Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7052 CD/P4A
7052 CD/P4A
Dimensions
| d | 260 | mm | |
| D | 400 | mm | |
| B | 65 | mm | |
| d1 | 303.2 | mm | |
| d2 | 303.2 | mm | |
| D1 | 356.8 | mm | |
| r1,2 | min. | 4 | mm |
| r3,4 | min. | 1.5 | mm |
| a | 76.9 | mm |
Abutment dimensions
| da | min. | 275 | mm |
| db | min. | 275 | mm |
| Da | max. | 385 | mm |
| Db | max. | 393 | mm |
| ra | max. | 3 | mm |
| rb | max. | 1.5 | mm |
| dn | 315 | mm |
Calculation data
| Basic dynamic load rating | C | 416 | kN | |
| Basic static load rating | C0 | 630 | kN | |
| Fatigue load limit | Pu | 14.6 | kN | |
| Attainable speed for grease lubrication | 3400 | r/min | ||
| Attainable speed for oil-air lubrication | 5300 | r/min | ||
| Ball diameter | Dw | 44.45 | mm | |
| Number of balls | z | 21 | ||
| Reference grease quantity | Gref | 324 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 1550 | N | |
| Static axial stiffness, preload class A | 250 | N/µm | ||
| Preload class B | GB | 3100 | N | |
| Static axial stiffness, preload class B | 336 | N/µm | ||
| Preload class C | GC | 6200 | N | |
| Static axial stiffness, preload class C | 464 | N/µm | ||
| Preload class D | GD | 12400 | N | |
| Static axial stiffness, preload class D | 660 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.13 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.02 | ||
| Calculation factor | f2C | 1.05 | ||
| Calculation factor | f2D | 1.09 | ||
| Calculation factor | fHC | 1 | ||
| Calculation factor | f0 | 15.7 | ||
Mass
| Mass bearing | 25.6 | kg |