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 |
571.5 mm
|
Bore diameter (large diameter of tapered bore) |
|---|---|---|
| D |
812.8 mm
|
Outside diameter |
| B |
593.725 mm
|
Total bearing width over inner rings |
| T |
593.725 mm
|
Total bearing width over outer rings |
| d1 |
≈ 622 mm
|
Abutment diameter shaft |
| D1 |
≈ 720 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 |
13 200 kN
|
|---|---|---|
| Basic static load rating | C0 |
36 000 kN
|
| Fatigue load limit | Pu |
2 400 kN
|
| Comparative radial load rating | CF |
3 550 kN
|
| Comparative axial load rating | CFa |
580 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 |
1 105 kg
|
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