Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71828 CD/HCP4
71828 CD/HCP4
Dimensions
| d | 140 | mm | |
| D | 175 | mm | |
| B | 18 | mm | |
| d1 | 151.3 | mm | |
| d2 | 151.3 | mm | |
| D1 | 163.71 | mm | |
| r1,2 | min. | 1.1 | mm |
| r3,4 | min. | 0.6 | mm |
| a | 30.2 | mm |
Abutment dimensions
| da | min. | 146 | mm |
| db | min. | 146 | mm |
| Da | max. | 169 | mm |
| Db | max. | 171.8 | mm |
| ra | max. | 1 | mm |
| rb | max. | 0.6 | mm |
| dn | 153.2 | mm |
Calculation data
| Basic dynamic load rating | C | 44.9 | kN | |
| Basic static load rating | C0 | 62 | kN | |
| Fatigue load limit | Pu | 2.12 | kN | |
| Attainable speed for grease lubrication | 8000 | r/min | ||
| Attainable speed for oil-air lubrication | 12000 | r/min | ||
| Ball diameter | Dw | 10.319 | mm | |
| Number of balls | z | 35 | ||
| Reference grease quantity | Gref | 9.9 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 240 | N | |
| Static axial stiffness, preload class A | 145 | N/µm | ||
| Preload class B | GB | 720 | N | |
| Static axial stiffness, preload class B | 251 | N/µm | ||
| Preload class C | GC | 1440 | N | |
| Static axial stiffness, preload class C | 373 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.43 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.1 | ||
| Calculation factor | f2C | 1.18 | ||
| Calculation factor | fHC | 1.02 | ||
| Calculation factor | f0 | 17.3 | ||
Mass
| Mass bearing | 0.7 | kg |