Suppliers of Flanged Rubber Bearings In Bronze Or S.S. Shell, Metal Sleeve Rubber Bearings In Bronze, S.S. Shell And Hard Composite Sleeve Rubber Bearings.These

1. GENERAL METALS & POLYMERS
OFFICE: 12-A2/2, AFCO, L.I.C. COLONY, BORIVLI (W), MUMBAI - 400103, INDIA
REGD. ADD: UNIT NO. 22 / 23, HIGHWAY INDUSTRIAL PREMISES CO-OP. SOCIETY LTD.,
SATIVALI, VASAI (E), TALUKA: VASAI, DISTRICT: THANE - 401208, MAHARASHTRA, INDIA.
PHONE: 0091 22 6570 5689
Tele. Fax: 0091 22 2895 7212
e-mail: icongmp@vsnl.com
Mfrs.: Rubber Bearing Bushes, Established In 1979
GENERAL METALS & POLYMERS
Profile
Established in the year 1979, “General Metals & Polymers”, is India’s leading manufacturer
and exporter of Water Lubricated Rubber Bearings / Cutless Rubber Bearings. Our range
of bearings includes Metal (Brass, Bronze or Stainless Steel) and non metal (Hard Composite)
Shell with rubber lining in Nitrile or Neoprene, with or without flange. Our products find usage in
vertical pumps and marine industry for propeller shaft stern tubes and rudder bearings. Our
bearings cover a wide range of shaft diameters from 25mm to 400mm. (Bespoke sizes can
also be made on request).
Our bearings are precisely designed and manufactured by adept professionals, using finest
grade synthetic rubber, rubber chemicals, ferrous & non ferrous metals. Owing to premium
grade material used and skilled workmanship our bearings have precision construction, wear
resistance and longer life. Further General Metals & Polymers is an ISO 9001:2008 certified
organization.
General Metals & Polymers has a state of the art manufacturing facility at Vasai, Maharshtra.
This facility is equipped with moulding presses, turning and grinding machines that support us
in manufacturing bearings in bulk quantity. Moreover, as a result of our vast production facility,
we have are able to maintain installed capacity of bearings consistently to 10000 pcs per
month. With an aim to facilitate clients with flawless products, we conduct physical & chemical
test of rubber and metals before manufacturing and dimensional stability check of every
finished bearing before dispatch. Testing and quality control is conducted at our lab equipped
for tensile testing, elongation testing, abrasion testing, friction testing, and swelling testing and
also dimension checking equipment and gauges. With a pristine track record for high quality and
on time delivery, we have garnered a vast customer-pool across the markets of North Europe,
Middle
East,
India
and
Indian
Subcontinent.
Some
of
our
clients
are Teignbridge UK, Teignbridge UAE, BT-Marine UK, Expert United UAE, BT-Marine
Netherlands, Tamkeen Indl. KSA, Tata Power, Reliance Energy, JSW Power, Jaypee
power, NTPC, etc. and OEM’s such as BHEL, Clyde Union, WEIR, Voltas, Mather & Platt,
etc.
Contact:
Noel Menezes
+91 9833362482
noel@gmp.net.in

2. India’s Leading Manufacturer and Exporter of Cutless Rubber Bearings

3. General Metals & Polymers
•
Established in 1979, General Metals & Polymers is an ISO 9001:2008 certified
organization, a manufacturer and exporter specialising in Cutless rubber
bearings.
•
GMP has been supplying Cutless bearings to Pump manufactures, Shipping
companies, Ship repair and marine spare companies, OEM’s, OMS’s &
maintenance companies all across India, Middle East, Europe and Australia for
over 30 years.
•
GMP is the first Indian company to indigenously develop WATER LUBRICATED
BEARINGS for the Indian Navy in 1981

4. GMP Cutless Bearings
•
GMP bearings are used in marine industry for propeller shaft stern tubes, rudder
bearings and industrial vertical pumps covering a wide range of shaft diameters
from 25mm to 400mm. (bespoke sizes can be made on request)
•
GMP bearings are used in
-
Marine propeller stern tubes
- Cooling Water & ACW Pumps
-
Rudder bearings
- Condensate Extract Pumps
-
Vertical turbine Pumps
- Desalination Plant Pumps

5. High Performance Marine bearings
•
GMP bearings are proven in the toughest marine enjoinments since 1979.
•
Environmentally safe, Non Hazardous and Economical.
•
High resistant to abrasion, corrosion and swelling in sea water.
•
Resistance to shock and edge loading
•
Specially formulated nitrile rubber that makes it extremely tough, chemical and
oil resistant with very low friction.
•
Offers class leading resistance to abrasion and wear, even in the most adverse
conditions.

