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 | TQO/WI |
| Bore type | Cylindrical |
| d | 558.8 mm | Bore diameter |
|---|---|---|
| D | 736.6 mm | Outside diameter |
| B | 322.262 mm | Total bearing width over inner rings |
| T | 322.262 mm | Total bearing width over outer rings |
| d1 | ≈ 604 mm | Abutment diameter shaft |
| D1 | ≈ 678 mm | Abutment diameter housing |
| r1,2 | min. 3.2 mm | Chamfer dimension inner ring |
| r3,4 | min. 1.5 mm | Outer ring radius (chamfer) |
| Basic dynamic load rating | C | 6 270 kN |
|---|---|---|
| Basic static load rating | C0 | 16 600 kN |
| Fatigue load limit | Pu | 1 220 kN |
| Comparative radial load rating | CF | 1 660 kN |
| Comparative axial load rating | CFa | 279 kN |
| Thrust factor | K | 1.7 |
| Limiting value | e | 0.35 |
| Calculation factor | Y1 | 1.9 |
| Calculation factor | Y2 | 2.9 |
| Calculation factor | Y0 | 1.8 |
General bearing specifications
Bearing interfaces
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