Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71912 CE/P4AL
71912 CE/P4AL
Dimensions
| d | 60 | mm | |
| D | 85 | mm | |
| B | 13 | mm | |
| d1 | 67.75 | mm | |
| d2 | 65.7 | mm | |
| D1 | 77.3 | mm | |
| b | 2.2 | mm | |
| C1 | 6.5 | mm | |
| C2 | 2.5 | mm | |
| C3 | 2 | mm | |
| r1,2 | min. | 1 | mm |
| r3,4 | min. | 0.3 | mm |
| a | 16.8 | mm |
Abutment dimensions
| da | min. | 64.6 | mm |
| db | min. | 62 | mm |
| Da | max. | 80.4 | mm |
| Db | max. | 83 | mm |
| ra | max. | 1 | mm |
| rb | max. | 0.3 | mm |
| dn | 69.6 | mm |
Calculation data
| Basic dynamic load rating | C | 16.3 | kN | |
| Basic static load rating | C0 | 11.8 | kN | |
| Fatigue load limit | Pu | 0.5 | kN | |
| Attainable speed for grease lubrication | 22000 | r/min | ||
| Attainable speed for oil-air lubrication | 34000 | r/min | ||
| Ball diameter | Dw | 7.938 | mm | |
| Number of balls | z | 23 | ||
| Reference grease quantity | Gref | 2.5 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 87 | N | |
| Static axial stiffness, preload class A | 47 | N/µm | ||
| Preload class B | GB | 262 | N | |
| Static axial stiffness, preload class B | 73 | N/µm | ||
| Preload class C | GC | 523 | N | |
| Static axial stiffness, preload class C | 100 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.13 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.04 | ||
| Calculation factor | f2C | 1.08 | ||
| Calculation factor | fHC | 1 | ||
| Calculation factor | f0 | 8.5 | ||
Mass
| Mass bearing | 0.19 | kg |