Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7216 CD/HCP4A
7216 CD/HCP4A
Dimensions
| d | 80 | mm | |
| D | 140 | mm | |
| B | 26 | mm | |
| d1 | 99.5 | mm | |
| d2 | 99.5 | mm | |
| D1 | 120.5 | mm | |
| r1,2 | min. | 2 | mm |
| r3,4 | min. | 1 | mm |
| a | 27.8 | mm |
Abutment dimensions
| da | min. | 91 | mm |
| db | min. | 91 | mm |
| Da | max. | 129 | mm |
| Db | max. | 134.4 | mm |
| ra | max. | 2 | mm |
| rb | max. | 1 | mm |
| dn | 103.4 | mm |
Calculation data
| Basic dynamic load rating | C | 85.2 | kN | |
| Basic static load rating | C0 | 75 | kN | |
| Fatigue load limit | Pu | 3.05 | kN | |
| Attainable speed for grease lubrication | 12000 | r/min | ||
| Attainable speed for oil-air lubrication | 18000 | r/min | ||
| Ball diameter | Dw | 17.462 | mm | |
| Number of balls | z | 17 | ||
| Reference grease quantity | Gref | 18.084 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 320 | N | |
| Static axial stiffness, preload class A | 106 | N/µm | ||
| Preload class B | GB | 640 | N | |
| Static axial stiffness, preload class B | 144 | N/µm | ||
| Preload class C | GC | 1280 | N | |
| Static axial stiffness, preload class C | 201 | N/µm | ||
| Preload class D | GD | 2560 | N | |
| Static axial stiffness, preload class D | 289 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.09 | ||
| 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 | 15.1 | ||
Mass
| Mass bearing | 1.24 | kg |