6. GMP Range of Bearings
Cylindrical
Flanged
Cylindrical and Flanged Sleeve.
Spiral
Fluted
The inside rubber lining is Fluted or Spiral
Circular
Polygonal
Fluted in Circular or Polygonal Profile.
Available in metal or composite outer sleeve with Nitrile or Neoprene rubber lining.

7. Types of GMP Bearings
GMP Flanged Bearing
GMP Metal Sleeve Bearing
(Brass/Bronze/Stainless Steel)
GMP Split bearing
GMP Composite Sleeve Bearing

8. Non Metal Sleeve Materials
•
GMP Phenolic Bearings are made of proprietary composite materials
developed by our in house R&D team.
•
GMP Phenolic bearings can match the temperature range of other
rigid alternate bearing materials to function at temperatures from -4°C
to 70°C
•
High temperature resistance and negligible swelling characteristics of
GMP composite rubber bearings enable them to operate at a closer
running clearance than any other bearing material. Abrasion
measured according to DIN 53516 - RT(mm3 loss) : 30-80 & 150°C(mm3
loss) : 50-80.
•
GMP composite bearings allow a dry start up of 2 min
•
GMP Phenolic bearings are widely exported to Europe, Middle East
and Australia.

9. Metal Sleeve Materials
GMP Brass Bearing
Grades:
LCB-1 (IS: 292)
LCB-2 (BS 1400)
DCB-1 BS 1400)
DCB-3 BS 1400)
ASTM B-135 C-27200
GMP Stainless Steel Bearing
Grades:
SCS 23
AISI 316
SS 316
ASTM A276, UNS S32205
ASTM A890-4A, UNS J92205
GMP Bronze Bearing
Grades:
LTB-1 (IS: 318)
LTB-2 (IS: 318)
LG-1 (BS 1400)
LG-2 (BS 1400)

10. GMP Flanged Bearings
•
Our Flanged Bearings are cast centrifugally with
an integral flange, the shells are heavy walled.
•
The flange provides structural strength to retain
bearing and prevent rotation in housing.
•
Shells are furnished un-drilled unless specified.
•
Available in solid and split design.

11. GMP Split bearing
•
Designed for easy fitment and extraction in
bronze or stainless steel
•
Shells are precision machined with keystone
or dovetail races.
•
Longitudinal water grooves run the full length
of the shell to provide optimum water
flushing and lubrication

12. GMP Quality
Testing and quality control is conducted at our lab equipped for
•Tensile testing
•Elongation testing
•Abrasion testing
•Friction testing
•Swelling testing
The QC department is equipped with dimension checking equipment and gauges.

13. A few of our Customers

14. GMP bearings samples

15. GENERAL METALS & POLYMERS
GMP PUMP BEARINGS
DRY START UP RUN UPTO 2 MIN
HIGH RESISTANCE TO SAND WEAR
CLOSER RUNNING CLEARANCE
BEARING LENGTH
FLANGE
THICKNESS
BEARING
FLANGE
DIAMETER
RUBBER
BEARING
OUTSIDE
DIAMETER
METAL
I.D.
METAL
THICKNESS
FLUTE
WIDTH
FLUTE
DEPTH
SHAFT
DIAMETER
Water Lubricated Rubber Bearings
for Industrial Pumps

