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 |
TQIN
|
| Bore type |
Cylindrical
|
| d |
400 mm
|
Bore diameter (large diameter of tapered bore) |
|---|---|---|
| d |
400 mm
|
Bore diameter |
| D |
540 mm
|
Outside diameter |
| B |
339.96 mm
|
Total bearing width over inner rings |
| T |
295 mm
|
Total bearing width over outer rings |
| d1 |
≈ 455 mm
|
Abutment diameter shaft |
| D1 |
≈ 519 mm
|
Abutment diameter housing |
| r1,2 |
min. 3.3 mm
|
Inner ring radius (chamfer) |
| r3,4 |
min. 1.5 mm
|
Chamfer dimension outer ring |
| Basic dynamic load rating | C |
4 840 kN
|
|---|---|---|
| Basic static load rating | C0 |
12 500 kN
|
| Fatigue load limit | Pu |
980 kN
|
| Comparative radial load rating | CF |
1 270 kN
|
| Comparative axial load rating | CFa |
193 kN
|
| Thrust factor | K |
1.89
|
| Limiting value | e |
0.31
|
| Calculation factor | Y1 |
2.2
|
| Calculation factor | Y2 |
3.3
|
| Calculation factor | Y0 |
2.2
|
| Mass bearing |
213 kg
|
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