Four-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. AKMI manufactures four-row tapered roller bearings in TQO and TQI designs, in many variants and with different features.
| Design variant/feature | TQONP/GW |
| Bore type | Cylindrical with helical groove |
| d | 625 mm | Bore diameter |
|---|---|---|
| D | 815 mm | Outside diameter |
| B | 600 mm | Total bearing width over inner rings |
| T | 600 mm | Total bearing width over outer rings |
| d1 | ≈ 656 mm | Abutment diameter shaft |
| D1 | ≈ 756 mm | Abutment diameter housing |
| r1,2 | min. 3 mm | Chamfer dimension inner ring |
| r3,4 | min. 6 mm | Outer ring radius (chamfer) |
| AKMI performance class | AKMI Explorer | |
| Basic dynamic load rating | C | 13 200 kN |
| Basic static load rating | C0 | 31 000 kN |
| Fatigue load limit | Pu | 2 120 kN |
| Comparative radial load rating | CF | 3 250 kN |
| Comparative axial load rating | CFa | 534 kN |
| Thrust factor | K | 1.74 |
| Limiting value | e | 0.33 |
| Calculation factor | Y1 | 2 |
| Calculation factor | Y2 | 3 |
| Calculation factor | Y0 | 2 |
General bearing specifications
Bearing interfaces
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