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 SKF ConCentra mounting accommodates rotation in both directions. End covers are optional.
| Metric/inch series |
Inch
|
| Bearing insert |
Spherical roller bearing
|
| Bearing position |
Non-locating
|
| Locking method |
SKF ConCentra
|
| Bearing housing seal type |
Radial lip seal
|
| da |
55.563 mm
|
Shaft diameter |
|---|---|---|
| d2 |
81.001 mm
|
Collar outside diameter |
| Da |
127 mm
|
Hub diameter |
| A |
65.088 mm
|
Housing height |
| A1 |
14.288 mm
|
Housing flange height |
| A2 |
14.288 mm
|
Centre line of free bearing |
| A3 |
25.4 mm
|
Hub height |
| A4 |
18.256 mm
|
Housing flange to machined flange face |
| A5 |
101.203 mm
|
Width including end cover |
| A6 |
30.163 mm
|
Flange face to inner ring face |
| B |
65.484 mm
|
Inner ring width |
| J |
152.4 mm
|
Bolt pitch diameter |
| L |
180.975 mm
|
Housing outside diameter |
| N |
14.288 mm
|
Bolt hole diameter |
| s |
32.544 mm
|
Centre line unit to side face of inner ring |
| S |
0.794 mm
|
Centre line of “fixed” bearing |
| T |
65.484 mm
|
Overall unit width |
| GN |
1/4-28 UNF
|
Thread of grease fitting |
|---|
| Basic dynamic load rating | C |
125 kN
|
|---|---|---|
| Basic static load rating | C0 |
127 kN
|
| Fatigue load limit | Pu |
13.7 kN
|
| Limiting speed |
3 100 r/min
|
|
| Limiting value | e |
0.24
|
| Calculation factor | Y1 |
2.8
|
| Calculation factor | Y2 |
4.2
|
| Calculation factor | Y0 |
2.8
|
| Bearing mean diameter | dm |
77.47 mm
|
| Axial holding force of the locking mechanism | Pa |
14.9 kN
|
| Mass bearing unit |
4.49 kg
|
| Attachment bolt diameter | G |
12.7 mm
|
|---|---|---|
| Set screws |
M6-1 x 16mm
|
|
| Number of set screws |
3
|
|
| Tightening torque for set screws |
7.909 N·m
|
|
| Grease quantity for relubrication |
5 g
|
|
| Tapped hole for push-out bolt | G2 |
1/2-13 UNC
|
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