119.5 2.63
AK-6232 6232 288.0 191.0 2.75 3.01 5.75 1.09 118.6 2.25
AK-6328 6328 298.0 191.0 2.75 3.61 6.35 1.31 135.4 2.70
AK-6234 6234 308.0 202.0 3.00 3.11 6.10 1.04 134.6 2.33
AK-6236 6236 6330 318.0 212.0 3.00 3.21 6.20 1.07 134.7 2.40
AK-6238 6238 6332 338.0 232.0 3.00 3.61 6.60 1.20 146.3 2.70
AK-6240 6240 6334 358.0 242.0 3.00 4.21 7.20 1.40 158.3 3.16

AK SERIES in INCHES and POUNDS

ROLEX BALL DIMENSIONS (INCHES) DEFLECTION @ f = .75h
OD ID t h OH
NUMBER SIZE INCHES
(POUNDS)
AK-R2 R-2 0.366 0.228 0.008 0.008 0.016 1.010 5.9 0.006
AK-623 623 EL-3 0.386 0.244 0.008 0.008 0.016 1.010 5.4 0.006
AK-R3 R-3 0.492 0.319 0.010 0.010 0.020 1.020 8.3 0.008
AK-624 624 EL-4 0.504 0.283 0.010 0.010 0.020 1.010 6.7 0.008
AK-R4 R-4 0.618 0.406 0.010 0.012 0.022 1.220 6.8 0.009
AK-625 625 634 EL-5 0.622 0.323 0.010 0.012 0.022 1.220 5.3 0.009
AK-626 626 635 EL-6 0.740 0.362 0.012 0.014 0.026 1.170 7.2 0.010
AK-607 607 EL-7 0.740 0.402 0.014 0.014 0.028 1.000 11.8 0.010
AK-608 608 627 EL-8 0.858 0.484 0.014 0.016 0.030 1.140 10.7 0.012
AK-R6 R-6 0.862 0.539 0.014 0.016 0.030 1.140 11.8 0.012
AK-609 609 EL-9 0.933 0.563 0.016 0.020 0.035 1.260 18.5 0.015
AK-6000 6000 629 1.012 0.563 0.016 0.020 0.035 1.260 14.5 0.015
AK-6001 6001 1.091 0.681 0.016 0.024 0.039 1.520 18.4 0.018
AK-R8 R-8 1.110 0.724 0.016 0.028 0.043 1.770 24.1 0.021
AK-6200 6200 1.169 0.685 0.016 0.028 0.043 1.770 19.0 0.021
AK-6002 6002 6201 1.248 0.803 0.016 0.028 0.043 1.770 18.6 0.021
AK-R10 R-10 1.358 1.000 0.020 0.028 0.047 1.410 34.8 0.021
AK-6300 6300 1.362 0.803 0.016 0.028 0.043 1.760 14.1 0.021
AK-6003 6003 6202 1.362 0.882 0.020 0.028 0.047 1.400 27.3 0.021

mm & kgf - inches & pounds
AK-6301 6301 1.441 0.803 0.020 0.032 0.051 1.600 25.5 0.024
AK-6203 6203 1.559 1.004 0.020 0.032 0.051 1.610 25.3 0.024 AK SERIES
AK-6004 6004 6302 1.638 1.004 0.020 0.036 0.055 1.800 26.1 0.027
AK-6005 6005 6204 6303 1.831 1.201 0.024 0.036 0.059 1.510 35.3 0.027
AK-6205 6205 6304 2.028 1.398 0.024 0.036 0.059 1.510 31.1 0.027
AK-6006 6006 2.146 1.594 0.024 0.036 0.059 1.510 32.5 0.027
AK-6007 6007 6206 6305 2.421 1.594 0.028 0.043 0.071 1.570 40.3 0.033
AK-6008 6008 2.657 1.988 0.028 0.040 0.067 1.430 37.1 0.030
AK-6306 6306 2.815 1.791 0.028 0.055 0.083 2.000 42.5 0.041
AK-6207 6207 2.815 1.988 0.028 0.055 0.083 2.010 50.3 0.042
AK-6009 6009 2.933 2.185 0.032 0.044 0.075 1.380 48.5 0.033
AK-6307 6307 3.130 1.988 0.032 0.059 0.091 1.880 52.2 0.045


25


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AK SERIES in INCHES and POUNDS

