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 |
680 mm
|
Bore diameter (large diameter of tapered bore) |
|---|---|---|
| D |
930 mm
|
Outside diameter |
| B |
700 mm
|
Total bearing width over inner rings |
| T |
700 mm
|
Total bearing width over outer rings |
| d1 |
≈ 728 mm
|
Abutment diameter shaft |
| D1 |
≈ 833 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 |
18 300 kN
|
|---|---|---|
| Basic static load rating | C0 |
54 000 kN
|
| Fatigue load limit | Pu |
3 400 kN
|
| Comparative radial load rating | CF |
4 900 kN
|
| Comparative axial load rating | CFa |
757 kN
|
| Thrust factor | K |
1.85
|
| Limiting value | e |
0.31
|
| Calculation factor | Y1 |
2.2
|
| Calculation factor | Y2 |
3.3
|
| Calculation factor | Y0 |
2.2
|
| Mass bearing |
1 625 kg
|
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