Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71924 CD/P4A
71924 CD/P4A
Dimensions
| d | 120 | mm | |
| D | 165 | mm | |
| B | 22 | mm | |
| d1 | 133.9 | mm | |
| d2 | 133.9 | mm | |
| D1 | 151.1 | mm | |
| r1,2 | min. | 1.1 | mm |
| r3,4 | min. | 0.6 | mm |
| a | 30.2 | mm |
Abutment dimensions
| da | min. | 126 | mm |
| db | min. | 126 | mm |
| Da | max. | 159 | mm |
| Db | max. | 161 | mm |
| ra | max. | 1 | mm |
| rb | max. | 0.6 | mm |
| dn | 137.6 | mm |
Calculation data
| Basic dynamic load rating | C | 78 | kN | |
| Basic static load rating | C0 | 91.5 | kN | |
| Fatigue load limit | Pu | 3.25 | kN | |
| Attainable speed for grease lubrication | 7500 | r/min | ||
| Attainable speed for oil-air lubrication | 12000 | r/min | ||
| Ball diameter | Dw | 14.288 | mm | |
| Number of balls | z | 28 | ||
| Reference grease quantity | Gref | 15.3 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 290 | N | |
| Static axial stiffness, preload class A | 127 | N/µm | ||
| Preload class B | GB | 580 | N | |
| Static axial stiffness, preload class B | 174 | N/µm | ||
| Preload class C | GC | 1160 | N | |
| Static axial stiffness, preload class C | 246 | N/µm | ||
| Preload class D | GD | 2320 | N | |
| Static axial stiffness, preload class D | 361 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.26 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.04 | ||
| Calculation factor | f2C | 1.09 | ||
| Calculation factor | f2D | 1.15 | ||
| Calculation factor | fHC | 1 | ||
| Calculation factor | f0 | 16.5 | ||
Mass
| Mass bearing | 1.15 | kg |