330758 BG
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 | 304.902 mm | Bore diameter |
|---|---|---|
| D | 412.648 mm | Outside diameter |
| B | 266.7 mm | Total bearing width over inner rings |
| T | 266.7 mm | Total bearing width over outer rings |
| d1 | ≈ 326 mm | Abutment diameter shaft |
| D1 | ≈ 379 mm | Abutment diameter housing |
| r1,2 | min. 3.3 mm | Chamfer dimension inner ring |
| r3,4 | min. 3.3 mm | Outer ring radius (chamfer) |
Calculation data
| Basic dynamic load rating | C | 2 970 kN |
|---|---|---|
| Basic static load rating | C0 | 7 500 kN |
| Fatigue load limit | Pu | 640 kN |
| Comparative radial load rating | CF | 780 kN |
| Comparative axial load rating | CFa | 122 kN |
| Thrust factor | K | 1.83 |
| Limiting value | e | 0.31 |
| Calculation factor | Y1 | 2.2 |
| Calculation factor | Y2 | 3.3 |
| Calculation factor | Y0 | 2.2 |
Mass
| Mass bearing | 103 kg |
Tolerances and clearances
Bearing data
- Tolerances: metric bearings (Normal and CL7C), inch bearings
- Internal clearance
Bearing interfaces
