Double row full complement cylindrical roller bearings incorporate a maximum number of rollers and are therefore suitable for very heavy radial loads in combination with moderate speeds. Having three flanges on the inner ring and one flange on the outer ring, NNCF design bearings can accommodate limited axial displacement in one direction. A retaining ring in the outer ring holds the bearing together. The retaining ring should not be loaded axially during operation.
| d |
240 mm
|
Bore diameter |
|---|---|---|
| D |
300 mm
|
Outside diameter |
| B |
60 mm
|
Width |
| d1 |
≈ 261 mm
|
Shoulder diameter inner ring |
| D1 |
≈ 275 mm
|
Shoulder diameter outer ring |
| b1 |
30 mm
|
Width annular lubrication groove outer ring |
| K |
4 mm
|
Diameter lubrication hole (outer ring) |
| s |
max. 4 mm
|
Permissible axial displacement from the normal position of one bearing ring relative to the other |
| r1,2 |
min. 2 mm
|
Chamfer dimension (open bearings) |
| r3,4 |
min. 2 mm
|
Chamfer dimension |
| da |
min. 249 mm
|
Abutment diameter shaft |
|---|---|---|
| das |
254 mm
|
Abutment diameter shaft |
| Da |
max. 292 mm
|
Abutment diameter housing |
| ra |
max. 2 mm
|
Fillet radius |
| rb |
max. 2 mm
|
Fillet radius |
| Basic dynamic load rating | C |
539 kN
|
|---|---|---|
| Basic static load rating | C0 |
1 290 kN
|
| Fatigue load limit | Pu |
125 kN
|
| Reference speed |
900 r/min
|
|
| Limiting speed |
1 100 r/min
|
|
| Minimum load factor | kr |
0.2
|
| Mass bearing |
9.64 kg
|
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