Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71907 CD/HCP4A
71907 CD/HCP4A
Dimensions
| d | 35 | mm | |
| D | 55 | mm | |
| B | 10 | mm | |
| d1 | 41.6 | mm | |
| d2 | 41.6 | mm | |
| D1 | 48.4 | mm | |
| r1,2 | min. | 0.6 | mm |
| r3,4 | min. | 0.3 | mm |
| a | 11.1 | mm |
Abutment dimensions
| da | min. | 38.2 | mm |
| db | min. | 38.2 | mm |
| Da | max. | 51.8 | mm |
| Db | max. | 53.6 | mm |
| ra | max. | 0.6 | mm |
| rb | max. | 0.3 | mm |
| dn | 43 | mm |
Calculation data
| Basic dynamic load rating | C | 9.75 | kN | |
| Basic static load rating | C0 | 6.55 | kN | |
| Fatigue load limit | Pu | 0.275 | kN | |
| Attainable speed for grease lubrication | 32000 | r/min | ||
| Attainable speed for oil-air lubrication | 45000 | r/min | ||
| Ball diameter | Dw | 5.556 | mm | |
| Number of balls | z | 21 | ||
| Reference grease quantity | Gref | 0.93 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 35 | N | |
| Static axial stiffness, preload class A | 35 | N/µm | ||
| Preload class B | GB | 70 | N | |
| Static axial stiffness, preload class B | 47 | N/µm | ||
| Preload class C | GC | 140 | N | |
| Static axial stiffness, preload class C | 64 | N/µm | ||
| Preload class D | GD | 280 | N | |
| Static axial stiffness, preload class D | 91 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.1 | ||
| 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 | 10.4 | ||
Mass
| Mass bearing | 0.068 | kg |