Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71934 CD/HCP4A
71934 CD/HCP4A
Dimensions
| d | 170 | mm | |
| D | 230 | mm | |
| B | 28 | mm | |
| d1 | 188.5 | mm | |
| d2 | 188.5 | mm | |
| D1 | 211.5 | mm | |
| r1,2 | min. | 2 | mm |
| r3,4 | min. | 1 | mm |
| a | 40.9 | mm |
Abutment dimensions
| da | min. | 179 | mm |
| db | min. | 179 | mm |
| Da | max. | 221 | mm |
| Db | max. | 225 | mm |
| ra | max. | 2 | mm |
| rb | max. | 1 | mm |
| dn | 193.5 | mm |
Calculation data
| Basic dynamic load rating | C | 133 | kN | |
| Basic static load rating | C0 | 166 | kN | |
| Fatigue load limit | Pu | 5.1 | kN | |
| Attainable speed for grease lubrication | 7000 | r/min | ||
| Attainable speed for oil-air lubrication | 10000 | r/min | ||
| Ball diameter | Dw | 19.05 | mm | |
| Number of balls | z | 29 | ||
| Reference grease quantity | Gref | 36 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 500 | N | |
| Static axial stiffness, preload class A | 190 | N/µm | ||
| Preload class B | GB | 1000 | N | |
| Static axial stiffness, preload class B | 262 | N/µm | ||
| Preload class C | GC | 2000 | N | |
| Static axial stiffness, preload class C | 371 | N/µm | ||
| Preload class D | GD | 4000 | N | |
| Static axial stiffness, preload class D | 547 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.3 | ||
| 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 | 16.5 | ||
Mass
| Mass bearing | 2.34 | kg |