Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7222 CD/HCP4A
7222 CD/HCP4A
Dimensions
| d | 110 | mm | |
| D | 200 | mm | |
| B | 38 | mm | |
| d1 | 138.7 | mm | |
| d2 | 138.7 | mm | |
| D1 | 171.3 | mm | |
| r1,2 | min. | 2.1 | mm |
| r3,4 | min. | 1.1 | mm |
| a | 39.9 | mm |
Abutment dimensions
| da | min. | 122 | mm |
| db | min. | 122 | mm |
| Da | max. | 188 | mm |
| Db | max. | 193 | mm |
| ra | max. | 2 | mm |
| rb | max. | 1 | mm |
| dn | 145.9 | mm |
Calculation data
| Basic dynamic load rating | C | 178 | kN | |
| Basic static load rating | C0 | 166 | kN | |
| Fatigue load limit | Pu | 5.6 | kN | |
| Attainable speed for grease lubrication | 8500 | r/min | ||
| Attainable speed for oil-air lubrication | 13000 | r/min | ||
| Ball diameter | Dw | 26.988 | mm | |
| Number of balls | z | 16 | ||
| Reference grease quantity | Gref | 54.15 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 670 | N | |
| Static axial stiffness, preload class A | 150 | N/µm | ||
| Preload class B | GB | 1340 | N | |
| Static axial stiffness, preload class B | 203 | N/µm | ||
| Preload class C | GC | 2680 | N | |
| Static axial stiffness, preload class C | 282 | N/µm | ||
| Preload class D | GD | 5360 | N | |
| Static axial stiffness, preload class D | 404 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.08 | ||
| Calculation factor | f1 | 1 | ||
| 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 | f0 | 14.7 | ||
Mass
| Mass bearing | 3.86 | kg |