Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S7213 ACD/HCP4A
S7213 ACD/HCP4A
Dimensions
| d | 65 | mm | |
| D | 120 | mm | |
| B | 23 | mm | |
| d1 | 82.9 | mm | |
| d2 | 82.9 | mm | |
| D2 | 105.3 | mm | |
| r1,2 | min. | 1.5 | mm |
| r3,4 | min. | 0.6 | mm |
| a | 33.2 | mm |
Abutment dimensions
| da | min. | 74 | mm |
| da | max. | 82.1 | mm |
| db | min. | 74 | mm |
| db | max. | 82.1 | mm |
| Da | max. | 111 | mm |
| Db | max. | 115.8 | mm |
| ra | max. | 1.5 | mm |
| rb | max. | 0.6 | mm |
Calculation data
| Basic dynamic load rating | C | 63.7 | kN | |
| Basic static load rating | C0 | 51 | kN | |
| Fatigue load limit | Pu | 2.2 | kN | |
| Attainable speed for grease lubrication | 13000 | r/min | ||
| Ball diameter | Dw | 15.875 | mm | |
| Number of balls | z | 15 | ||
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 400 | N | |
| Static axial stiffness, preload class A | 209 | N/µm | ||
| Preload class B | GB | 800 | N | |
| Static axial stiffness, preload class B | 272 | N/µm | ||
| Preload class C | GC | 1600 | N | |
| Static axial stiffness, preload class C | 360 | N/µm | ||
| Preload class D | GD | 3200 | N | |
| Static axial stiffness, preload class D | 485 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.07 | ||
| Calculation factor | f1 | 0.99 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.01 | ||
| Calculation factor | f2C | 1.03 | ||
| Calculation factor | f2D | 1.06 | ||
| Calculation factor | fHC | 1.01 | ||
| 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 | ||
Mass
| Mass bearing | 0.88 | kg |