Four-bolt round flange roller bearing units consist of a spherical roller bearing mounted in a cast iron housing that can support rotating shafts through walls, bulkheads or other flat surfaces. The units are shaft-ready, pre-assembled and pre-greased, for installation right out of the box. Locating and non-locating variants can be specified while the standard set screw mounting accommodates rotation in both directions. End covers are optional.
| Metric/inch series |
Inch
|
| Bearing insert |
Spherical roller bearing
|
| Bearing position |
Locating
|
| Locking method |
Set screws
|
| Bearing housing seal type |
Radial lip seal
|
| da |
87.313 mm
|
Shaft diameter |
|---|---|---|
| A |
77.788 mm
|
Housing height |
| A1 |
28.575 mm
|
Housing foot height |
| A2 |
42.069 mm
|
Centre line of free bearing |
| A5 |
114.697 mm
|
Width including end cover |
| B |
102.394 mm
|
Inner ring width |
| J |
241.3 mm
|
Bolt pitch diameter |
| L |
282.575 mm
|
Housing outside diameter |
| N |
20.638 mm
|
Bolt hole diameter |
| s |
36.513 mm
|
Centre line unit to side face of inner ring |
| S |
0.794 mm
|
Centre line of “fixed” bearing |
| GN |
1/8-27 NPT
|
Thread of grease fitting |
|---|
| Basic dynamic load rating | C |
253 kN
|
|---|---|---|
| Basic static load rating | C0 |
340 kN
|
| Fatigue load limit | Pu |
37.5 kN
|
| Limiting speed |
2 300 r/min
|
|
| Limiting value | e |
0.31
|
| Calculation factor | Y1 |
2.2
|
| Calculation factor | Y2 |
3.3
|
| Calculation factor | Y0 |
2.2
|
| Bearing mean diameter | dm |
124.968 mm
|
| Axial holding force of the locking mechanism | Pa |
4 kN
|
| Mass bearing unit |
17.2 kg
|
| Attachment bolt diameter | G |
19.05 mm
|
|---|---|---|
| Set screws |
1/2″-20 UNF-3A x 7/8″
|
|
| Number of set screws |
2
|
|
| Tightening torque for set screws |
70.051 N·m
|
|
| Grease quantity for relubrication |
13 g
|
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