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 |
TQI.2
|
| Bore type |
Cylindrical
|
| d |
482.6 mm
|
Bore diameter (large diameter of tapered bore) |
|---|---|---|
| d |
482.6 mm
|
Bore diameter |
| D |
647.7 mm
|
Outside diameter |
| B |
446.5 mm
|
Total bearing width over inner rings |
| T |
401.638 mm
|
Total bearing width over outer rings |
| d1 |
≈ 550 mm
|
Abutment diameter shaft |
| D1 |
≈ 623 mm
|
Abutment diameter housing |
| r1,2 |
min. 6.4 mm
|
Inner ring radius (chamfer) |
| r3,4 |
min. 1.5 mm
|
Chamfer dimension outer ring |
| Basic dynamic load rating | C |
7 210 kN
|
|---|---|---|
| Basic static load rating | C0 |
20 000 kN
|
| Fatigue load limit | Pu |
1 460 kN
|
| Comparative radial load rating | CF |
1 900 kN
|
| Comparative axial load rating | CFa |
307 kN
|
| Thrust factor | K |
1.76
|
| Limiting value | e |
0.33
|
| Calculation factor | Y1 |
2
|
| Calculation factor | Y2 |
3
|
| Calculation factor | Y0 |
2
|
| Mass bearing |
401 kg
|
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