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.
| SKF performance class |
SKF Explorer
|
| Design variant/feature |
TQOS/GW
|
| Bore type |
Cylindrical with helical groove
|
| d |
220 mm
|
Bore diameter |
|---|---|---|
| D |
295 mm
|
Outside diameter |
| B |
315 mm
|
Total bearing width over inner rings |
| T |
315 mm
|
Total bearing width over outer rings |
| d1 |
≈ 232 mm
|
Abutment diameter shaft |
| D1 |
≈ 254 mm
|
Abutment diameter housing |
| r1,2 |
min. 0.6 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 2.5 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
1 993 kN
|
|---|---|---|
| Basic static load rating | C0 |
4 050 kN
|
| Fatigue load limit | Pu |
360 kN
|
| Comparative radial load rating | CF |
490 kN
|
| Comparative axial load rating | CFa |
93.3 kN
|
| Thrust factor | K |
1.5
|
| Limiting value | e |
0.4
|
| Calculation factor | Y1 |
1.7
|
| Calculation factor | Y2 |
2.5
|
| Calculation factor | Y0 |
1.6
|
| Mass bearing |
56.9 kg
|
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