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. SKF 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 |
620 mm
|
Bore diameter |
|---|---|---|
| D |
800 mm
|
Outside diameter |
| B |
363.5 mm
|
Total bearing width over inner rings |
| T |
363.5 mm
|
Total bearing width over outer rings |
| d1 |
≈ 656 mm
|
Abutment diameter shaft |
| D1 |
≈ 732 mm
|
Abutment diameter housing |
| r1,2 |
min. 3 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 6 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
7 480 kN
|
|---|---|---|
| Basic static load rating | C0 |
21 600 kN
|
| Fatigue load limit | Pu |
1 530 kN
|
| Comparative radial load rating | CF |
1 960 kN
|
| Comparative axial load rating | CFa |
370 kN
|
| Thrust factor | K |
1.54
|
| Limiting value | e |
0.37
|
| Calculation factor | Y1 |
1.8
|
| Calculation factor | Y2 |
2.7
|
| Calculation factor | Y0 |
1.8
|
| Mass bearing |
465 kg
|
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