Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71910 CD/HCP4A
71910 CD/HCP4A
Dimensions
| d | 50 | mm | |
| D | 72 | mm | |
| B | 12 | mm | |
| d1 | 57.1 | mm | |
| d2 | 57.1 | mm | |
| D1 | 64.9 | mm | |
| r1,2 | min. | 0.6 | mm |
| r3,4 | min. | 0.3 | mm |
| a | 14.2 | mm |
Abutment dimensions
| da | min. | 53.2 | mm |
| db | min. | 53.2 | mm |
| Da | max. | 68.8 | mm |
| Db | max. | 70.6 | mm |
| ra | max. | 0.6 | mm |
| rb | max. | 0.3 | mm |
| dn | 58.7 | mm |
Calculation data
| Basic dynamic load rating | C | 13.5 | kN | |
| Basic static load rating | C0 | 10.4 | kN | |
| Fatigue load limit | Pu | 0.44 | kN | |
| Attainable speed for grease lubrication | 22000 | r/min | ||
| Attainable speed for oil-air lubrication | 34000 | r/min | ||
| Ball diameter | Dw | 6.35 | mm | |
| Number of balls | z | 25 | ||
| Reference grease quantity | Gref | 1.74 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 50 | N | |
| Static axial stiffness, preload class A | 47 | N/µm | ||
| Preload class B | GB | 100 | N | |
| Static axial stiffness, preload class B | 63 | N/µm | ||
| Preload class C | GC | 200 | N | |
| Static axial stiffness, preload class C | 87 | N/µm | ||
| Preload class D | GD | 400 | N | |
| Static axial stiffness, preload class D | 122 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.13 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.07 | ||
| Calculation factor | f2C | 1.12 | ||
| Calculation factor | f2D | 1.18 | ||
| Calculation factor | fHC | 1.04 | ||
| Calculation factor | f0 | 10.7 | ||
Mass
| Mass bearing | 0.12 | kg |