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 120 BTN9/P4CDB
BTM 120 BTN9/P4CDB
Dimensions
| d | 120 | mm | |
| D | 180 | mm | |
| H | 54 | mm | |
| d1 | 147.7 | mm | |
| D1 | 165 | mm | |
| r1,2 | min. | 2 | mm |
| r3,4 | min. | 1 | mm |
Abutment dimensions
| da | min. | 129 | mm |
| Da | max. | 175 | mm |
| ra | max. | 2 | mm |
| rb | max. | 1 | mm |
| dn | 144.1 | mm |
Calculation data
Notes
| Basic dynamic load rating | C | 69.5 | kN | |
| Basic static load rating | C0 | 166 | kN | |
| Fatigue load limit | Pu | 5.7 | kN | |
| Attainable speed for grease lubrication | 4600 | r/min | ||
| Attainable speed for oil-air lubrication | 5900 | r/min | ||
| Preload class A | 850 | N | ||
| Preload class B | 2550 | N | ||
| Static axial stiffnes for preload A | 649 | N/µm | ||
| Static axial stiffnes for preload B | 985 | N/µm | ||
| Reference grease quantity | Gref | 40 | 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 | 4.55 | kg |