71912 CD/P4A
Dimensions
|
| d | | 60 | mm |
| D | | 85 | mm |
| B | | 13 | mm |
| d1 | | 67.7 | mm |
| d2 | | 67.7 | mm |
| D1 | | 77.3 | mm |
| r1,2 | min. | 1 | mm |
| r3,4 | min. | 0.3 | mm |
| a | | 16.3 | mm |
Abutment dimensions
|
|
| da | min. | 64.6 | mm |
| db | min. | 64.6 | mm |
| Da | max. | 80.4 | mm |
| Db | max. | 83 | mm |
| ra | max. | 1 | mm |
| rb | max. | 0.3 | mm |
| dn | | 69.7 | mm |
Calculation data
Calculation factors for eqivalent bearing loads
| Basic dynamic load rating | C | | 19.9 | kN |
| Basic static load rating | C0 | | 15.3 | kN |
| Fatigue load limit | Pu | | 0.655 | kN |
| Attainable speed for grease lubrication | | | 15000 | r/min |
| Attainable speed for oil-air lubrication | | | 24000 | mm/min |
| Ball diameter | Dw | | 7.938 | mm |
| Number of balls | z | | 24 | |
| Reference grease quantity | Gref | | 2.7 | cm³ |
| Calculation factor | f0 | | 10.5 | |
| Preload (back-to-back, face-to-face) |
| Preload class A | GA | | 70 | N |
| Preload class B | GB | | 140 | N |
| Preload class C | GC | | 280 | N |
| Preload class D | GD | | 560 | N |
| Calculation factor | f | | 1.17 | |
| 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 | |
| Static axial stiffness |
| Preload class A | | | 50 | N/µm |
| Preload class B | | | 67 | N/µm |
| Preload class C | | | 92 | N/µm |
| Preload class D | | | 130 | N/µm |
Mass
