P.T. International Corp. provides power transmission products including mounted bearings, drive products, and European linear components. They are headquartered in Charlotte, NC with an 80,000 square foot facility stocking over 25,000 SKUs. The document discusses their global manufacturing and sourcing, engineering capabilities, and ISO 9001:2008 certification. It also provides details on their product range, inspection processes, and installation guidelines for mounted spherical bearings.

1. P.T. International Corp.
Metric & American Standard
Power Transmission Products
Global Production
Broad Euro Product Range
Global Markets Prefer Metric -
Easier to Source Spare Parts

2. Mounted Bearings, Drive Products &
European Linear Components

3. P.T. International Corp.
Headquartered in Charlotte NC
80,000 Ft² - 25,000 SKU’s
Global Manufacturing &
Sourcing
Engineering and Design
Capabilities
Sales Reps in US, Canada and
Europe
ISO 9001:2008 Certified

4. Inspection & Warehouse
Shaft Center Height
PTI Warehouse
Bore Measurement
with Sylvac Digital Go/No Go Gauges,
Instruments Thread Gauges &
Taper Bore Gauges

5. Mounted Roller Bearings
SAFS/SDAF Split Pillow
Blocks thru 21” Shaft
Diameter and Multiple Seal
Options
SN/SD Split Plummer
Blocks thru 400mm
Bores in stock

6. Standard Split Block Components
Tapered Spherical
Split Housing Tapered Adapter Bearing
LER Triple Labyrinth Seal Fixing Ring Lock Nut Lock Washer or Clip

7. Optional Components
Hydraulic Adapter PER Seals End Cover Taconite Lock Nut with
w/ O-ring Seal Mounting Screws
Hydraulic Nut (Tool) LER-DC Dust Cover PTV Seal for PER

8. Introduction – Housing Features
Optional Oil Sight Glass Large Lube Plugs/Drains & Face
Optional Temp. Strip (cross-port drilled) Grooves for Dust Cover Seal
Matched Cap & Base, Offset Dowel for Solid Base for Strength
& Large Pry Slots Proper Assembly and Oil Cross-port

9. SAF Complete Unit Nomenclature
SAF 22528 x 4-15/16 Includes:
SAF 528 Housing, Seals, and Fixing Ring
22228K C3 W33 Spherical Bearing
K = Tapered Bore
C3 = Internal Clearance
W33 Lube groove on OD of Bearing
SNW 28 x 4-15/16 Adapter (or H3128 x 4-15/16)
SNW = Sleeve, Nut, Washer – Inch Treads (H=Metric Thds.)

10. SAF Housing Nomenclature
SAF – Cast Iron Housing (Std U.S.)
SAFD – Ductile Housing (Std Canada)
SAFS – Steel Housing
FSAF – Standard Four Bolt Base
SAF 509 to SAF511 - 2 Bolt Base (Housing Only_
SAF513 to SAF520 - 2 Bolt Base
FSAF 513 to FSAF 520 - 4 Bolt Bases
SAF 522 & Up - 4 Bolt Bases only
Bearing Nomenclature: Last 2 digits x 5 = Bore in
mm.

11. Installation
Installation
1. Read Instruction Manual
2. Tools Required:
Feeler Gauges, Tape Measure
Spanner Wrench & Sledge or Hyd. Nut & Porta Pak & Fittings
Hoist, Wrenches, Lube
• Document Installed Detail
• Install Fixed Bearings First.

12. Shaft and Housing Fits
Installation
1. SAF Blocks have
Clearance fits, Typically
H8 to allow the bearing to
float within the housing Housing
for expansion.
2. Each shaft requires 1
fixed bearing and 1
bearing to float to handle
expansion.
3. Typical fit to the shaft is
0.0005” interference per
inch of shaft diameter. Shaft

13. Documentation - Measure & Record the
Un-mounted Internal Bearing Clearance
Installation
1. On free standing Spherical
Bearings, the clearance is at the top
between roller and outer race.
2. For Spherical Bearings hanging free on a
shaft, the clearance is between the lowest
roller and inner race, but difficult to measure
there. So carefully measure between the
roller and outer race.
3. Document measurements for future reference.

