Description
| Bore type | Cylindrical |
Dimensions
| d | 320 mm | Bore diameter |
|---|---|---|
| tΔdmp | -0.04 – 0.0 mm | Deviation limits of mid-range bore diameter |
| D | 580 mm | Outside diameter |
| tΔDmp | -0.05 – 0.0 mm | Deviation limits of mid-range outside diameter |
| B | 208 mm | Width |
| tΔBs | -0.4 – 0.0 mm | Deviation limits of ring width |
| d2 | ≈ 382 mm | Shoulder diameter of inner ring |
| D1 | ≈ 493 mm | Shoulder/recess diameter of outer ring |
| b | 22.3 mm | Width of lubrication groove |
| K | 12 mm | Diameter of lubrication hole |
| r1,2 | min. 5 mm | Chamfer dimension |
| Normal | ISO tolerance class for dimensions |
Abutment dimensions
| da | min. 340 mm | Diameter of shaft abutment |
|---|---|---|
| Da | max. 560 mm | Diameter of housing abutment |
| ra | max. 4 mm | Radius of fillet |
Calculation data
| NR performance class | NR Explorer | |
| Basic dynamic load rating | C | 4 607 kN |
| Basic static load rating | C0 | 6 700 kN |
| Fatigue load limit | Pu | 475 kN |
| Reference speed | 700 r/min | |
| Limiting speed | 950 r/min | |
| Limiting value | e | 0.35 |
| Calculation factor | Y1 | 1.9 |
| Calculation factor | Y2 | 2.9 |
| Calculation factor | Y0 | 1.8 |
Tolerances of run-out
| Range of section height at inner ring of assembled bearing | tKia | 60 µm |
|---|---|---|
| Range of section height at outer ring of assembled bearing | tKea | 100 µm |
| ISO tolerance class for geoal tolerances | Normal |
Radial internal clearance
| Minimum initial clearance | 200 µm |
| Maximum initial clearance | 310 µm |
Tolerances and clearances
General bearing specifications
- Tolerances: Normal, P6, P5,
tapered bore 1:12, tapered bore 1:30 - Radial internal clearance: cylindrical bore, tapered bore
Bearing interfaces
- Seat tolerances for standard conditions
- Tolerances and resultant fit
Spherical roller bearings can accommodate heavy loads in both directions. They are self-aligning and accommodate misalignment and shaft deflections, with virtually no increase in friction or temperature. The design includes features to facilitate relubrication. The bearings can be used in a modular system, including housings, sleeves and nuts.
- Accommodate misalignment
- High load carrying capacity
- Relubrication features
- Low friction and long service life
- Increased wear resistance
