1218
Self-aligning ball bearingSelf-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, which can be caused, for example, by shaft deflection.
- Accommodate static and dynamic misalignment
- Excellent high-speed performance
- Excellent light load performance
- Low friction
Description
| Bore type | Cylindrical |
Dimensions
| d | 90 mm | Bore diameter |
|---|---|---|
| D | 160 mm | Outside diameter |
| B | 30 mm | Width |
| d1 | ≈ 112.5 mm | Shoulder diameter inner ring |
| D1 | ≈ 138.7 mm | Shoulder diameter outer ring |
| r1,2 | min. 2 mm | Chamfer dimension |
Abutment dimensions
| da | min. 101 mm | Abutment diameter shaft |
|---|---|---|
| Da | max. 149 mm | Abutment diameter housing |
| ra | max. 2 mm | Fillet radius |
Calculation data
| Basic dynamic load rating | C | 57.2 kN |
|---|---|---|
| Basic static load rating | C0 | 23.6 kN |
| Fatigue load limit | Pu | 1.08 kN |
| Reference speed | 8 500 r/min | |
| Limiting speed | 5 300 r/min | |
| Permissible angular misalignment | α | 2.5 ° |
| Calculation factor | kr | 0.04 |
| Limiting value | e | 0.17 |
| Calculation factor | Y0 | 4 |
| Calculation factor | Y1 | 3.7 |
| Calculation factor | Y2 | 5.7 |
Mass
| Mass bearing | 2.5 kg |
Tolerances and clearances
Bearing data
Bearing interfaceS
