21311 EK
Spherical roller bearing with tapered bore and relubrication featuresSpherical roller bearings can accommodate heavy loads in both directions. They are self-aligning and accommodate misalignment and shaft deflections, with virtually no increase in friction or temperature. The design includes features to facilitate relubrication. The bearings can be used in a modular system, including housings, sleeves and nuts.
- Accommodate misalignment
- High load carrying capacity
- Relubrication features
- Low friction and long service life
- Increased wear resistance
Description
| SKF performance class | SKF Explorer |
| Bore type | Tapered 1:12 |
Dimensions
| d | 55 mm | Bore diameter |
|---|---|---|
| D | 120 mm | Outside diameter |
| B | 29 mm | Width |
| d2 | ≈ 72.7 mm | Shoulder diameter of inner ring |
| D1 | ≈ 96.2 mm | Shoulder/recess diameter of outer ring |
| b | 6 mm | Width of lubrication groove |
| K | 3 mm | Diameter of lubrication hole |
| r1,2 | min. 2 mm | Chamfer dimension |
Abutment dimensions
| Da | max. 109 mm | Diameter of housing abutment |
|---|---|---|
| ra | max. 2 mm | Radius of fillet |
Calculation data
| Basic dynamic load rating | C | 159 kN |
|---|---|---|
| Basic static load rating | C0 | 166 kN |
| Fatigue load limit | Pu | 18.6 kN |
| Reference speed | 5 600 r/min | |
| Limiting speed | 7 500 r/min | |
| Limiting value | e | 0.24 |
| Calculation factor | Y1 | 2.8 |
| Calculation factor | Y2 | 4.2 |
| Calculation factor | Y0 | 2.8 |
Mass
| Mass | 1.65 kg |
Mounting information
| Recommended tightening angle for lock nut | α | 115 ° |
|---|
Tolerance class
| Dimensional tolerances | Normal |
| Radial run-out | P5 |
Tolerances and clearances
Bearing interfaces
