Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71917 CB/HCP4A
71917 CB/HCP4A
Dimensions
| d | 85 | mm | |
| D | 120 | mm | |
| B | 18 | mm | |
| d1 | 98.2 | mm | |
| d2 | 96.7 | mm | |
| D2 | 110.2 | mm | |
| r1,2 | min. | 1.1 | mm |
| r3,4 | min. | 0.6 | mm |
| a | 25.5 | mm |
Abutment dimensions
| da | min. | 91 | mm |
| db | min. | 91 | mm |
| Da | max. | 114 | mm |
| Db | max. | 116.8 | mm |
| ra | max. | 1 | mm |
| rb | max. | 0.6 | mm |
| dn | 99.2 | mm |
Calculation data
| Basic dynamic load rating | C | 22.1 | kN | |
| Basic static load rating | C0 | 26 | kN | |
| Fatigue load limit | Pu | 0.68 | kN | |
| Attainable speed for grease lubrication | 18000 | r/min | ||
| Attainable speed for oil-air lubrication | 28000 | r/min | ||
| Ball diameter | Dw | 6.747 | mm | |
| Number of balls | z | 37 | ||
| Reference grease quantity | Gref | 6.46 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 54 | N | |
| Static axial stiffness, preload class A | 58 | N/µm | ||
| Preload class B | GB | 110 | N | |
| Static axial stiffness, preload class B | 76 | N/µm | ||
| Preload class C | GC | 325 | N | |
| Static axial stiffness, preload class C | 121 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.11 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.03 | ||
| Calculation factor | f2C | 1.08 | ||
| Calculation factor | fHC | 1.01 | ||
| Calculation factor | f0 | 10 | ||
Mass
| Mass bearing | 0.54 | kg |