Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71910 CB/P4A
71910 CB/P4A
Dimensions
| d | 50 | mm | |
| D | 72 | mm | |
| B | 12 | mm | |
| d1 | 57.95 | mm | |
| d2 | 56.9 | mm | |
| D2 | 66.04 | mm | |
| r1,2 | min. | 0.6 | mm |
| r3,4 | min. | 0.3 | mm |
| a | 16.7 | mm |
Abutment dimensions
| da | min. | 53.2 | mm |
| db | min. | 53.2 | mm |
| Da | max. | 68.8 | mm |
| Db | max. | 70 | mm |
| ra | max. | 0.6 | mm |
| rb | max. | 0.3 | mm |
| dn | 58.7 | mm |
Calculation data
| Basic dynamic load rating | C | 10.4 | kN | |
| Basic static load rating | C0 | 10.2 | kN | |
| Fatigue load limit | Pu | 0.265 | kN | |
| Attainable speed for grease lubrication | 26000 | r/min | ||
| Attainable speed for oil-air lubrication | 38000 | r/min | ||
| Ball diameter | Dw | 4.762 | mm | |
| Number of balls | z | 29 | ||
| Reference grease quantity | Gref | 1.89 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 26 | N | |
| Static axial stiffness, preload class A | 31 | N/µm | ||
| Preload class B | GB | 52 | N | |
| Static axial stiffness, preload class B | 40 | N/µm | ||
| Preload class C | GC | 155 | N | |
| Static axial stiffness, preload class C | 65 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.09 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.02 | ||
| Calculation factor | f2C | 1.07 | ||
| Calculation factor | fHC | 1 | ||
| Calculation factor | f0 | 9.8 | ||
Mass
| Mass bearing | 0.13 | kg |