Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71917 CD/HCP4A
71917 CD/HCP4A
Dimensions
| d | 85 | mm | |
| D | 120 | mm | |
| B | 18 | mm | |
| d1 | 95.8 | mm | |
| d2 | 95.8 | mm | |
| D1 | 109.2 | mm | |
| r1,2 | min. | 1.1 | mm |
| r3,4 | min. | 0.6 | mm |
| a | 22.8 | mm |
Abutment dimensions
| da | min. | 91 | mm |
| db | min. | 91 | mm |
| Da | max. | 114 | mm |
| Db | max. | 116 | mm |
| ra | max. | 1 | mm |
| rb | max. | 0.6 | mm |
| dn | 98.6 | mm |
Calculation data
| Basic dynamic load rating | C | 46.2 | kN | |
| Basic static load rating | C0 | 48 | kN | |
| Fatigue load limit | Pu | 2.04 | kN | |
| Attainable speed for grease lubrication | 14000 | r/min | ||
| Attainable speed for oil-air lubrication | 20000 | r/min | ||
| Ball diameter | Dw | 11.112 | mm | |
| Number of balls | z | 25 | ||
| Reference grease quantity | Gref | 7.2 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 170 | N | |
| Static axial stiffness, preload class A | 99 | N/µm | ||
| Preload class B | GB | 340 | N | |
| Static axial stiffness, preload class B | 135 | N/µm | ||
| Preload class C | GC | 680 | N | |
| Static axial stiffness, preload class C | 191 | N/µm | ||
| Preload class D | GD | 1360 | N | |
| Static axial stiffness, preload class D | 279 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.2 | ||
| 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 | 16.2 | ||
Mass
| Mass bearing | 0.45 | kg |