Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7018 CB/P4A
7018 CB/P4A
Dimensions
| d | 90 | mm | |
| D | 140 | mm | |
| B | 24 | mm | |
| d1 | 108.7 | mm | |
| d2 | 106.13 | mm | |
| D2 | 125 | mm | |
| r1,2 | min. | 1.5 | mm |
| r3,4 | min. | 1 | mm |
| a | 27.5 | mm |
Abutment dimensions
| da | min. | 97 | mm |
| db | min. | 97 | mm |
| Da | max. | 133 | mm |
| Db | max. | 135.4 | mm |
| ra | max. | 1.5 | mm |
| rb | max. | 1 | mm |
| dn | 110 | mm |
Calculation data
| Basic dynamic load rating | C | 37.7 | kN | |
| Basic static load rating | C0 | 43 | kN | |
| Fatigue load limit | Pu | 0.98 | kN | |
| Attainable speed for grease lubrication | 12000 | r/min | ||
| Attainable speed for oil-air lubrication | 19000 | r/min | ||
| Ball diameter | Dw | 10.319 | mm | |
| Number of balls | z | 25 | ||
| Reference grease quantity | Gref | 14.1 | cm³ | |
| Preload and stiffness (back-to-back, face-to-face) | ||||
| Preload class A | GA | 92 | N | |
| Static axial stiffness, preload class A | 54 | N/µm | ||
| Preload class B | GB | 185 | N | |
| Static axial stiffness, preload class B | 71 | N/µm | ||
| Preload class C | GC | 550 | N | |
| Static axial stiffness, preload class C | 112 | N/µm | ||
| Calculation factors | ||||
| Calculation factor | f | 1.07 | ||
| Calculation factor | f1 | 1 | ||
| Calculation factor | f2A | 1 | ||
| Calculation factor | f2B | 1.02 | ||
| Calculation factor | f2C | 1.05 | ||
| Calculation factor | fHC | 1 | ||
| Calculation factor | f0 | 9.7 | ||
Mass
| Mass bearing | 1.25 | kg |