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 |
TQOS/GWISI
|
| Bore type |
Cylindrical with helical groove
|
| d |
304.8 mm
|
Bore diameter |
|---|---|---|
| D |
501.65 mm
|
Outside diameter |
| B |
336.55 mm
|
Total bearing width over inner rings |
| T |
336.55 mm
|
Total bearing width over outer rings |
| d1 |
≈ 350 mm
|
Abutment diameter shaft |
| D1 |
≈ 442 mm
|
Abutment diameter housing |
| r1,2 |
min. 2 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 6.4 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
5 120 kN
|
|---|---|---|
| Basic static load rating | C0 |
9 300 kN
|
| Fatigue load limit | Pu |
780 kN
|
| Comparative radial load rating | CF |
1 250 kN
|
| Comparative axial load rating | CFa |
245 kN
|
| Thrust factor | K |
1.47
|
| Limiting value | e |
0.4
|
| Calculation factor | Y1 |
1.7
|
| Calculation factor | Y2 |
2.5
|
| Calculation factor | Y0 |
1.6
|
| Mass bearing |
254 kg
|
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