Large-size self-aligning ball bearings have two rows of balls, a common sphered raceway in the outer ring and two deep uninterrupted raceway grooves in the inner ring. They are insensitive to angular misalignment of the shaft relative to the housing. The annular lubrication groove in the outer ring and holes in the inner and outer rings facilitate ease of relubrication.
| Bore type | Cylindrical |
| d | 240 mm | Bore diameter |
|---|---|---|
| D | 320 mm | Outside diameter |
| B | 60 mm | Width |
| d1 | ≈ 268.5 mm | Shoulder diameter inner ring |
| D1 | ≈ 297.6 mm | Shoulder diameter outer ring |
| b | 8.3 mm | Width annular lubrication groove at outer ring |
| K | 4.5 mm | Diameter lubrication hole (outer ring) |
| r1,2 | min. 2.1 mm | Chamfer dimension |
| da | min. 251 mm | Abutment diameter shaft |
|---|---|---|
| Da | max. 309 mm | Abutment diameter housing |
| ra | max. 2 mm | Fillet radius |
| Basic dynamic load rating | C | 60.5 kN |
|---|---|---|
| Basic static load rating | C0 | 30.5 kN |
| Fatigue load limit | Pu | 0.98 kN |
| Reference speed | 3 600 r/min | |
| Limiting speed | 2 200 r/min | |
| Permissible angular misalignment | α | 3 ° |
| Calculation factor | kr | 0.015 |
| Limiting value | e | 0.16 |
| Calculation factor | Y0 | 4 |
| Calculation factor | Y1 | 3.9 |
| Calculation factor | Y2 | 6.1 |
General bearing specifications
Bearing interfaces
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