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/W |
| Bore type | Cylindrical |
| d | 240 mm | Bore diameter |
|---|---|---|
| D | 338 mm | Outside diameter |
| B | 248 mm | Total bearing width over inner rings |
| T | 248 mm | Total bearing width over outer rings |
| d1 | ≈ 258 mm | Abutment diameter shaft |
| D1 | ≈ 306 mm | Abutment diameter housing |
| r1,2 | min. 4 mm | Chamfer dimension inner ring |
| r3,4 | min. 3 mm | Outer ring radius (chamfer) |
| Basic dynamic load rating | C | 2 550 kN |
|---|---|---|
| Basic static load rating | C0 | 5 500 kN |
| Fatigue load limit | Pu | 500 kN |
| Comparative radial load rating | CF | 620 kN |
| Comparative axial load rating | CFa | 119 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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