Bearings, units and housings -- Roller bearings -- Spherical roller bearings -- Spherical roller bearings -- SKF 21308 EK
21308 EK
SKF Explorer
Dimensions
| d | 40 | mm | |
| D | 90 | mm | |
| B | 23 | mm | |
| d2 | ≈ | 60 | mm |
| D1 | ≈ | 79.8 | mm |
| b | 5.5 | mm | |
| K | 3 | mm | |
| r1,2 | min. | 1.5 | mm |
Tapered bore, taper 1:12
Abutment dimensions
| Da | max. | 81 | mm |
| ra | max. | 1.5 | mm |
Calculation data
| Basic dynamic load rating | C | 107 | kN | |
| Basic static load rating | C0 | 108 | kN | |
| Fatigue load limit | Pu | 12 | kN | |
| Reference speed | 7000 | r/min | ||
| Limiting speed | 9500 | r/min | ||
| Calculation factor | e | 0.24 | ||
| Calculation factor | Y1 | 2.8 | ||
| Calculation factor | Y2 | 4.2 | ||
| Calculation factor | Y0 | 2.8 |
Mass
| Mass bearing | 0.74 | kg |
Mounting information
| Recommended lock nut tightening angle | a | 115 | ° |