ROLEX BALL DIMENSIONS (INCHES) DEFLECTION @ f = .75h
PART BEARING h/t
OD ID t h OH LOAD
NUMBER SIZE INCHES
(POUNDS)
AK-6010 6010 6208 3.130 2.185 0.032 0.059 0.091 1.880 60.6 0.045
AK-6209 6209 3.327 2.382 0.035 0.063 0.098 1.790 82.4 0.048
AK-6308 6308 3.524 2.382 0.035 0.063 0.098 1.790 65.9 0.047
AK-6011 6011 6210 3.524 2.579 0.035 0.063 0.098 1.790 76.9 0.048
AK-6012 6012 3.720 2.972 0.039 0.048 0.087 1.210 74.8 0.036
AK-6309 6309 3.898 2.579 0.039 0.063 0.102 1.600 67.1 0.047
AK-6013 6013 6211 3.898 2.776 0.039 0.063 0.102 1.610 76.4 0.047
AK-6310 6310 4.291 2.776 0.049 0.057 0.106 1.160 81.7 0.043
AK-6014 6014 6212 4.291 2.972 0.049 0.057 0.106 1.160 91.1 0.043
AK-6015 6015 4.488 3.563 0.049 0.048 0.097 0.970 91.4 0.036
AK-6311 6311 4.685 2.972 0.049 0.061 0.110 1.240 73.0 0.046
AK-6213 6213 4.685 3.366 0.049 0.061 0.110 1.240 89.8 0.046
AK-6016 6016 6214 4.882 3.563 0.049 0.069 0.118 1.410 101.9 0.052
AK-6312 6312 5.079 3.366 0.049 0.077 0.126 1.570 92.7 0.058
AK-6017 6017 6215 5.079 3.760 0.049 0.077 0.126 1.570 114.7 0.058
AK-6313 6313 5.472 3.563 0.049 0.079 0.128 1.610 80.9 0.059
AK-6018 6018 6216 5.472 3.976 0.049 0.079 0.128 1.610 98.4 0.059
AK-6314 6314 5.866 3.760 0.059 0.067 0.126 1.130 86.8 0.050
AK-6020 6020 6217 5.866 4.173 0.059 0.067 0.126 1.140 103.0 0.050
AK-6315 6315 6.260 3.976 0.059 0.079 0.138 1.330 94.3 0.059
AK-6021 6021 6218 6.260 4.370 0.059 0.079 0.138 1.340 109.2 0.059
AK-6316 6316 6.654 4.370 0.059 0.091 0.150 1.530 107.5 0.068
AK-6022 6022 6219 6.654 4.764 0.059 0.091 0.150 1.540 125.0 0.068
AK-6317 6317 7.047 4.764 0.079 0.087 0.165 1.110 197.7 0.065
AK-6024 6024 6220 7.047 4.961 0.079 0.087 0.165 1.110 212.5 0.065
AK-6318 6318 7.441 4.764 0.079 0.091 0.169 1.150 173.3 0.068
AK-6221 6221 7.441 5.157 0.079 0.091 0.169 1.150 196.1 0.068
AK-6319 6319 7.795 5.157 0.079 0.099 0.177 1.250 185.5 0.074
AK-6026 6026 6222 7.795 5.551 0.079 0.099 0.177 0.060 211.0 0.074
AK-6224 6224 6320 8.386 5.945 0.089 0.089 0.177 1.000 215.2 0.067
AK-6030 6030 6321 8.780 6.339 0.089 0.093 0.181 1.050 215.3 0.070
AK-6226 6226 8.976 6.339 0.089 0.107 0.195 1.200 237.0 0.080
AK-6322 6322 9.370 6.339 0.089 0.118 0.207 1.340 233.4 0.089
AK-6228 6228 9.764 6.732 0.098 0.099 0.197 1.000 229.3 0.074
AK-6324 6324 10.157 6.732 0.098 0.118 0.217 1.200 252.5 0.089
AK-6230 6230 10.551 7.126 0.098 0.126 0.224 1.280 263.6 0.095
AK-6236 6326 10.945 7.126 0.098 0.138 0.236 1.400 263.5 0.104
AK-6232 6232 11.339 7.520 0.108 0.118 0.226 1.090 261.5 0.089
AK-6328 6328 11.732 7.520 0.108 0.142 0.250 1.310 298.6 0.107
AK-6234 6234 12.126 7.953 0.118 0.122 0.240 1.040 296.7 0.092
AK-6236 6236 6330 12.520 8.346 0.118 0.126 0.244 1.070 297.0 0.095
AK-6238 6238 6332 13.307 9.134 0.118 0.142 0.260 1.200 322.5 0.107
AK-6240 6240 6334 14.094 9.528 0.118 0.166 0.284 1.400 348.9 0.124

MPS/Rolex Spring manufactures parts for the following industries...
AK SERIES
inches & pounds

Aerospace
Transportation
Material Handling
Chemical Processing
Electrical Connectors
Oil Field Equipment
Machine Tools
Mining
Valves
and more!

