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 |
206.375 mm
|
Bore diameter |
|---|---|---|
| D |
282.575 mm
|
Outside diameter |
| B |
190.5 mm
|
Total bearing width over inner rings |
| T |
190.5 mm
|
Total bearing width over outer rings |
| d1 |
≈ 221 mm
|
Abutment diameter shaft |
| D1 |
≈ 248 mm
|
Abutment diameter housing |
| r1,2 |
min. 0.8 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 3.3 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
1 400 kN
|
|---|---|---|
| Basic static load rating | C0 |
3 350 kN
|
| Fatigue load limit | Pu |
305 kN
|
| Comparative radial load rating | CF |
340 kN
|
| Comparative axial load rating | CFa |
85.2 kN
|
| Thrust factor | K |
1.15
|
| Limiting value | e |
0.5
|
| Calculation factor | Y1 |
1.35
|
| Calculation factor | Y2 |
2
|
| Calculation factor | Y0 |
1.3
|
| Mass bearing |
35.8 kg
|
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