Single row cylindrical roller bearings of the NU design without an inner ring consist of an outer ring with a roller and cage assembly. They are typically used in applications where hardened and ground raceways are provided on the shaft. Without the inner ring, a larger shaft diameter can be used to provide a stronger, stiffer shaft. The bearings can accommodate axial displacement in both directions, limited only by the width of the raceway on the shaft.
| SKF performance class |
SKF Explorer
|
| Fw |
217 mm
|
Diameter under rollers |
|---|---|---|
| D |
320 mm
|
Outside diameter |
| C |
52 mm
|
Width |
| D1 |
≈ 278.6 mm
|
Shoulder diameter outer ring |
| r1,2 |
min. 4 mm
|
Corner radius |
| da |
max. 230 mm
|
Abutment diameter shaft |
|---|---|---|
| Da |
max. 302.2 mm
|
Abutment diameter housing |
| ra |
max. 3 mm
|
Fillet radius |
| Basic dynamic load rating | C |
720 kN
|
|---|---|---|
| Basic static load rating | C0 |
850 kN
|
| Fatigue load limit | Pu |
88 kN
|
| Reference speed |
2 200 r/min
|
|
| Limiting speed |
3 600 r/min
|
|
| Calculation factor | kr |
0.15
|
| Limiting value | e |
0.2
|
| Calculation factor | Y |
0.6
|
| Mass bearing |
13.9 kg
|
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