26


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APPLICATIONS

Valve Actuator Assembly Shock Absorbing Bolted Assembly

APPLICATIONS
Punch Stripper Assembly
Fail-Safe Brake Assembly

Pipe Hold-Down Assembly

Cable Support Assembly

Limiting Brake

Shock Absorber Assembly for Drill Bit

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APPLICATIONS

Live Load Assembly Clutch Assembly
APPLICATIONS

Die Seat Assembly Traction Drive Assembly

High Pressure Valve Valve Packing Assembly

Disc springs can achieve the same loads as helical
springs in much less space. Disc spring stacks can be
designed for extr emely high loads wher e coil springs
would not be feasible.

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THEORETICAL VS MEASURED CHARACTERISTIC OF A DISC SPRING

MPS/Rolex Spring uses a computerized design pr ogram GRAPH FOR AM 502520
that enables the engineer to quickly design specific disc (50 mm x 25.4 x 2.0 x 3.4 OH)
spring systems for custom applications. Contact us for
800
design assistance.

The characteristics of an individual disc spring ar e non-
linear. The shape of the load - deflection curve depends MEASURED CHARACTERISTIC
on the constant C=h/t. 600
THEORETICAL CHARACTERISTIC

KG
In the lower portion of the deflection range, the load in
practice departs slightly from the theoretical.
400
When f/h > 0.75, the load in practice again departs

f = 0,75h
P
increasingly fr om the theor etical because the disc
springs edges r oll against the supporting surface. This

LOAD
leads to a continuous shortening of the moment arm.
200
SPECIAL CASES OF h/t
The shape of the load - deflection diagram depends on
the ratio of the cone height (h) to the material thickness
(t). If this ratio h/t, is small (up to 0.6) then the shape

DESIGN INFO
0
approximates a straight line. Several examples of shapes 0,2 0,4 0,6 0,8 1,0 1,2 1,4
for specific values of h/t listed below . DEFLECTION f MM

1. Approximate linear h /t < 0.4 2. Regressive h /t ~ 1 3. Constant load h /t = 1.4
300 300 300

200 200
LOAD LB
LOAD LB

200
LOAD LB

100 100 100

0 0 0
.01 .02 .03 .04 .05 .01 .02 .03 .04 .05 .01 .02 .03 .04 .05
TRAVEL INCH TRAVEL INCH TRAVEL INCH

4. Negative type h/t >1.4 5. Progressive (see page 33)
300 300

200 200
LOAD LB
LOAD LB

100 100

0 0
.01 .02 .03 .04 .05 .01 .02 .03 .04 .05
TRAVEL INCH TRAVEL INCH


29

β
β β

410-391-7400
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DISC SPRING LOAD CALCULATIONS
OD Figure 4
P

Radius
Y β Actual R
β Theoretical R sharp corners
R
X Figure 1 A well designed disc spring has radii at all cor ners to r educe
stress concentrations at the edges. A suitable radius is appr ox.
Nomenclature = t/6. This radius further r educes dimension R (see Fig. 4).
OD = Maximum outside dia. (upper surface)
Usually the overall height of the disc spring is specified because
ID = Minimum inside dia. (bottom surface)
h = Conical disc height (cone height) it is easy to measur e and contr ol. The cone height h, on the
OH = Overall height = Y + h other hand, is difficult to measure (see Fig. 5).
t = Actual thickness of disc
β = Cone angle of disc t
R = Radius from centerline to load bearing
circle (bottom surface) Y
M = Ratio factor
μ = Poisson’s ratio (.3 for steel)
OH
Figure 5
E = Young’s modulus (30,000000 for steel) β H
f = Deflection of disc β
α = Ratio of diameters (OD / ID) β
For an approximate calculation, h = (overall height – t) is
P = Load in lbs. at a given deflection
DESIGN INFO

acceptable. However, this is not accurate. In fact, h = (overall
Pf = Load in lbs. at flat
height – Y), where Y = Cos β • t. For small thicknesses (under 2
X = Sin β • t
mm), this is not significant. With thicker disc springs, this
Y = Cos β • t
becomes a major factor for accurate load and str ess
The load deflection formula was developed by J. Almen and A. calculations. This has not been adequately consider ed in
Laszlo, and published in the Transactions of the American previous technical literature.
Society of Mechanical Engineers, May 1936, and is rendered as P
follows: Flat
LOAD IN LBS. AT A GIVEN DEFLECTION OD

