Description
| Design variant/feature | NNU/W33 |
Dimensions
| d | 530 mm | Bore diameter |
|---|---|---|
| D | 780 mm | Outside diameter |
| B | 225 mm | Overall bearing width |
| D1 | ≈ 711 mm | Shoulder diameter outer ring |
| F | 601 mm | Raceway diameter inner ring |
| b | 22.3 mm | Width of annular groove |
| K | 12 mm | Diameter lubrication hole |
| r1,2 | min. 6 mm | Chamfer dimension outer ring |
| r3,4 | min. 20 mm | Chamfer dimension inner ring |
| α | 20 ° | Chamfer angle inner ring |
| s | max. 11.2 mm | Permissible axial displacement from the normal position of one bearing ring relative to the other |
Abutment dimensions
| da | min. 554 mm | Abutment diameter spacer sleeve |
|---|---|---|
| da | max. 592 mm | Abutment diameter spacer sleeve |
| db | min. 606 mm | Abutment diameter shaft |
| Da | max. 754 mm | Abutment diameter spacer sleeve / housing |
| ra | max. 5 mm | Fillet radius |
| rb | max. 5 mm | Fillet radius |
Calculation data
| Basic dynamic load rating | C | 4 400 kN |
|---|---|---|
| Basic static load rating | C0 | 9 500 kN |
| Fatigue load limit | Pu | 695 kN |
| Reference speed | 530 r/min | |
| Limiting speed | 800 r/min | |
| Calculation factor | kr | 0.21 |
Tolerances and clearances
General bearing specifications
- Tolerances: Normal, P6, P5
- Radial internal clearance: cylindrical bore, tapered bore
Bearing interfaces
- Seat tolerances for standard conditions
- Tolerances and resultant fit
Double row cylindrical roller bearings are designed to accommodate high to very high radial loads in combination with medium to high speeds. The NR assortment includes many designs and variants, such as standard and full complement bearings and also greased and sealed bearings. Depending on the configuration of the outer and inner rings, the bearings are available in locating as well as non-locating designs.
- High to very high radial load carrying capacity
- Low friction
- Long service life