16. WHY RUBBER BEARINGS ARE PREFERRED FOR VERTICAL PUMPS
1.
LOW FRICTION: At operating shaft speeds, coefficient of friction between wet rubber and metal
matches that of ball bearings (0.005)
2.
WATER WEDGE FORMATI ON: Even at slow shaft surface speeds (1.2 mtrs/sec), a
hydrodynamic film is formed at the rubber-metal interface due to non compressibility of water
and its tendency to adhere to metal while not adhering to rubber. This results in great reduction
of friction, wear and heat.
3.
WEAR RESISTANT RUBBER: The softness of rubber helps reduce shaft/sleeve wear while the
toughness of rubber protects the bearing itself from wearing off.
4.
REDUCTION IN VIBRATION & NOISE: Vertical pumps have number of stages and long shafts
without adequate structural support below mounting floor. This makes the system flexible at operating
speeds of the shaft and can cause high vibration and noise. Unlike rigid bearings, soft and wear
resistant rubber bearings can absorb and reduce the vibration greatly. Vibration damping quality
of rubber bearings is a very important factor that cannot be overlooked in a flexible vertical pump
system.
5.
ACCOMMODATES MINOR MISALIGNMENT AND IMBALANCE: Even a well aligned and
balanced system tends to loose its balance over a period of operation on account of the uneven
wear of movable parts. Unlike rigid bearings, resilience of rubber can accommodate minor
imbalances. The flexibility of rubber also permits the shaft
GMP PUMP BEARING
to turn on its center of rotation even when it is
eccentric with its geometric center.
6.
LOW SHAFT/SLEEVE WEAR BY SAND & SILT:
The sand particles get pressed by the
harder metal sleeve into the softer rubber
and roll into the grooves by the rotary
motion of the sleve. The water flow flushes
out the sand particles.
WATER GROOVE
SHAFT
ROTATION
SAND
METAL SHAFT
IN LIGHT OF NEW DEVELOPMENTS IN RUBBER TECHNOLOGY
Replacing flexible rubber which can control shaft wear and vibration with rigid bearing material
is no more desirable. To day rubber without sacrificing vibration damping and wear resistant
properties can operate at closer running clearance and allow start up dry run upto 2 min.
1.
HIGH TEMPERATURE RESISTANCE: GMP COMPOSITE RUBBER BEARINGS can
match the temperature range of other rigid alternate bearing materials to function at
temperatures from -40°C to 150°C.
2. CLOSER RUNNING CLEARANCE: High temperature resistance and negligible swelling
characteristics of GMP composite rubber bearings enable them to operate at closer
running clearance than any other bearing material. Abrasion measured according to DIN
53516 - RT(mm3 loss) : 30-80 & 150°C(mm3 loss) : 50-80.
3. LONGER DRY START UP: GMP composite bearings allow a dry start up of 2 min which is
adequate for vertical pumps.
4. G M P P U M P B E A R I N G S C A N D O I T :
Inherent qualities of rubber like
flexibility, vibration damping, and wear
r e s i s t a n c e h a v e b e e n factored while
making vertical pumps used by you. Now
GMP COMPOSITE RUBBER BEARINGS
have acquired the capability to operate
at higher temperatures without sacrificing
the qualities of rubber for dry run and
closer running clearance.

