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.1
|
| Bore type |
Tapered 1:12
|
| d |
872.769 mm
|
Bore diameter (large diameter of tapered bore) |
|---|---|---|
| D |
1 181.1 mm
|
Outside diameter |
| B |
714.375 mm
|
Total bearing width over inner rings |
| T |
628.65 mm
|
Total bearing width over outer rings |
| d1 |
≈ 998 mm
|
Abutment diameter shaft |
| D1 |
≈ 1 130 mm
|
Abutment diameter housing |
| r1,2 |
min. 9.7 mm
|
Inner ring radius (chamfer) |
| r3,4 |
min. 1.5 mm
|
Chamfer dimension outer ring |
| Basic dynamic load rating | C |
20 900 kN
|
|---|---|---|
| Basic static load rating | C0 |
57 000 kN
|
| Fatigue load limit | Pu |
3 550 kN
|
| Comparative radial load rating | CF |
5 600 kN
|
| Comparative axial load rating | CFa |
909 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 |
2 450 kg
|
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