NKX 25 Z
Combined needle roller / thrust ball bearing with a cover
These bearings consist of a radial needle roller bearing combined with a thrust ball bearing.
Together they can accommodate both radial loads and axial loads in one direction. In addition, they can operate at relatively high speeds. Their low cross-sectional height makes the bearings particularly suitable for applications where other types of locating bearing arrangements occupy too much space. The thrust part is capped with a cover that forms a gap-type seal to retain the grease in the bearings.
- Accommodate radial and axial loads in one direction
- High load carrying capacity
- Relatively high-speed capability
- Low cross section
- Non-separable design
Dimensions
| Fw |
25 mm
|
Diameter under rollers |
| D |
37 mm
|
Outside diameter |
| C |
30 mm
|
Width |
| C1 |
11 mm
|
Width of thrust part |
| C2 |
9.5 mm
|
Distance side face to lubrication hole |
| d |
25 mm
|
Bore diameter of thrust part |
| D2 |
43.2 mm
|
Diameter of stamped steel cover |
| r1,2 |
min.0.6 mm
|
Chamfer dimension |
Abutment dimensions
| da |
min.37.7 mm
|
Diameter of shaft abutment |
| ra |
max.0.6 mm
|
Radius of fillet |
| rb |
max.0.3 mm
|
Radius of fillet |
| di |
20 mm
|
Bore diameter of associated inner ring |
| F |
25 mm
|
Diameter of inner ring raceway |
| Bi |
20 mm
|
Width of associated inner ring |
Calculation data
| Basic dynamic load rating, radial |
C |
19 kN
|
| Basic static load rating, radial |
C0 |
32.5 kN
|
| Basic dynamic load rating, axial |
C |
19.5 kN
|
| Basic static load rating, axial |
C0 |
40.5 kN
|
| Fatigue load limit, radial |
Pu |
4 kN
|
| Fatigue load limit, axial |
Pu |
1.5 kN
|
| Minimum axial load factor |
A |
0.0085
|
| Reference speed |
|
6 300 r/min
|
| Limiting speed |
|
5 500 r/min
|
