Pillow (plummer) block ball bearing units consist of an insert bearing mounted in a composite housing that is lightweight but robust and has excellent corrosion resistance. This variant is suitable for applications with both constant and alternating directions of rotation. It has an inner ring extended on both sides and is locked onto the shaft by tightening a set screw on the inner ring, making it easy to mount.
| Compliance with standard |
ISO with boundary dimension deviations
|
| Purpose specific |
For food and beverage applications
|
| Material, housing |
Composite for the SKF Food Line
|
| Sealing, bearing |
Seal and flinger on both sides
|
| Sealing type, bearing |
Contact, multiple
|
| Sealing, unit |
Optional end cover
|
| Coating |
Zinc-coated bearing
|
| d |
38.1 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 51.8 mm
|
Shoulder diameter of inner ring |
| A |
48 mm
|
Base width |
| A1 |
30 mm
|
Top width |
| A5 |
33 mm
|
Width including end cover |
| B |
49.2 mm
|
Width of inner ring |
| B1 |
49.2 mm
|
Overall bearing width |
| B4 |
8 mm
|
Distance from locking device side face to thread centre |
| H |
49.2 mm
|
Height of spherical seat centre |
| H1 |
19 mm
|
Foot height |
| H2 |
99 mm
|
Overall height |
| J |
136 mm
|
Distance between attachment bolts |
| J |
max. 143 mm
|
Distance between attachment bolts |
| J |
min. 129 mm
|
Distance between attachment bolts |
| L |
176 mm
|
Overall length |
| N |
14.5 mm
|
Diameter of attachment bolt hole |
| N1 |
21.5 mm
|
Length of attachment bolt hole |
| s1 |
30.2 mm
|
Distance from locking device side face to raceway centre |
| Basic dynamic load rating | C |
30.7 kN
|
|---|---|---|
| Basic static load rating | C0 |
19 kN
|
| Fatigue load limit | Pu |
0.8 kN
|
| Limiting speed |
2 800 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
| Mass bearing unit |
0.96 kg
|
| Set screw | G2 |
5/16-24 UNF
|
|---|---|---|
| Hexagonal key size for set screw |
3.969 mm
|
|
| Recommended tightening torque for set screw |
6.5 N·m
|
|
| Recommended diameter for attachment bolts, mm | G |
12 mm
|
| Recommended diameter for attachment bolts, inch | G |
0.5 in
|
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