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 | 490 mm | Bore diameter |
|---|---|---|
| D | 625 mm | Outside diameter |
| B | 385 mm | Total bearing width over inner rings |
| T | 385 mm | Total bearing width over outer rings |
| d1 | ≈ 514 mm | Abutment diameter shaft |
| D1 | ≈ 583 mm | Abutment diameter housing |
| r1,2 | min. 3 mm | Chamfer dimension inner ring |
| r3,4 | min. 4 mm | Outer ring radius (chamfer) |
| AKMI performance class | AKMI Explorer | |
| Basic dynamic load rating | C | 7 100 kN |
| Basic static load rating | C0 | 16 300 kN |
| Fatigue load limit | Pu | 1 220 kN |
| Comparative radial load rating | CF | 1 730 kN |
| Comparative axial load rating | CFa | 273 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 |
General bearing specifications
Bearing interfaces
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