Description
Dimensions
| Fw | 42 mm | Diameter under rollers |
|---|---|---|
| D | 55 mm | Outside diameter |
| C | 36 mm | Width |
| r1,2 | min. 0.6 mm | Chamfer dimension outer ring |
Abutment dimensions
| Da | max. 51 mm | Diameter of housing abutment |
|---|---|---|
| ra | max. 0.6 mm | Fillet radius |
Calculation data
| NR performance class | NR Explorer | |
| Basic dynamic load rating | C | 56 kN |
| Basic static load rating | C0 | 93 kN |
| Fatigue load limit | Pu | 11.8 kN |
| Reference speed | 9 500 r/min | |
| Limiting speed | 11 000 r/min |
Associated seals
| 42x55x7 HMS5 RG | Radial shaft seal |
Tolerances and clearances
General bearing specifications
- Tolerances: Normal, P6, P5, ISO - F6 (Fw)
- Radial internal clearance: table
Design considerations
- Housing tolerances: table
- Shaft tolerances: Operating clearance
Double row needle roller bearings without an inner ring consist of an outer ring with two needle roller and cage assemblies. They are an excellent choice for compact bearing arrangements in applications where hardened and ground raceways can be provided on the shaft. The outer ring includes flanges to guide the roller and cage assemblies and has features to facilitate relubrication. The roller and cage assemblies and the outer ring form a non-separable unit.
- High radial load carrying capacity
- High stiffness
- Low cross-sectional height
- Accommodate axial displacement in both directions
- Enable a larger shaft diameter and a more rigid bearing arrangement
