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 air 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 |
25.4 mm
|
Bore diameter |
|---|---|---|
| d1 |
≈ 33.74 mm
|
Shoulder diameter of inner ring |
| d2 |
37.4 mm
|
Outside diameter of locking ring |
| A |
38.1 mm
|
Base width |
| A1 |
21.27 mm
|
Top width |
| A5 |
18 mm
|
Standout of end cover |
| B |
34.9 mm
|
Width of inner ring |
| B1 |
44.4 mm
|
Overall bearing width |
| B4 |
4.75 mm
|
Distance from locking device side face to thread centre |
| H |
33.34 mm
|
Height of spherical seat centre |
| H1 |
12.7 mm
|
Foot height |
| H2 |
67.47 mm
|
Overall height |
| J |
104.78 mm
|
Distance between attachment bolts |
| J |
max. 114.305 mm
|
Distance between attachment bolts |
| J |
min. 95.255 mm
|
Distance between attachment bolts |
| L |
139.7 mm
|
Overall length |
| N |
12.7 mm
|
Diameter of attachment bolt hole |
| N1 |
19.05 mm
|
Length of attachment bolt hole |
| s1 |
26.9 mm
|
Distance from locking device side face to raceway centre |
| RG |
1/8-27 NPT
|
Housing thread for the grease fitting |
|---|---|---|
| R1 |
0.3 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 |
14 kN
|
|---|---|---|
| Basic static load rating | C0 |
7.8 kN
|
| Fatigue load limit | Pu |
0.335 kN
|
| Limiting speed |
7 000 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
| Mass bearing unit |
0.76 kg
|
| Set screw | G2 |
1/4-28 UNF
|
|---|---|---|
| Hexagonal key size for set screw |
3.175 mm
|
|
| Recommended tightening torque for set screw |
4 N·m
|
|
| Recommended diameter for attachment bolts, mm | G |
10 mm
|
| Recommended diameter for attachment bolts, inch | G |
0.375 in
|
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