331165 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/WI |
| Bore type | Cylindrical |
Dimensions
| d | 558.8 mm | Bore diameter |
|---|---|---|
| D | 736.6 mm | Outside diameter |
| B | 322.265 mm | Total bearing width over inner rings |
| T | 322.268 mm | Total bearing width over outer rings |
| d1 | ≈ 604 mm | Abutment diameter shaft |
| D1 | ≈ 678 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 | 6 270 kN |
|---|---|---|
| Basic static load rating | C0 | 16 600 kN |
| Fatigue load limit | Pu | 1 220 kN |
| Comparative radial load rating | CF | 1 660 kN |
| Comparative axial load rating | CFa | 279 kN |
| Thrust factor | K | 1.7 |
| Limiting value | e | 0.35 |
| Calculation factor | Y1 | 1.9 |
| Calculation factor | Y2 | 2.9 |
| Calculation factor | Y0 | 1.8 |
Mass
| Mass bearing | 375 kg |
Tolerances and clearances
Bearing data
- Tolerances: metric bearings (Normal and CL7C), inch bearings
- Internal clearance
Bearing interfaces
