Pillow (plummer) block bearing units consisting of an insert bearing mounted in a composite or cast metal 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 |
North American standard
|
| Purpose specific |
For material handling applications
|
| Material, housing |
Cast iron
|
| Sealing, bearing |
Seal and flinger on both sides
|
| Sealing type, bearing |
Contact, standard
|
| Sealing, unit |
Optional end cover
|
| Coating |
Without
|
| d |
31.75 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 46.1 mm
|
Shoulder diameter of inner ring |
| d2 |
51.1 mm
|
Outside diameter of locking ring |
| A |
45.8 mm
|
Base width |
| A1 |
26.7 mm
|
Top width |
| A5 |
22 mm
|
Standout of end cover |
| B |
37.6 mm
|
Width of inner ring |
| B1 |
51.1 mm
|
Overall bearing width |
| B4 |
6.75 mm
|
Distance from locking device side face to thread centre |
| H |
47.63 mm
|
Height of spherical seat centre |
| H1 |
18.26 mm
|
Foot height |
| H2 |
93.66 mm
|
Overall height |
| J |
127 mm
|
Distance between attachment bolts |
| J |
max. 134.94 mm
|
Distance between attachment bolts |
| J |
min. 119.06 mm
|
Distance between attachment bolts |
| L |
166.69 mm
|
Overall length |
| N |
16.67 mm
|
Diameter of attachment bolt hole |
| N1 |
20.64 mm
|
Length of attachment bolt hole |
| s1 |
32.3 mm
|
Distance from locking device side face to raceway centre |
| RG |
1/8-27 NPT
|
Housing thread for the grease fitting |
|---|---|---|
| R1 |
1.8 mm
|
Axial position of the housing thread |
| Rα |
45 °
|
Angular position of the housing thread |
| DN |
6.579 mm
|
Diameter of head sphere of grease fitting |
|---|---|---|
| SWN |
11.113 mm
|
Hexagonal key size for the grease fitting |
| GN |
1/8-27 NPT
|
Thread of grease fitting |
| Basic dynamic load rating | C |
25.5 kN
|
|---|---|---|
| Basic static load rating | C0 |
15.3 kN
|
| Fatigue load limit | Pu |
0.655 kN
|
| Limiting speed |
5 300 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
| Mass bearing unit |
1.65 kg
|
| Set screw | G2 |
3/8-24 UNF
|
|---|---|---|
| Hexagonal key size for set screw |
4.763 mm
|
|
| Recommended tightening torque for set screw |
16.5 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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