Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71930 CD/HCP4A
S71930 CD/HCP4A
Dimensions
| d | 150 | mm | |
| D | 210 | mm | |
| B | 28 | mm | |
| d1 | 168.5 | mm | |
| d2 | 168.5 | mm | |
| D2 | 195.15 | mm | |
| r1,2 | min. | 2 | mm |
| r3,4 | min. | 1 | mm |
| a | 38.2 | mm |
Abutment dimensions
| da | min. | 159 | mm |
| da | max. | 167.7 | mm |
| db | min. | 159 | mm |
| db | max. | 167.7 | mm |
| Da | max. | 201 | mm |
| Db | max. | 205 | mm |
| ra | max. | 2 | mm |
| rb | max. | 1 | mm |
Calculation data
| Basic dynamic load rating | C | 114 | kN | |
| Basic static load rating | C0 | 132 | kN | |
| Fatigue load limit | Pu | 4.15 | kN | |
| Attainable speed for grease lubrication | 7500 | r/min | ||
| Ball diameter | Dw | 19.05 | mm | |
| Number of balls | z | 23 | ||
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 470 | N | |
| Static axial stiffness, preload class A | 158 | N/µm | ||
| Preload class B | GB | 940 | N | |
| Static axial stiffness, preload class B | 216 | N/µm | ||
| Preload class C | GC | 1880 | N | |
| Static axial stiffness, preload class C | 306 | N/µm | ||
| Preload class D | GD | 3760 | N | |
| Static axial stiffness, preload class D | 450 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.24 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.07 | ||
| Calculation factor | f2C | 1.12 | ||
| Calculation factor | f2D | 1.18 | ||
| Calculation factor | fHC | 1.04 | ||
| Calculation factor | f0 | 16.2 | ||
Mass
| Mass bearing | 2.1 | kg |