14. Mounting Concept:
Tapered bore bearings mount to the
shaft with a matching tapered
adapter. As the adapter nut is
tightened, the bearing inner ring is
forced up the taper gripping the shaft.
The inner ring is expanding due to
axial movement up the taper, which
removes internal clearance from the
bearing. The result is a press fit onto
the shaft.

15. Spanner Wrench Mounting
2. Hand Tighten Nut without Lockwasher
3. Do not use hammer and drift. The drift
will severely damage the nut
4. Use a spanner wrench and hammer.
This method will only work for smaller
shaft diameters.
5. For larger shaft sizes, use Hydraulic Nut
or Micro - mount screw method.

16. Mounting with Hydraulic Nut
As an option the bearing can also be
mounted with the help of a hydraulic nut.
This is especially helpful for large diameter
units. Pressure from the piston within the
nut presses the bearing inner ring up the
tapered adapter, expanding the inner ring
slightly. Axial movement of the bearing
and clearance removed during the process
can be measured.
As the final internal clearance is achieved,
release the pressure and remove the
Hydraulic nut, Replace it with the standard
nut and washer or locking clip.

17. Mounting with Hydraulic Nut Spherical Bering
with Tapered Bore
Hydraulic Pressure Inlet
Tapered
Hydraulic Adapter
Nut
Piston of Hydraulic Nut
presses on Bearing
Inner Ring

18. Mounting with Hydraulic Nut (cont’d)
Once the Hydraulic nut 1. Re-install Nut
& Lockwasher.
has been removed, install
the lockwasher and
tighten the standard nut.
Once tight, bend the most
2. Tighten Nut.
convenient tang of the
washer into the slot on
the OD of the nut. This
acts as a lock washer.
Larger units use a locking 3. Bend
washer tang or
clip. install locking
Do not drive the bearing further up the taper! clip.

19. Tips for Measuring the Clearance
During installation of the bearing, which is likely
hanging on the shaft, it may be very helpful to
sling the bearing, shifting the internal clearance
to the top where clearance is easier to measure.
As a comparison, clearance measure on the
bottom should be the same as that measured on
the top. Due to the weight of the rollers and
sliding the feeler gauge under the roller,
clearances tend to be a little more difficult and
tend to read less than on the top. Practice will
minimize the differences. Clearance can be
measured on each side for verification.
Note: Do not roll the bearing over the feeler gauge in
an attempt to measure the clearance. This will not
yield an accurate result of clearance!

20. More Tips when Measuring….
BEARING
As a measurement suggestion and prior to each
measurement, roll the bearing to center rollers
for measurement. A helpful tip is to lightly press
the roller inward with your thumb, i.e…. toward
the center of the bearing, so it remains stable.
This also creates a consistent measurement
technique. Make sure the feeler gauge passes
over the top of the roller and not the edge. A
light saw-tooth action will help the feeler to pass.
The roller is crowned so the measurement at the
edge will be slightly larger than at the center.
Measure clearance with feeler gauge over the center of the roller.
Document the measurements for order documentation.

21. Mounted Spherical Bearings Applications
Mining Conveyors
– Underground &
Overland
Other
Applications -
Fans, Shaker
Screens,
Industrial Fans

22. Example: SAF 22528 x 4-15/16, Bearing 22228K C3 W33, (Bore 140mm)

23. Example:
SAF22528 x 4-15/16
Bearing 22228 K C3
Pressure: 339 psi
Clearance Reduction
0.025” min.
Axial Drive Up:
0.0317”
Measure To Be Sure!

24. Optional Mounting Method….
Installation
Adapter Nut with Mounting Screws
Tighten Oval Point Set Screws using a
torque wrench pressing on the bearing
inner ring, removing the clearance as
torque increases. Measuring clearance at
each torque interval.

