Pillow (plummer) block ball bearing units consisting of an insert bearing mounted in a pressed steel housing that can be bolted to a support surface. In addition to being part of a unit, some pillow block housings for insert bearings are available as separate components. The SKF assortment includes units that are compliant with several industrial standards and meet many requirements.
| Compliance with standard |
ISO with centre height deviation
|
| Purpose specific |
For material handling applications
|
| Material, housing |
Pressed steel
|
| Sealing, bearing |
Seal and flinger on both sides
|
| Sealing type, bearing |
Contact, standard
|
| Sealing, unit |
Without
|
| Coating |
Zinc-coated housing
|
| d |
20 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 28.2 mm
|
Shoulder diameter of inner ring |
| A |
32 mm
|
Base width |
| A1 |
21 mm
|
Top width |
| B |
31 mm
|
Width of inner ring |
| B4 |
4.5 mm
|
Distance from locking device side face to thread centre |
| H |
25.3 mm
|
Height of spherical seat centre |
| H1 |
3 mm
|
Foot height |
| H2 |
50.5 mm
|
Overall height |
| J |
76 mm
|
Distance between attachment bolts |
| L |
98.5 mm
|
Overall length |
| N |
9.6 mm
|
Diameter of attachment bolt hole |
| s1 |
18.3 mm
|
Distance from locking device side face to raceway centre |
| Basic dynamic load rating | C |
12.7 kN
|
|---|---|---|
| Basic static load rating | C0 |
6.55 kN
|
| Fatigue load limit | Pu |
0.28 kN
|
| Permissible radial housing load |
max. 1.7 kN
|
|
| Limiting speed |
8 500 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
| Mass bearing unit |
0.24 kg
|
| Set screw | G2 |
M6x0.75
|
|---|---|---|
| Hexagonal key size for set screw |
3 mm
|
|
| Recommended tightening torque for set screw |
4 N·m
|
|
| Recommended diameter for attachment bolts, mm | G |
8 mm
|
| Recommended diameter for attachment bolts, inch | G |
0.3125 in
|
| Housing | P 47 |
| Bearing | YAR 204-2F |
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