Double row needle roller bearings without an inner ring and without flanges 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. Bearings without flanges on the outer ring are separable, i.e. the outer ring and the needle roller and cage assemblies can be mounted separately. The outer ring includes features to facilitate relubrication.
| Fw |
60 mm
|
Diameter under rollers |
|---|---|---|
| D |
78 mm
|
Outside diameter |
| C |
40 mm
|
Width |
| E |
68 mm
|
Raceway diameter outer ring |
| r1,2 |
min. 1 mm
|
Chamfer dimension outer ring |
| da |
67.2 mm
|
Smallest permissible abutment diameter shaft, bearings without flanges |
|---|---|---|
| Da |
68.8 mm
|
Abutment diameter housing (without flanges) |
| Db |
60.8 mm
|
Smallest permissible abutment diameter housing, bearings without flanges |
| ra |
max. 1 mm
|
Fillet radius |
| Basic dynamic load rating | C |
72.1 kN
|
|---|---|---|
| Basic static load rating | C0 |
173 kN
|
| Fatigue load limit | Pu |
21.2 kN
|
| Reference speed |
6 700 r/min
|
|
| Limiting speed |
7 500 r/min
|
| Mass bearing |
0.44 kg
|
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