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 |
TQIT
|
| Bore type |
Tapered 1:12
|
| d |
391.071 mm
|
Bore diameter (large diameter of tapered bore) |
|---|---|---|
| D |
550 mm
|
Outside diameter |
| B |
428.625 mm
|
Total bearing width over inner rings |
| T |
384.175 mm
|
Total bearing width over outer rings |
| d1 |
≈ 455 mm
|
Abutment diameter shaft |
| D1 |
≈ 520 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 |
6 440 kN
|
|---|---|---|
| Basic static load rating | C0 |
16 600 kN
|
| Fatigue load limit | Pu |
1 290 kN
|
| Comparative radial load rating | CF |
1 730 kN
|
| Comparative axial load rating | CFa |
278 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 |
345 kg
|
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