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 | 285.75 mm | Bore diameter |
|---|---|---|
| D | 380.898 mm | Outside diameter |
| B | 244.48 mm | Total bearing width over inner rings |
| T | 250 mm | Total bearing width over outer rings |
| d1 | ≈ 309 mm | Abutment diameter shaft |
| D1 | ≈ 349 mm | Abutment diameter housing |
| r1,2 | min. 1 mm | Chamfer dimension inner ring |
| r3,4 | min. 3.3 mm | Outer ring radius (chamfer) |
| AKMI performance class | AKMI Explorer | |
| Basic dynamic load rating | C | 2 450 kN |
| Basic static load rating | C0 | 4 800 kN |
| Fatigue load limit | Pu | 425 kN |
| Comparative radial load rating | CF | 600 kN |
| Comparative axial load rating | CFa | 113 kN |
| Thrust factor | K | 1.51 |
| Limiting value | e | 0.4 |
| Calculation factor | Y1 | 1.7 |
| Calculation factor | Y2 | 2.5 |
| Calculation factor | Y0 | 1.6 |
General bearing specifications
Bearing interfaces
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