β

β

DISC SPRING AT FLAT R
Flat
In the flattened condition, the deflection f is equal to the conical Figure 6
P
height h and the equation becomes:
Disc springs 8 mm and thicker ar e made with a bearing flat at
upper ID and lower OD as standar d (see Fig. 6). This bearing flat
assures mor e uniform loading and better alignment of the disc
OD
To calculate the load accurately, the following important factors stack. The flat is equal appr ox. to 150 load calculations,
. For
must be considered: R must be calculated to the inner edge of the flat.
SUMMARY
Precise load and str ess calculations r equire the determination
of the disc spring angle β. Since this is not easily determined by
Figure 2 Figure 3 physical measur ement, we have developed a computer
β
program that calculates the pr ecise angle and arrives at the
β R R exact dimension for conical height h. This then determines
Disc with theoretical sharp corners accurate load and str ess calculation. When designing special
disc springs and wishing to evaluate the r esultant load and
If the disc spring is made as in Fig. 2, which is unusual, then stress with accuracy , please consult our Engineering
R = OD / 2. Most disc springs ar e made as in Fig. 3. Department.
Therefore, the load bearing radius is not equal to half of the The load and str ess formulas ar e corr ect only with the
maximum outside diameter. To calculate R, the angle β first has assumption that the spring will be worked within the elastic limit
to be determined. of the material.

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DYNAMIC LOADING & FATIGUE LIFE
22
Dynamic loading of disc springs occurs when the load
continuously changes from preload to final load. 20
The “str ess-time” curve of such disc springs which pulsate 18
17.4

MINIMUM, MAXIMUM STRESS LIMIT
uniformly is sinusoidal. This is not true in cases of impact loading CL
ES
16 CY
and therefore it is difficult to predict their life and behavior. ES
4

=1
0 CL
N 4 CY

(final stress psi x 10 4 )
0 ES
x1 CL
Disc spring life may be dif ferentiated into 2 categories: 14 N=
5
4
0
CY
1
2x
1) Limited life: where cycles vary without failur e between 40,000 12 N≥
and 2,000,000 cycles.
2) Unlimited life : cycles in excess of 2•10 6 without failur e. For 10
virtually indefinite life, the table below indicates the appropriate
8
values r equired given in per cent of travel, r elating pr eload to
final load AND considering the disc spring thickness. 6
12.4
Max. Deflection 4
Preload in % of h DIAGRAM FOR DISC SPRINGS
2
in % of h Disc Thickness WITH t < .039"
≤ .039" ≥ .157" 0
15 50 44 0 2 4 6 8 10 12 14 16 18 20 22
25 56 49 MINIMUM STRESS LIMIT
(preload stress psi x 10 4 )
50 67 64
FATIGUE LIFE
Fatigue life for disc springs is defined by the ef fective number of 22
stress cycles that can be sustained prior to failur e under certain 20

DESIGN INFO
conditions. This depends on the minimum stress, maximum stress
and stress range. 18

ES
The diagrams presented here are for evaluating fatigue life of single 16 4 CY
CL
ES
0
disc springs or series stacks not mor e than 6 springs. Ther e ar e N=
1 CL

4 CY
14 1 0 ES
three basic groups, depending on thickness (see legend with each N=
5x 4 CY
CL
10
diagram). 12 N ≥2
x

The horizontal axis represents PRELOAD STRESS. 10
The vertical axis represents FINAL STRESS.
The fatigue life is found at the intersection of these points on the 8
graph. The ZONE in which they fall tells the pr edicted life. If they 6
fall outside the zones, their life is not generally pr edictable.
4
The horizontal bor der line enclosing the top portion of the graph
DIAGRAM FOR DISC SPRINGS
(zone) represents the yield strength of the spring steel material. 2 .039 ≤ t ≤ .236"

Intersection points of min/max str ess limits which fall outside the 0
graph/zone boundaries ar e to be avoided as they indicate spring 0 2 4 6 8 10 12 14 16 18 20 22
failure is likely at an early stage. MINIMUM STRESS LIMIT
(preload stress psi x 10 4 )
The graphs were developed based on empirical test data. The test
loads were sinusoidally executed.
22
HOW TO USE THE GRAPHS
20
1) For standard catalog disc springs:
a) Determine preload stress 18

b) Determine final load stress
16
The intersection of the stress coordinates will indicate the range of LE
S
S

