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 | TQON/GW |
| Bore type | Cylindrical with helical groove |
| d | 750 mm | Bore diameter |
|---|---|---|
| D | 950 mm | Outside diameter |
| B | 410 mm | Total bearing width over inner rings |
| T | 410 mm | Total bearing width over outer rings |
| d1 | ≈ 800 mm | Abutment diameter shaft |
| D1 | ≈ 878 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 | 10 800 kN |
| Basic static load rating | C0 | 26 500 kN |
| Fatigue load limit | Pu | 1 730 kN |
| Comparative radial load rating | CF | 2 650 kN |
| Comparative axial load rating | CFa | 475 kN |
| Thrust factor | K | 1.58 |
| Limiting value | e | 0.37 |
| Calculation factor | Y1 | 1.8 |
| Calculation factor | Y2 | 2.7 |
| Calculation factor | Y0 | 1.8 |
General bearing specifications
Bearing interfaces
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