BSD 2047 CGA
Super-precision single direction angular contact thrust ball bearingThese super-precision ball bearings offer very high running accuracy and are well suited for screw drive applications. They are also beneficial in other applications, where safe radial and axial support is required, together with extremely precise axial guidance of the shaft. They provide a high degree of axial stiffness and can accommodate heavy axial loads in one direction, high speeds and rapid accelerations.
- Very high running accuracy
- High axial stiffness
- High axial load carrying capacity in one direction
- Universally matchable
- Well suited for screw drive applications
Description
Dimensions
| d | 20 mm | Bore diameter |
|---|---|---|
| D | 47 mm | Outside diameter |
| H | 15 mm | Height |
| d1 | 29.4 mm | Shoulder diameter |
| d2 | 34.5 mm | Shoulder diameter |
| D1 | 34.6 mm | Shoulder/recess diameter |
| D2 | 40.65 mm | Shoulder/recess diameter |
| r1,2 | min. 1 mm | Chamfer dimension |
| a | 40 mm | Distance to pressure point |
Abutment dimensions
| da | min. 27 mm | Diameter of shaft abutment |
|---|---|---|
| db | min. 27 mm | Diameter of shaft abutment |
| Da | max. 42.5 mm | Diameter of housing abutment |
| Db | max. 42.5 mm | Diameter of housing abutment |
| ra | max. 1 mm | Radius of housing fillet |
Calculation data
| Basic dynamic load rating | C | 22 kN |
|---|---|---|
| Basic static load rating | C0 | 49 kN |
| Fatigue load limit | Pu | 1.8 kN |
| Attainable speed for grease lubrication | 9 000 r/min | |
| Attainable speed for oil-air lubrication | 12 000 r/min | |
| Contact angle | α | 62 ° |
| Preload | 1 480 N | |
| Frictional moment | 0.05 N·m | |
| Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) | 680 N/µm | |
| Maximum axial load carrying capacity | Fa | max. 14.5 kN |
| Reference grease quantity | Gref | 1.4 cm³ |
Mass
| Mass bearing | 0.13 kg |
Tolerances and clearances
Product details
Principles of bearing selection and application
- Chamfer dimensions
- Speed dependent initial grease fill → Initial grease fill
