331978 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 | TQON/GW |
| Bore type | Cylindrical with helical groove |
Dimensions
| d | 540 mm | Bore diameter |
|---|---|---|
| D | 690 mm | Outside diameter |
| B | 400 mm | Total bearing width over inner rings |
| T | 400 mm | Total bearing width over outer rings |
| d1 | ≈ 566 mm | Abutment diameter shaft |
| D1 | ≈ 643 mm | Abutment diameter housing |
| r1,2 | min. 2 mm | Chamfer dimension inner ring |
| r1,2 | min. 2 mm | Inner ring radius (chamfer) |
| r3,4 | min. 5 mm | Outer ring radius (chamfer) |
Calculation data
| Basic dynamic load rating | C | 7 480 kN |
|---|---|---|
| Basic static load rating | C0 | 21 200 kN |
| Fatigue load limit | Pu | 1 500 kN |
| Comparative radial load rating | CF | 1 860 kN |
| Comparative axial load rating | CFa | 301 kN |
| Thrust factor | K | 1.76 |
| Limiting value | e | 0.33 |
| Calculation factor | Y1 | 2 |
| Calculation factor | Y2 | 3 |
| Calculation factor | Y0 | 2 |
Mass
| Mass bearing | 372 kg |
Tolerances and clearances
Bearing data
- Tolerances: metric bearings (Normal and CL7C), inch bearings
- Internal clearance
Bearing interfaces
