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.
| Fw |
52 mm
|
Diameter under rollers |
|---|---|---|
| D |
68 mm
|
Outside diameter |
| C |
40 mm
|
Width |
| r1,2 |
min. 0.6 mm
|
Chamfer dimension outer ring |
| Da |
max. 64 mm
|
Abutment diameter housing (with flanges) |
|---|---|---|
| ra |
max. 0.6 mm
|
Fillet radius |
| Basic dynamic load rating | C |
70.4 kN
|
|---|---|---|
| Basic static load rating | C0 |
137 kN
|
| Fatigue load limit | Pu |
17 kN
|
| Reference speed |
7 500 r/min
|
|
| Limiting speed |
8 500 r/min
|
| Mass bearing |
0.34 kg
|
| 52x68x8 HMS5 RG | Radial shaft seal |
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