Description
| Design variant/feature | NNU.4/W33W |
Dimensions
| d | 440 mm | Bore diameter |
|---|---|---|
| D | 640 mm | Outside diameter |
| B | 230 mm | Overall bearing width |
| D1 | ≈ 578 mm | Shoulder diameter outer ring |
| F | 482 mm | Raceway diameter inner ring |
| b | 16.7 mm | Width of annular groove |
| K | 9 mm | Diameter lubrication hole |
| r1,2 | min. 6 mm | Chamfer dimension outer ring |
| r3,4 | min. 6 mm | Chamfer dimension inner ring |
| s | max. 5.5 mm | Permissible axial displacement from the normal position of one bearing ring relative to the other |
Abutment dimensions
| da | min. 466 mm | Abutment diameter spacer sleeve |
|---|---|---|
| da | max. 475 mm | Abutment diameter spacer sleeve |
| db | min. 487 mm | Abutment diameter shaft |
| Da | max. 614 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 | 4 570 kN |
|---|---|---|
| Basic static load rating | C0 | 9 800 kN |
| Fatigue load limit | Pu | 780 kN |
| Reference speed | 850 r/min | |
| Limiting speed | 1 000 r/min | |
| Calculation factor | kr | 0.33 |
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
