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/GWI
|
| Bore type |
Cylindrical with helical groove
|
| d |
609.6 mm
|
Bore diameter |
|---|---|---|
| D |
813.562 mm
|
Outside diameter |
| B |
479.425 mm
|
Total bearing width over inner rings |
| T |
479.425 mm
|
Total bearing width over outer rings |
| d1 |
≈ 653 mm
|
Abutment diameter shaft |
| D1 |
≈ 738 mm
|
Abutment diameter housing |
| r1,2 |
min. 3.3 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 6.4 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
10 600 kN
|
|---|---|---|
| Basic static load rating | C0 |
30 500 kN
|
| Fatigue load limit | Pu |
2 080 kN
|
| Comparative radial load rating | CF |
2 800 kN
|
| Comparative axial load rating | CFa |
455 kN
|
| Thrust factor | K |
1.76
|
| Limiting value | e |
0.33
|
| Calculation factor | Y1 |
2
|
| Calculation factor | Y2 |
3
|
| Calculation factor | Y0 |
2
|
| Mass bearing |
715 kg
|
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