1208 EKTN9
Self-aligning ball bearing with tapered boreSelf-aligning ball bearings, with a tapered bore, 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. The tapered bore facilitates ease of mounting via adapter sleeves or withdrawal sleeves.
- Ease of mounting via adapter sleeves or withdrawal sleeves
- Accommodate static and dynamic misalignment
- Excellent high-speed performance
- Excellent light load performance
- Low friction
Description
| Bore type | Tapered 1:12 |
Dimensions
| d | 40 mm | Bore diameter |
|---|---|---|
| D | 80 mm | Outside diameter |
| B | 18 mm | Width |
| d1 | ≈ 53.85 mm | Shoulder diameter inner ring |
| D1 | ≈ 67.5 mm | Shoulder diameter outer ring |
| r1,2 | min. 1.1 mm | Chamfer dimension |
Abutment dimensions
| Da | max. 73 mm | Abutment diameter housing |
|---|---|---|
| ra | max. 1.1 mm | Fillet radius |
Calculation data
| Basic dynamic load rating | C | 19.9 kN |
|---|---|---|
| Basic static load rating | C0 | 6.95 kN |
| Fatigue load limit | Pu | 0.355 kN |
| Reference speed | 18 000 r/min | |
| Limiting speed | 11 000 r/min | |
| Permissible angular misalignment | α | 2.5 ° |
| Calculation factor | kr | 0.04 |
| Limiting value | e | 0.22 |
| Calculation factor | Y0 | 2.8 |
| Calculation factor | Y1 | 2.9 |
| Calculation factor | Y2 | 4.5 |
Mass
| Mass bearing | 0.42 kg |
Tolerances and clearances
Bearing data
Bearing interfaceS
