331148 A
Four-row tapered roller bearingFour-row tapered roller bearings can accommodate combined heavy radial and axial loads at low to moderate speeds. They are used almost exclusively in work roll applications such as rolling mills. SKF manufactures four-row tapered roller bearings in TQO and TQI designs, in many variants and with different features.
- Very high radial load carrying capacity
- Accommodate axial loads in both directions
- Axial space-saving solution for roll necks
- Low friction
- Long service life
Description
| Design variant/feature | TQO/GWI |
| Bore type | Cylindrical with helical groove |
Dimensions
| d | 584.2 mm | Bore diameter |
|---|---|---|
| D | 762 mm | Outside diameter |
| B | 396.875 mm | Total bearing width over inner rings |
| T | 401.638 mm | Total bearing width over outer rings |
| d1 | ≈ 620 mm | Abutment diameter shaft |
| D1 | ≈ 688 mm | Abutment diameter housing |
| r1,2 | min. 3.3 mm | Chamfer dimension inner ring |
| r1,2 | min. 3.3 mm | Inner ring radius (chamfer) |
| r3,4 | min. 6.4 mm | Outer ring radius (chamfer) |
Calculation data
| Basic dynamic load rating | C | 7 650 kN |
|---|---|---|
| Basic static load rating | C0 | 22 400 kN |
| Fatigue load limit | Pu | 1 560 kN |
| Comparative radial load rating | CF | 2 040 kN |
| Comparative axial load rating | CFa | 472 kN |
| Thrust factor | K | 1.24 |
| Limiting value | e | 0.48 |
| Calculation factor | Y1 | 1.4 |
| Calculation factor | Y2 | 2.1 |
| Calculation factor | Y0 | 1.4 |
Mass
| Mass bearing | 485 kg |
Tolerances and clearances
Bearing data
- Tolerances: metric bearings (Normal and CL7C), inch bearings
- Internal clearance
Bearing interfaces
