Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71964 CDMA/HCP4A
71964 CDMA/HCP4A
Dimensions
| d | 320 | mm | |
| D | 440 | mm | |
| B | 56 | mm | |
| d1 | 357 | mm | |
| d2 | 357 | mm | |
| D1 | 403 | mm | |
| r1,2 | min. | 3 | mm |
| r3,4 | min. | 1.1 | mm |
| a | 79.1 | mm |
Abutment dimensions
| da | min. | 333 | mm |
| db | min. | 333 | mm |
| Da | max. | 425 | mm |
| Db | max. | 434 | mm |
| ra | max. | 2.5 | mm |
| rb | max. | 1 | mm |
| dn | 367 | mm |
Calculation data
| Basic dynamic load rating | C | 377 | kN | |
| Basic static load rating | C0 | 620 | kN | |
| Fatigue load limit | Pu | 13.7 | kN | |
| Attainable speed for grease lubrication | 3600 | r/min | ||
| Attainable speed for oil-air lubrication | 5000 | r/min | ||
| Ball diameter | Dw | 38.1 | mm | |
| Number of balls | z | 27 | ||
| Reference grease quantity | Gref | 282 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 1400 | N | |
| Static axial stiffness, preload class A | 311 | N/µm | ||
| Preload class B | GB | 2800 | N | |
| Static axial stiffness, preload class B | 422 | N/µm | ||
| Preload class C | GC | 5600 | N | |
| Static axial stiffness, preload class C | 589 | N/µm | ||
| Preload class D | GD | 11200 | N | |
| Static axial stiffness, preload class D | 849 | 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 | 16.5 | ||
Mass
| Mass bearing | 20.5 | kg |