Four-bolt round piloted flange roller bearing units consist of a spherical roller bearing mounted in a cast iron housing that have a machined extension on one side to fit into a precise bulk head opening. 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 |
Heavy-duty seal
|
| da |
87.313 mm
|
Shaft diameter |
|---|---|---|
| Da |
187.325 mm
|
Hub diameter |
| A |
80.963 mm
|
Housing height |
| A1 |
22.225 mm
|
Housing flange height |
| A2 |
13.494 mm
|
Centre line of free bearing |
| A3 |
31.75 mm
|
Hub height |
| A4 |
26.988 mm
|
Housing flange to machined flange face |
| A5 |
113.109 mm
|
Width including end cover |
| A6 |
49.213 mm
|
Flange face to inner ring face |
| B |
102.394 mm
|
Inner ring width |
| J |
219.075 mm
|
Bolt pitch diameter |
| L |
260.35 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 |
1/4-28 UNF
|
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 |
800 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 |
13.4 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
|
|
| Tapped hole for push-out bolt | G2 |
3/4-10 UNC
|
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