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 |
TQOT
|
| Bore type |
Tapered 1:12
|
| d |
384.175 mm
|
Bore diameter (large diameter of tapered bore) |
|---|---|---|
| D |
546.1 mm
|
Outside diameter |
| B |
400.05 mm
|
Total bearing width over inner rings |
| T |
400.05 mm
|
Total bearing width over outer rings |
| d1 |
≈ 418 mm
|
Abutment diameter shaft |
| D1 |
≈ 484 mm
|
Abutment diameter housing |
| r1,2 |
min. 3.3 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 3.3 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
6 440 kN
|
|---|---|---|
| Basic static load rating | C0 |
16 600 kN
|
| Fatigue load limit | Pu |
1 290 kN
|
| Comparative radial load rating | CF |
1 730 kN
|
| Comparative axial load rating | CFa |
278 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 |
340 kg
|
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