17. MANUFACTURING
DESIGN
1. Outer shell: Cast or extruded brass or SS
tubes
2. Bonding surface: Shell bore is grooved to
increase surface area
3. Bonding: Chemical bonding
4. Rubber compound: Nitrile, neoprene,
HNBR, Composites
5. Molding process: Transfer molding at
170°C and upto 150 kg/sq cm pressure
6. Machining: Internally and externally
turned and ground
7. Checking: Gauge measurements
internally. Dial gauge checking externally
8. Packing: Impact and weather resistant
packing
1. Min. Bearing Area: 50% of the rubber surface
2. Max. Load: < 0.0246 kg/sq. mm. of inside area
Load calculation: Total Load (kg/sq mm) ÷
[Length bearing in mm x inside dia in mm]
3. Lubricating water flow: (Min) Shaft dia in cm x
3.5 liters/min
4. Groove shape: Polygonal or 'V', 'U' in circular
with sharp edges rounded off
Circular
Polygonal
TESTING
Shell material tested for chemical and physical properties
Rubber tested for bonding, abrasion, swelling, tensile strength and elongation
DESIGN SUPPORT GUIDE FOR BRASS OR SS SHELL BEARINGS
THICKNESS +/- 10%
GROOVES
GROOVE
WIDTH +/- 10%
GROOVE
DEPTH +/- 10%
LENGTH
+/- 10%
C (MM)
D (No.)
E (MM)
(A*3.14)*40%
D
F (MM)
B*70%
G (MM)
A*1.5
3
3.5
4
4.5
5
6
8.5
10.5
12.5
4-6
6-8
8
8
8-10
8-10
10-12
10-12
10-12
SHAFT
SLEEVE DIA
RUBBER
SHELL
A (MM)
B (MM)
4.5
6.5
8.5
10
11.5
12
13
14.5
16.5
15 - 25
25 - 50
50 - 75
75 - 100
100 - 125
125 - 150
150 - 170
170 - 200
200 - 230
3.14
4.71
8.63
12.56
13.18
13.6
11.51
16.14
18.84
–
–
–
–
–
–
–
–
–
5.2
7.85
11.77
15.7
15.7
15.7
17.79
17.94
20.63
3.15
4.55
5.95
7
8.05
8.4
9.1
10.15
11.55
22.5 – 38.1
60 – 100
110 – 150
160 – 200
210 – 250
260 – 300
220 – 340
260 – 400
420 - 460
RUNNING CLEARANCE
SHAFT
DIAMETER
mm
19.050
22.225
25.400
28.575
31.750
34.925
38.100
41.275
44.450
47.625
50.800
53.975
57.150
60.325
63.500
66.675
69.850
73.025
76.200
79.375
SHAFT
CLEARENCE
mm
O.D.
TOLERANCE
mm
+0.05 / 0.18
+ 0.08 / 0.23
±0.03
+0.10 / 0. 25
+0.13 / 0.28
+0.18 / 0.36
±0.05
SHAFT
DIAMETER
mm
82.550
85.725
88.900
92.075
95.250
98.425
101.600
104.775
107.960
111.125
114.300
117.475
120.650
123.825
127.000
133.350
136.525
139.700
142.875
146.050
SHAFT
CLEARENCE
mm
O.D.
TOLERANCE
mm
+0.18 / 0.36
+0.20 / 0.38
+0.20 / 0.43
±0.05
SHAFT
DIAMETER
mm
149.225
152.400
158.750
165.100
171.450
177.800
184.150
190.500
196.850
203.200
209.550
215.900
222.250
228.600
234.950
241.300
247.650
254.000
260.350
266.700
SHAFT
CLEARENCE
mm
O.D.
TOLERANCE
mm
+0.20 / 0.43
±0.05
±0.13
+0.20 / 0.46
+0.23 / 0.53
SHAFT
DIAMETER
mm
SHAFT
CLEARENCE
mm
273.050
279.400
285.750
292.100
298.450
304.800
311.150
317.500
323.850
330.200
336.550
342.900
349.250
355.600
361.950
368.300
374.650
381.000
+0.23 / 0.53
+0.23 / 0.61
+0.23 / 0.64
O.D.
TOLERANCE
mm

18. Rubber bearings have nearly 100 years proven in record as the most suitable water lubricated
bearings. The efficiency of water lubricated rubber bearings encouraged industrial pump designers
to adopt them in vertical shaft water pumps. Today, most vertical pumps in use as well as those
being designed have rubber bearings as standard components. In addition to bearing qualities
rubber greatly reduces vibration and wear of shaft by abrasive particles in the medium.
Established in 1979, GMP is
manufacturing to ISO 9001:2008
quality system requirements. With
over 30 years experience in design
and manufacture of water lubricated
rubber bearings – GMP PUMP
BEARINGS are recognised for their
quality & performance in standard and
non-standard sizes. Our location and
local support team enables a faster
response for your requirements.
GMP PUMP BEARING APPLICATIONS:
Ash Handling Plant Pumps
Condensate Extract Pumps
Cooling water & ACW Pumps
Desalination Plant Pumps
Irrigation Water Pumps
YOUR LOCAL
GMP DISTRIBUTOR
GENERAL METALS & POLYMERS
12,A2/2 AFCO,L.I.C.COLONY,BORIVALI (W),MUMBAI -400 103,INDIA.Telefax :
+91 (22) 2895 7212 • Tel. No. : +91 (22) 6570 5689
Email : icongmp@vsnl.com • www.gmp.net.in

