71812 ACD/P4
Dimensions
|
| d | | 60 | mm |
| D | | 78 | mm |
| B | | 10 | mm |
| d1 | | 65.7 | mm |
| d2 | | 65.7 | mm |
| D1 | | 72.5 | mm |
| r1,2 | min. | 0.3 | mm |
| r3,4 | min. | 0.15 | mm |
| a | | 21.1 | mm |
Abutment
dimensions
|
|
| da | min. | 62 | mm |
| db | min. | 62 | mm |
| Da | max. | 76 | mm |
| Db | max. | 77.2 | mm |
| ra | max. | 0.3 | mm |
| rb | max. | 0.15 | mm |
| dn | | 66.4 | mm |
Calculation
data
Calculation factors
for eqivalent bearing loads
| Basic dynamic load rating | C | | 12.7 | kN |
| Basic static load rating | C0 | | 13.4 | kN |
| Fatigue load limit | Pu | | 0.57 | kN |
| Attainable speed for grease lubrication | | | 15000 | r/min |
| Attainable speed for oil-air lubrication | | | 22000 | mm/min |
| Ball diameter | Dw | | 5.556 | mm |
| Number of balls | z | | 28 | |
| Reference grease quantity | Gref | | 1.2 | cm³ |
| Calculation factor | e | | 0.68 | |
| Calculation factor (single, tandem) | Y2 | | 0.87 | |
| Calculation factor (single, tandem) | Y0 | | 0.38 | |
| Calculation factor (single, tandem) | X2 | | 0.41 | |
| Calculation factor (back-to-back, face-to-face) | Y1 | | 0.92 | |
| Calculation factor (back-to-back, face-to-face) | Y2 | | 1.41 | |
| Calculation factor (back-to-back, face-to-face) | Y0 | | 0.76 | |
| Calculation factor (back-to-back, face-to-face) | X2 | | 0.67 | |
| Preload
(back-to-back, face-to-face) |
| Preload class A | GA | | 114 | N |
| Preload class B | GB | | 340 | N |
| Preload class C | GC | | 680 | N |
| Calculation factor | f | | 1.3 | |
| Calculation factor | f1 | | 0.97 | |
| Calculation factor | f2A | | 1 | |
| Calculation factor | f2B | | 1.08 | |
| Calculation factor | f2C | | 1.15 | |
| Calculation factor | fHC | | 1 | |
| Static axial
stiffness |
| Preload class A | | | 141 | N/µm |
| Preload class B | | | 222 | N/µm |
| Preload class C | | | 306 | N/µm |
Mass