YC LE
14 4 C YC
fatigue life that may be expected. = 10
10
4 C
YC
LE
S
N x 4 C
=5 0
12 x1
2) For non-standard or special disc springs:
N
≥2
N
a) Determine the pr eload stress from formula on page 32 for 10
points S2 and S3. Use the HIGHER of the two values for
preload and final load. 8
b) Repeat above pr ocedure for FINAL STRESS using again
6
the higher value found.
4
3) EXAMPLE
DIAGRAM FOR DISC SPRINGS
AM188207: .709 x .323 x .0276 (see page 10) 2 .236 < t ≤ .551"
Preload stress at deflection f = .5h : 124000 psi
0
Final load stress at deflection f = .75h : 174000 psi 0 2 4 6 8 10 12 14 16 18 20 22
Intersection point between nearby 2 MIO-cycles-line:
MINIMUM STRESS LIMIT
Predicted cycles: 1.5 MIO (preload stress psi x 10 4 )
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DYNAMIC LOADING & FATIGUE LIFE

DISC SPRING STRESS CALCULATIONS TABLE 1
Values for M, C1, C2
α
OD/ID M C1 C2

1.10 .166 .986 1.002
1.15 .232 1.001 1.025
1.20 .291 1.016 1.048
1.25 .342 1.030 1.070
1.30 .388 1.044 1.092
1.35 .428 1.058 1.114
1.40 .463 1.072 1.135
1.45 .495 1.085 1.157
Where M, C 1, C2 are from Table 1. E and μ from material
1.50 .523 1.098 1.178
tables. 1.60 .571 1.124 1.219
1.70 .610 1.149 1.260
1.80 .642 1.173 1.300
1.90 .668 1.197 1.339
2.00 .680 1.220 1.378
2.10 .706 1.242 1.416
2.20 .721 1.264 1.453
a = D/d and L n = natural logarithm, stress as given is psi
DESIGN INFO

2.30 .733 1.286 1.490
S1 2.40 .742 1.307 1.527
2.50 .750 1.328 1.563
2.60 .757 1.348 1.599
2.80 .767 1.388 1.669
S2 3.00 .773 1.426 1.738
3.20 .776 1.464 1.806
S3 3.40 .778 1.500 1.873
For evaluation of compr essive stress, use formula S1. It 3.60 .778 1.535 1.938
computes the compr essive str ess at the upper inner 3.80 .777 1.570 2.003
diameter. This compr essive str ess may be as high as 4.00 .775 1.604 2.067
400,000 psi for certain bolted applications.

For dynamic applications, it is necessary to consider the
tensile str esses at the points marked S2 and S3. The
stresses at these points depend on the ratio of diameters
(α) and the spring characteristic (C) as well as on the
deflection (f). This stress should not exceed 200,000 psi
at .75h deflection. OD OR ID OD OR ID CLEARANCE
(MM) (INCH) MM INCH
OD AND ID GUIDE CLEARANCES Up to 16 0.63 0.18 0.008
Disc spring diameters change when the springs ar e Over 16 Up to 20 0.64 0.79 0.27 0.012
loaded. It is necessary to take this into account when Over 20 Up to 26 0.80 1.02 0.36 0.016
specifying clearances between springs and bolts or Over 26 Up to 31.5 1.03 1.24 0.45 0.020
guide rods operating in the ID of the spring, or between Over 31.5 Up to 50 1.25 1.97 0.54 0.024
springs and cavity walls when operating in holes. The Over 50 Up to 80 1.98 3.14 0.69 0.031
chart gives recommended MINIMUM guide clearances. Over 80 Up to 140 3.15 5.52 0.87 0.039
Over 140 Up to 250 5.53 9.85 1.41 0.063


32


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DISC SPRING STACKS
1
DISC SPRINGS MAY BE USED SINGLY
OR IN COMBINATIONS 2
3 3
P3

LOAD
2
P2
1
P1

Stacked in Parallel Series Parallel Series DEFLECTION
TOTAL DEFLECTION = TOTAL DEFLECTION = Combinations can be
3
deflection of 1 disc deflection of 1 disc x no. designed to accommodate P3 ≈ 3P1
TOTAL LOAD = load on 1 discs in stack virtually any load or
disc x no. of discs TOTAL LOAD = load on 1 deflection and to obtain
disc progressive or regressive 1
2
characteristics.
2
P2 ≈ 2P1