19. GENERAL METALS & POLYMERS
Materials
Non Ferrous Shell
Gun Metal - B.S. 1400 - LG 2
Gun Metal - B.S. 1400 - SAE-660
Naval Brass - B.S. 2781 - Cz112
Non Metal Shell - Phenolic (Rubber based)
Bearing Lining material:
Nitrile Rubber
Resistant to Oil
Resistant to Water Swell
Resistant to Wear
Resistant to Heat
Material: Properties :
NITRILE RUBBER
Static Load Capacity
Dynamic Load capacity
Hardness
Tensile Strength
Modulus
Elongation Break
Tear Strength
Compression Set
:
:
:
:
:
:
:
:
=4 [N/mm2]
=35 [m/s]
65-75 Shore-A
11 MPa
3.7@100%(MPa)
250%
22 MPa
20(22hrs@70°C)
Bearing selection :
Normally bearing length is 4 times of shaft diameter.
Deviations are acceptable if load requirements permit.
Load Capacity is 35 psi x Bearing Area.
Bearing Area = Shaft Ø x Bearing length.
Example in Metric size :
Shaft dia 100 x length 400 = 40000 sq.mm. Bearing Area.
Load Capacity = 40000 sq.mm x 0.0246 kg/sq.mm = 984 kg.
Example in Imperial Size :
Shaft dia 3.937” x length 15.748” = 62” sq.inch. Bearing Area.
Load Capacity = 62 sq.inch x 35 kg/sq.in = 2170 lbs.
Established in 1979, GMP have over three decades of experience in the
manufacture of Rubber Bearings for propeller shafts of marine vessels and
impeller shafts of pumps. Smooth rubber surface, when lubricated with
water, matches the extremely low friction of oil lubricated metal bearings
like ball bearings. To this inherent property of rubber other essential bearing
qualities are added at GMP by skillful engineering and processing. Thus
GMP Bearings are resistant to wear, corrosion and swelling in sea water.
They absorb shock and vibration. Their grooves are designed for optimum
water flow to cushion the shaft. They are tough enough to meet the load and
their strong bonding is fail-safe. In the manufacture of GMP Bearings US
Navy specifications are followed as standard.
OUR RANGE
MARINE & INDUSTRIAL
RUBBER BEARINGS
Cylindrical
Flanged
Fluted
Spiral
Circular
Polygonal
with
BRASS SHELL
or
COMPOSITE POLYMER
SHELL
with
NITRILE or NEOPRENE
Rubber Lining
in
CYLINDRICAL OR
FLANGED SHELLS
with
FLUTED OR SPIRAL GROOVES
and
CIRCULAR OR
POLYGONAL BEARING
SURFACE
GENERAL METALS & POLYMERS
GENERAL METALS & POLYMERS
No. 12, AFCO, A- 2/ 2, L. I. C. Colony, Borivli (West)
Mumbai - 400103, India
Mobile: +91 9967648124
Tel: +(91) - (22) - 65705689 Telefax: +(91) - (22) - 28957212
Email: icongmp@vsnl.com Website: www.gmpbearings.com
No. 12, AFCO, A- 2/ 2, L. I. C. Colony, Borivli (West)
Mumbai - 400103, India
Mobile: +91 9967648124
Tel: +(91) - (22) - 65705689 Telefax: +(91) - (22) - 28957212
Email: icongmp@vsnl.com Website: www.gmpbearings.com
RUBBER
BEARING
BUSHES
MARINE
&
INDUSTRIAL

