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 |
244.475 mm
|
Bore diameter |
|---|---|---|
| D |
327.025 mm
|
Outside diameter |
| B |
193.675 mm
|
Total bearing width over inner rings |
| T |
193.675 mm
|
Total bearing width over outer rings |
| d1 |
≈ 260 mm
|
Abutment diameter shaft |
| D1 |
≈ 305 mm
|
Abutment diameter housing |
| r1,2 |
min. 1.5 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 3.3 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
1 830 kN
|
|---|---|---|
| Basic static load rating | C0 |
4 300 kN
|
| Fatigue load limit | Pu |
390 kN
|
| Comparative radial load rating | CF |
475 kN
|
| Comparative axial load rating | CFa |
75.3 kN
|
| Thrust factor | K |
1.82
|
| Limiting value | e |
0.33
|
| Calculation factor | Y1 |
2
|
| Calculation factor | Y2 |
3
|
| Calculation factor | Y0 |
2
|
| Mass bearing |
46 kg
|
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