LOAD
3 1
LOAD P

P1

DESIGN INFO
DEFLECTION

DEFLECTION f Disc springs of dif fering thickness can be stacked in
series to obtain a pr ogressively rising load. This ef fect is
DISC SPRING DAMPING (Hysteresis) also obtained using same thickness springs but
In disc spring stacks, particularly those with parallel incrementally increasing the units in the stack. Car must
e
units, friction must be considered. Friction occurs due to be taken not to over-stress the spring in the stack.
contact of the spring face (radial wall). As a r esult, the
spring for ce incr eases on loading and decr eases on (Note: Friction forces between springs must be consider ed.)
unloading causing the damping ef fect. The load value is
a function of the number of disc springs in parallel as 1000
shown on the graph. An approximation of load
900
increase or decrease is on the order of 2–3 percent
per each set of 2. 800
3
18 x 8.2 x 0.7 x 1.25 OH 700
(.709 x .323 x .0276 x .0492 OH)
LOAD IN LB

600

Measured characteristic of various disc springs stacks 500

Stacks consisting of 10 single disc springs or 10 multi 400 2
spring components were tested. 300

Curve 1: Single discs of 10 in series 200
1
Curve 2: 10 sets of 2 parallel
100
Curve 3: 10 sets of 3 parallel
0
0 .02 .04 .06 .08 .1 .12 .14 .16 .18 .2
TRAVEL IN INCHES


33


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DISC SPRING MATERIALS: CHEMICAL/PHYSICAL PROPERTIES
CHEMICAL CONTENT IN %
Material C Si Mn P S Al Cr Ni V Fe Cu Ti Mo Co Columbium
Carbon Silicon Manganese Phosphorus Sulphur Aluminum Chromium Nickel Vanadium Iron Copper Titanium Molybdenum Cobalt & Tantalum

C1075 .7 - .8 .25 - .5 .6 - .8 .045 .045 – – – – – – – – –

SAE6150 .47 - .54 .15 - .35 .60 - 1.00 .035 .040 – .75 - 1.20 – .15 min. – – – – –

17/ 7 PH ≤ .09 ≤ 1.0 ≤ 1.0 – – .75 - 1.5 16.0 - 18.0 6.5 - 7.75 – – – – –
(ARMCO RG.T.M.)

AISI 301 ≤ .12 ≤ 1.0 ≤ 2.0 – – – 16.0 - 18.0 7.0 - 9.0 – – – – – –

INCONEL .08 .5 1.0 – .01 .7 15.5 70.0 – 7.0 .5 2.5 – 1.0 .95
X-750

INCONEL .08 .35 .35 .015 .015 .6 19.0 52.5 – 17.0 .3 .9 3.05 1.0 5.125
718

AISI H-13 .32 - .45 .8 - 1.2 .2 - .5 .03 .03 – 4.75 - 5.5 – .8 - 1.2 – – – 1.1 - 1.75 – –
ASTM A681

MECHANICAL PROPERTIES OF DISC SPRINGS AFTER HEAT TREATMENT
Tensile Strength E-Modulus (70° F) Poisson's Temperature
Material PSI PSI Ratio µ Range ° F

C1075 200-240.000 30 x 10 6 .30 300
SAE6150 200-240.000 30 x 10 6 .30 400
17/ 7 PH (ARMCO RG.T.M.) 170-220.000 29 x 10 6
.28 - 428 /572
DESIGN INFO

AISI 301 170-220.000 28 x 10 6 .29 - 330 /392
INCONEL X-750 Consult our Engineering Dept. 31 x 10 6
.29 to 1200
INCONEL 718 Consult our Engineering Dept. 29.8 x 10 6 .29 to 1300
INCONEL 625 Consult our Engineering Dept. 30 x 10 6
.30 to 1000
MONEL K500 Consult our Engineering Dept. 26 x 10 6 .30 to 1000

HARDNESS RANGES OF STAINLESS 301/ 302 (NOT HARDENABLE — WORK HARDENED ONLY)

1/4 Hard 1/2 Hard 3/4 Hard Full Hard
TS-125,000 psi min TS-150,000 psi min TS-175,000 psi min TS-185,000 psi min
or or or or
Rc - 25 min Rc - 30 min Rc - 35 min Rc - 40 min

LOAD CHANGE (DECREASE) (ΔP) VS. TEMPERATURE
70°F 400°F 575°F 750°F 850°F
Material E E ΔP E ΔP E ΔP E ΔP
psi•10 6 psi•10 6 % psi•10 6 % psi•10 6 % psi•10 6 %

SAE 6150 30 28.5 5 27.5 8.3 – – – –
AISI 301 28 24.9 9.8 – – – – – –
17/7 PH 2.9 24.4 6.2 23.2 10.8 – – – –

Temperature 70°F 250°F 500°F 1000°F 1200°F
Range E E %ΔP E %ΔP E %ΔP E %ΔP

Inconel psi•10 6 psi•10 6 – psi•10 6 – psi•10 6 – psi•10 6 –
X-750
31 30.8 .6 28.7 7.4 25 19.4 23 25.8

