Bearings, units and housings -- Super-precision bearings -- Double direction angular contact thrust ball bearings -- Angular contact thrust ball bearings, double direction, super-precision -- SKF BTM 75 BTN9/HCP4CDB
BTM 75 BTN9/HCP4CDB
Dimensions
| d | 75 | mm | |
| D | 115 | mm | |
| H | 36 | mm | |
| d1 | 93.55 | mm | |
| D1 | 105.2 | mm | |
| r1,2 | min. | 1.1 | mm |
| r3,4 | min. | 0.6 | mm |
Abutment dimensions
| da | min. | 81 | mm |
| Da | max. | 111 | mm |
| ra | max. | 1 | mm |
| rb | max. | 0.6 | mm |
| dn | 91.1 | mm |
Calculation data
Notes
| Basic dynamic load rating | C | 32.5 | kN | |
| Basic static load rating | C0 | 69.5 | kN | |
| Fatigue load limit | Pu | 2.9 | kN | |
| Attainable speed for grease lubrication | 9000 | r/min | ||
| Attainable speed for oil-air lubrication | 10700 | r/min | ||
| Preload class A | 350 | N | ||
| Preload class B | 1050 | N | ||
| Static axial stiffnes for preload A | 447 | N/µm | ||
| Static axial stiffnes for preload B | 670 | N/µm | ||
| Reference grease quantity | Gref | 11.8 | cm³ |
Speed values are applicable to bearings with light preload (suffix DBA). For bearings with a heavy preload (suffix DBB), attainable speeds are about 75% of the quoted values.
Mass
| Mass bearing | 1.2 | kg |