Pillow (plummer) block ball bearing units consist of an insert bearing mounted in a cast iron housing that can be bolted to a support surface. This variant is suitable for applications with both constant and alternating directions of rotation. It is locked with an adapter sleeve, enabling quick and easy mounting onto the shaft. Adapter sleeve needs to be ordered separately.
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Order adapter sleeve separately
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| Compliance with standard |
JIS
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| Material, housing |
Cast iron
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| Sealing, bearing |
Seal and flinger on both sides
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| Sealing type, bearing |
Contact, standard
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| Sealing, unit |
Without
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| Coating |
Without
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| d |
55 mm
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Bore diameter |
|---|---|---|
| d1 |
≈ 75.64 mm
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Shoulder diameter of inner ring |
| d3 |
80 mm
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Outside diameter of lock nut |
| A |
65 mm
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Base width |
| A1 |
47 mm
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Top width |
| B |
42.5 mm
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Width of inner ring |
| B1 |
42.4 mm
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Overall bearing width |
| B1 |
62 mm
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Width of sleeve |
| H |
69.8 mm
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Height of spherical seat centre |
| H1 |
26.5 mm
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Foot height |
| H2 |
137.5 mm
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Overall height |
| J |
188.5 mm
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Distance between attachment bolts |
| J |
max. 198 mm
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Distance between attachment bolts |
| J |
min. 179 mm
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Distance between attachment bolts |
| L |
241 mm
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Overall length |
| N |
20 mm
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Diameter of attachment bolt hole |
| N1 |
29.5 mm
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Length of attachment bolt hole |
| s1 |
33.7 mm
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Distance from locking device side face to raceway centre |
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Value specified for s1 is approximate and before the sleeve is driven into the bearing bore (sleeve and inner ring bore at starting position).
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| RG |
1/4-28 UNF
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Housing thread for the grease fitting |
|---|---|---|
| R1 |
5.5 mm
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Axial position of the housing thread |
| Rα |
45 °
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Angular position of the housing thread |
| DN |
6.5 mm
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Diameter of head sphere of grease fitting |
|---|---|---|
| SWN |
7 mm
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Hexagonal key size for the grease fitting |
| GN |
1/4-28 SAE-LT
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Thread of grease fitting |
| J6 |
223 mm
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Distance of dowel pins |
|---|---|---|
| J7 |
23.5 mm
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Axial offset of dowel pins |
| N4 |
4 mm
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Recommended diameter for dowel pins |
| Basic dynamic load rating | C |
52.7 kN
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|---|---|---|
| Basic static load rating | C0 |
36 kN
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| Fatigue load limit | Pu |
1.53 kN
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| Limiting speed |
3 400 r/min
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| Mass bearing unit |
4.1 kg
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| Associated spanner |
HN 12
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| Recommended lock nut tightening angle | α |
95 °
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| Recommended diameter for attachment bolts, mm | G |
16 mm
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| Recommended diameter for attachment bolts, inch | G |
0.625 in
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