Note: Designation of all stainless disc springs ar e prefixed with “S”. In all cases customer ΔP = Load Change
must specify type of stainless required by giving identification following the part no. e.g., 17/ 7 PH or 301, etc. E = Modulus of Elasticity


34


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SUGGESTED TIGHTENING TORQUE 1
VALUES TO PRODUCE CORRESPONDING BOLT CLAMPING LOADS

Bolt Tensile SAE GRADE 2 BOLTS SAE GRADE 5 BOLTS SAE GRADE 7 3 SAE GRADE 84
Size Diam. Stress Tensile Proof Clamp 2
Tightening Torque Tensile Proof Clamp 2
Tightening Torque Clamp 2 Tightening Torque Clamp 2 Tightening Torque
D (in.) Area Strength Load Load Dry Lub. Strength Load Load Dry Lub. Load Dry Lub. Load Dry Lub.
A (sq. in.) (min. psi) (psi) P (lb.) K=0.20 K=0.15 (min. psi) (psi) P (lb.) K=0.20 K=0.15 P (lb.) K=0.20 K=0.15 P (lb.) K=0.20 K=0.15
lb. in. lb. in. lb. in. lb. in. lb. in. lb. in. lb. in. lb. in.
4–40 0.1120 0.00604 74.000 55.000 240 5 4 120.000 85.000 380 8 6 480 11 8 540 12 9
4–48 0.1120 0.00661 280 6 5 420 9 7 520 12 9 600 13 10
6–32 0.1380 0.00909 380 10 8 580 16 12 720 20 15 820 23 17
6–40 0.1380 0.01015 420 12 9 640 18 13 800 22 17 920 25 19
6–32 0.1640 0.01400 580 19 14 900 30 22 1100 36 27 1260 41 31
8–36 0.1640 0.01474 600 20 15 940 31 23 1160 38 29 1320 43 32
10–24 0.1900 0.01750 720 27 21 1120 43 32 1380 52 39 1580 60 45
10–32 0.1900 0.02000 820 31 23 1285 49 36 1580 60 45 1800 68 51
1
⁄4 -20 0.2500 0.0318 1320 66 49 2020 96 75 2500 120 96 2860 144 106
1
⁄4 -28 0.2500 0.0364 1500 76 56 2320 120 86 2860 144 108 3280 168 120
lb. ft. lb. ft. lb. ft. lb. ft. lb. ft. lb. ft. lb. ft. lb. ft.
5
⁄16 -18 0.3125 0.0524 2160 11 8 3340 17 13 4120 21 16 4720 25 18
5
⁄16 -24 0.3125 0.0580 2400 12 9 3700 19 14 4560 24 18 5220 25 20
3
⁄8 -16 0.3750 0.0775 3200 20 15 4940 30 23 6100 40 30 7000 45 35
3
⁄8 -24 0.3750 0.0878 3620 23 17 5600 35 25 6900 45 30 7900 50 35
7
⁄16 -14 0.4375 0.1063 4380 30 24 6800 50 35 8400 60 45 9550 70 55
7
⁄16 -20 0.4375 0.1187 4900 35 25 7550 55 40 9350 70 50 10700 80 60
1
⁄2 -13 0.5000 0.1419 5840 50 35 9050 75 55 11200 95 70 12750 110 80
1
⁄2 -20 0.5000 0.1599 6600 55 40 10700 90 65 12600 100 80 14400 120 90
9
⁄16 -12 0.5625 0.1820 7500 70 55 11600 110 80 14350 135 100 16400 150 110
9
⁄16 -18 0.5625 0.2030 8400 80 60 12950 120 90 16000 150 110 18250 170 130

