Description
Dimensions
| d | 300 mm | Bore diameter |
|---|---|---|
| D | 420 mm | Outside diameter |
| B | 118 mm | Width |
| d1 | ≈ 341 mm | Shoulder diameter inner ring |
| D1 | ≈ 374 mm | Shoulder diameter outer ring |
| b1 | 9.4 mm | Width annular lubrication groove outer ring |
| K | 5 mm | Diameter lubrication hole (outer ring) |
| r1,2 | min. 3 mm | Chamfer dimension (open bearings) |
Abutment dimensions
| da | min. 315 mm | Abutment diameter shaft |
|---|---|---|
| das | 328 mm | Abutment diameter shaft |
| Da | max. 406 mm | Abutment diameter housing |
| ra | max. 2.5 mm | Fillet radius |
Calculation data
| Basic dynamic load rating | C | 1 680 kN |
|---|---|---|
| Basic static load rating | C0 | 3 750 kN |
| Fatigue load limit | Pu | 355 kN |
| Reference speed | 670 r/min | |
| Limiting speed | 800 r/min | |
| Minimum load factor | kr | 0.25 |
Tolerances and clearances
General bearing specifications
- Tolerances: Normal
- Radial internal clearance: table
- Axial internal clearance
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