20. AND INDUSTRIAL BEARINGS IN mm & inches
Sr. Shaft
Outer
Bush
Bush
Brass Shell Composite
No. Diameter Diameter Full length Half Length Thickness shell Thickness
Sr.
No.
Shaft
Diameter
Outer
Diameter
Bush
Length
Brass Shell Composite shell
Thickness
Thickness
40
55
160
78
3
4
1
2
3
8
1/8
3/16
2
45
65
180
88
3
5
2
2 1/8
3 1/8
8 1/2
1/8
3/16
3
50
70
200
98
3
5
3
2 1/4
3 1/8
9
1/8
3/16
4
55
75
220
108
3
5
4
2 1/4
3 3/8
9
1/8
3/16
2 3/8
3 3/8
9 1/2
1/8
3/16
6
65
85
260
128
3
5
6
2 1/2
3 3/8
10
1/8
3/16
7
70
90
280
138
3
5
7
2 3/4
3 3/8
10 1/2
1/8
3/16
8
75
95
300
148
3
5
8
2 7/8
3 3/4
11 1/2
1/8
3/16
9
3
3 3/4
12
1/8
3/16
10
3
4
12
1/8
3/16
11
3 1/8
4 1/4
12 1/2
1/8
3/16
12
3 1/4
4
13
1/8
3/16
13
3 3/8
4 1/2
13 1/2
1/8
3/16
14
3 1/2
4 1/4
14
1/8
3/16
15
3 5/8
4 1/2
14 1/2
1/8
3/16
16
3 3/4
4 1/2
15
1/8
3/16
100
320
158
3
5
10
85
105
340
168
3
5
11
90
110
360
178
3
5
12
95
115
380
188
3
5
13
100
125
400
198
4.75
6
14
105
130
420
208
4.75
6
15
110
135
440
218
4.75
6
16
115
145
460
228
4.75
7
17
3 7/8
5 1/4
15
3/16
1/4
17
120
155
480
238
6.25
7
18
4
5
16
3/16
1/4
18
125
165
500
248
6.25
8
19
4 1/2
5 1/4
16 1/6
3/16
1/4
19
130
170
520
258
6.25
8
20
4 1/2
5 1/2
18
3/16
1/4
20
135
170
540
268
6.25
8
21
5
6 1/8
20
1/4
5/16
21
140
180
560
278
6.25
9
22
5
6 1/2
20
1/4
5/16
22
145
180
580
288
6.25
9
23
5 1/2
6 3/4
22
1/4
5/16
23
150
190
600
298
6.25
9
24
5
7 1/2
24
1/4
5/16
24
155
190
620
308
6.25
9
25
6 1/8
7 1/2
25
1/4
5/16
BUSHES ARE AVAILABLE FOR HIGHER SHAFT DIA. AND NON STANDARD DIMENSIONS
* LENGTH OF FORWARD BUSHES WILL BE 1/16" SHORTER THAN HALF
MARINE SHAFT CLEARANCE
80
SHAFT DIAMETER
9
inches
0.070
0.081
0.100
0.107
0.120
0.124
0.131
0.142
0.148
0.153
0.157
0.164
0.165
0.175
5
mm
1.78
2.06
2.54
2.72
3.05
3.15
3.33
3.61
3.75
3.89
4.00
4.17
4.20
4.45
3
inches
0.003 to 0.008
0.004 to 0.010
0.006 to 0.012
0.007 to 0.014
0.008 to 0.015
0.010 to 0.017
0.012 to 0.019
0.015 to 0.022
0.017 to 0.025
0.020 to 0.029
0.022 to 0.032
0.024 to 0.034
0.025 to 0.035
0.027 to 0.037
118
mm
0.08 to 0.2
0.1 to .25
0.15 to 0.3
0.18 to 0.36
0.2 to 0.39
0.25 to 0.43
0.3 to 0.48
0.38 to 0.56
0.43 to 0.64
0.51 to 0.74
0.56 to 0.81
0.61 to 0.86
0.64 to 0.89
0.69 to 0.94
240
inches
0.750 to 1.375
1.5 to 2
2 to 2.375
2.375 to 3
3 to 3.75
3.75 to 4.375
4.375 to 5
5 to 5.375
5.375 to 6
6 to 6.375
6.375 to 6.75
6.75 to 7.25
7.375 to 7.625
7.75 to 8.25
80
mm
20 to 35
36 to 50
51 to 60
61 to 75
76 to 95
96 to 110
111 to 125
126 to 135
136 to 150
151 to 160
161 to 170
171 to 185
186 to 195
196 to 210
60
REPLACE - MENT
CLEARANCE
5
5
O.D.
TOLERENCE
CYLINDERICAL
1
±0.13 ±0.005 ±0.10 ±0.004
Outer shell - BRASS or COMPOSITE
Rubber Lining - NITRILE or NEOPRENE
0.05 ±0.002 ±0.08 ±0.003
Outer shell - BRASS or COMPOSITE
Rubber Lining - NITRILE or NEOPRENE
±0.03 ±0.001
CLEARANCE & TOLERANCES FOR MARINE
mm inches mm inches
CATALOGUE - inch Series
O.D.
TOLERENCE
FLANGED
CATALOGUE - m.m. Series
* Use plug gauges for bore measurement.
* Bearings made by G.M.P are inspected for compliance with the prescribed tolerances.
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