BTW 50 CTN9/SP
Super-precision, basic design double direction angular contact thrust ball bearing
These double direction angular contact thrust ball bearings consist of two single row angular contact thrust ball bearings, arranged back-to-back.
They accommodate high axial loads in both directions and provide a high degree of system rigidity.
- Accommodate axial loads in both directions
- Maximum system rigidity
- Separable
Dimensions
| d |
50 mm
|
Bore diameter |
| D |
80 mm
|
Outside diameter |
| H |
38 mm
|
Height |
| d1 |
67.5 mm
|
Shoulder diameter shaft washer (high shoulder) |
| D1 |
74.9 mm
|
Shoulder diameter housing washer (low shoulder) |
| 2C |
19 mm
|
Height of both housing washers |
| r1,2 |
min.1 mm
|
Shaft washer chamfer radius |
| r3,4 |
min.0.3 mm
|
Housing washer small chamfer radius |
Abutment dimensions
| da |
min.61 mm
|
Abutment diameter shaft |
| Da |
min.74.9 mm
|
Abutment diameter shaft |
| Da |
max.76 mm
|
Abutment diameter housing |
| ra |
max.1 mm
|
Fillet radius |
| rb |
max.0.3 mm
|
Fillet radius |
Calculation data
| Basic dynamic load rating |
C |
22.5 kN
|
| Basic static load rating |
C0 |
60 kN
|
| Fatigue load limit |
Pu |
2.85 kN
|
| Attainable speed for grease lubrication |
|
9 000 r/min
|
| Attainable speed for oil-air lubrication |
|
11 000 r/min
|
| Contact angle |
α |
60 °
|
| Ball diameter |
Dw |
6.35 mm
|
| Number of rolling element rows |
i |
2
|
| Number of balls (per bearing) |
z |
25
|
| Reference grease quantity |
Gref |
3.3 cm³
|
| Preload |
|
415 N
|
| Static axial stiffness |
|
559 N/µm
|
Preload and stiffness
| Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) |
|
559 N/µm
|