25. Housing, Seals and Lube
BEARING
Once the bearing has been properly tightened and the final running
clearance documented, housing assembly can begin.
Position the seals so they align with the housing and lower the
bearing into the housing. The seals should fit into the seal grooves.
Hand pack the seal grooves in the housing base with grease. Also
hand pack the bearing between all of the rollers with grease once the
bearing is resting in the housing base. The base should then be
filled 1/3 to 1/2 full as a guide.
To assist final housing mounting, the fixing ring can be installed on
either side of the bearing to help with base bolt hole positioning.
One bearing must have the fixing ring, the other end should remain
free to float (no fixing ring). Position the floating bearing in the center
of the bearing area so it can expand or contract as needed.

26. Installation
Bearing Removal and Reuse?
1. Visually inspect the Spherical Roller Bearing for
surface defects including brinelling, pits, staining,
or graying of the races. See included defect chart.
2. The Housing cost is usually less than the SRB,
and seal grooves wear, inspect before re-use.
3. Always replace the Adapter and Seals.
4. In general, it is not advisable to re-use bearings.

27. Introduction – Housing Features
BEARING
Optional Oil Sight Glass Large Lube Plugs/Drains & Face
(cross-port drilled) Grooves for Dust Cover Seal
Optional Temp. Strip
Matched Cap & Base, Offset Dowel for Solid Base for Strength
& Large Pry Slots Proper Assembly and Oil Cross-port

28. Mounted Roller Bearings Accessories
BEARING
End Covers
Auxiliary Seals
Stabilizing Rings & Spanner Wrenches
O-ring Labyrinth Seals

29. Mounted Spherical Bearing Accessories
BEARING
Hydraulic Nuts
for Bearing
Installation
Hydraulic Adapter
Sleeves for
Assisted Bearing
Removal

30. P.T. International Corp.
SAF, SDAF &
Metric Split Blocks
Installation &
General Training

31. Bearing Autopsy
Installation
1. Bearings are a systems flight
recorder. Wear patterns on the
races tell a story and provide
helpful application information.
Part: Outer ring of a spherical roller bearing
2. When the shaft rotates, the history Symptom: Peeling occurs near the shoulder of
the raceway over the entire circumference and on
builds on the Outer race. the center of the rolling surfaces below
Cause: Poor lubrication
3. Careful inspection review of load
zone, wear pattern, surface marks
and discolorations will guide the
user as to why the failure occurred.

32. Bearing Autopsy – Typical Problems 1
Installation
Part: Inner ring of a spherical Part: Outer ring of a spherical
roller bearing roller bearing
Symptom: Creep occurs over
Symptom: Creep accompanied entire circumference of outside
by scoring of bore surface surface
Cause: Insufficient interference Cause: Loose fit between outer
ring and housing

33. Bearing Autopsy – Typical Problems 2
Installation
Part: Outer ring of a spherical roller Part: Outer ring of a Cylindrical
bearing bearing
Symptom: False brinelling occurs
Symptom: Wear having a wavy or
on the raceway
concave-and-convex texture on
loaded side of raceway surface Cause: Vibration from an external
source while stationary
Cause: Entry of debris under
repeated vibration while stationary

34. Bearing Autopsy – Typical Problems 3
Installation
Part: Inner ring of an angular Part: Outer ring in Photo
contact ball bearing
Symptom: Raceway discoloration,
Symptom: Raceway discoloration, melting occurs at ball pitch
melting occurs at ball pitch intervals
intervals
Cause: Excessive preload
Cause: Excessive preload

35. Bearing Autopsy – Typical Problems 4
Installation
Part: Outer ring of Inner ring on Part: Inner ring of a spherical roller
Right bearing
Symptom: Flaking of only one Symptom: Flaking of only one
raceway over its entire raceway over its entire
circumference circumference
Cause: Excessive axial load Cause: Excessive axial load

36. After Hours Service 7-24
Toll Free 1-800-763-4434
www.ptintl.com
Thank You!