DESIGN INFO
5
⁄8 -11 0.6250 0.2260 9300 100 75 14400 150 110 17800 190 140 20350 220 170
5
⁄8 -18 0.6250 0.2560 10600 110 85 16300 170 130 20150 210 160 23000 240 180
3
⁄4 -10 0.7500 0.3340 13800 175 130 21300 260 200 26300 320 240 30100 380 280
3
⁄4 -16 0.7500 0.3730 15400 195 145 23800 300 220 29400 360 280 33600 420 320
7
⁄ 8 -9 0.8750 0.4620 60.000 33.000 11400 165 125 29400 430 320 36400 520 400 41600 600 460
7
⁄ 8 -14 0.8750 0.5090 12600 185 140 32400 470 350 40100 580 440 45800 660 500
1- 8 1.0000 0.6060 15000 250 190 38600 640 480 47700 800 600 54500 900 680
1-12 1.0000 0.6630 16400 270 200 42200 700 530 52200 860 660 59700 1000 740
1 1⁄8-7 1.1250 0.7630 18900 350 270 105.000 74.000 42300 800 600 60100 1120 840 68700 1280 960
1 1⁄8-12 1.1250 0.8560 21200 400 300 47500 880 660 67400 1260 940 77000 1440 1080
1 1⁄4-7 1.2500 0.9690 24000 500 380 53800 1120 840 76300 1580 1100 87200 1820 1360
1 1⁄4-12 1.2500 1.0730 26600 550 420 59600 1240 920 84500 1760 1320 96600 2000 1500
1 3⁄8 -6 1.3750 1.1550 28600 660 490 64100 1460 1100 91000 2080 1560 104000 2380 1780
1 3⁄8 -12 1.3750 1.3150 32500 740 560 73000 1680 1260 104000 2380 1780 118400 2720 2040
11⁄2 -6 1.5000 1.4050 34800 870 650 78000 1940 1460 111000 2780 2060 126500 3160 2360
11⁄2 -12 1.5000 1.5800 39100 980 730 87700 2200 1640 124005 3100 2320 142200 3560 2660

Notes: 2. Clamp load is also kno wn as preload or initial load in tension on 3. Tensile strength (min psi) of all Grade 7 bolts is 133.000. Proof
1. Tightening torque values are calculated from the formula T =KDP, bolt. Clamp lead (lb) is calculated by arbitrarily assuming usable bolt load is 105.000 psi.
where T =tightening torque, lb-in. K =torque-friction coefficient; strength is 75% of bolt proof load (psi) times stress area (sq in.) of 4. Tensile strength (min psi) of all Grade 8 bolts is 150.000 psi.
D =nominal bolt diameter , in.; and P =bolt c lamping load developed threaded section of each bolt size. Higher or lo wer values of c lamp Proof load is 120.000 psi.
by tightening, lb. load can be used depending on the application requirements and the Ref.: Fastening Reference . Machine Design . Nov. 1977.
judgment of the designer.

10,000

9,000
BOLT CLAMPING FORCE (lbs.)

5/8" - 11
BOLT 8,000
CLAMPING 7,000
1/2" - 13

FORCE VS. 3/4" - 10
6,000
TIGHTENING
3/8" - 16
TORQUE FOR 5,000
UNLUBRICATED 4,000 5/16" - 18
STEEL BOLTS
3,000

2,000

1,000

0
0 100 200 300 400 500 600 700 800 900 1000
TIGHTENING TORQUE (inch - lbs.)
35


410-391-7400
Fax 410-687-9223

REQUEST FOR QUOTE

Copy and fax this form to MPS/Rolex Spring for a fast quote on your next disc springs pr oject.
Fax to 410-687-9223
*required

Date__________________________________________________ Time _____________________________________________

First name*________________________________________ Last name* _____________________________________________

Company name* ___________________________________________________________________________________________

Street address* ____________________________________________________________________________________________

City*_________________________________________________ State* _____________________________________________

Zip/postal code ___________________________________ Email address _____________________________________________

Telephone* ______________________________________________ Fax _____________________________________________

Please provide the following information (please state units of measurement used in each field):

Outside diameter_________________________________ Inside diameter______________________________________________

Thickness ___________________________________ Reduced thickness _____________________________________________

Overall height ______________________________________________

For custom disc springs please pro vide the following information (please state units of measurement used in each field):

Loads at which deflections (if kno wn)____________________________________________________________________________

Loads at which heights (if kno wn) ______________________________________________________________________________

Maximum OD _____________________________________Minimum OD ______________________________________________

Maximum ID _______________________________________Minimum ID ______________________________________________

Maximum deflection _______________________Maximum height possible ______________________________________________
REQUEST FOR QUOTE

Avg. operating temp. (or temp. range) _________________Maximum temp. ______________________________________________

Cycles desired? ___________________________ Dynamic or Static

Corrosive media? Yes (please indicate) ________________________ No

Are the disc springs guided on OD or ID?

Is guiding element hardened (56 HRc min) and ground? Yes No

Lubrication _________________________________________________

Quantity required & frequency ___________________________________

All information provided will be trea ted in the strictest confidence and will not be made a vailable to third parties.


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Rolex Science: Spareparts (2)

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