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 |
TQOSN/GWSI
|
| Bore type |
Cylindrical with helical groove
|
| d |
343.052 mm
|
Bore diameter |
|---|---|---|
| D |
457.098 mm
|
Outside diameter |
| B |
254 mm
|
Total bearing width over inner rings |
| T |
254 mm
|
Total bearing width over outer rings |
| d1 |
≈ 362 mm
|
Abutment diameter shaft |
| D1 |
≈ 420 mm
|
Abutment diameter housing |
| r1,2 |
min. 1 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 3.3 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
3 350 kN
|
|---|---|---|
| Basic static load rating | C0 |
6 400 kN
|
| Fatigue load limit | Pu |
540 kN
|
| Comparative radial load rating | CF |
815 kN
|
| Comparative axial load rating | CFa |
189 kN
|
| Thrust factor | K |
1.23
|
| Limiting value | e |
0.48
|
| Calculation factor | Y1 |
1.4
|
| Calculation factor | Y2 |
2.1
|
| Calculation factor | Y0 |
1.4
|
| Mass bearing |
110 kg
|
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