Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7219 CD/HCP4A
7219 CD/HCP4A
Dimensions
| d | 95 | mm | |
| D | 170 | mm | |
| B | 32 | mm | |
| d1 | 118.1 | mm | |
| d2 | 118.1 | mm | |
| D1 | 146.9 | mm | |
| r1,2 | min. | 2.1 | mm |
| r3,4 | min. | 1.1 | mm |
| a | 33.9 | mm |
Abutment dimensions
| da | min. | 107 | mm |
| db | min. | 107 | mm |
| Da | max. | 158 | mm |
| Db | max. | 163 | mm |
| ra | max. | 2 | mm |
| rb | max. | 1 | mm |
| dn | 124.4 | mm |
Calculation data
| Basic dynamic load rating | C | 138 | kN | |
| Basic static load rating | C0 | 120 | kN | |
| Fatigue load limit | Pu | 4.4 | kN | |
| Attainable speed for grease lubrication | 9500 | r/min | ||
| Attainable speed for oil-air lubrication | 15000 | r/min | ||
| Ball diameter | Dw | 23.812 | mm | |
| Number of balls | z | 15 | ||
| Reference grease quantity | Gref | 34.314 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 520 | N | |
| Static axial stiffness, preload class A | 127 | N/µm | ||
| Preload class B | GB | 1040 | N | |
| Static axial stiffness, preload class B | 173 | N/µm | ||
| Preload class C | GC | 2080 | N | |
| Static axial stiffness, preload class C | 241 | N/µm | ||
| Preload class D | GD | 4160 | N | |
| Static axial stiffness, preload class D | 347 | 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 | 14.6 | ||
Mass
| Mass bearing | 2.2 | kg |