Four-row tapered roller bearings are separable heavy-duty bearings capable of withstanding both high radial and axial loads simultaneously; they offer high load-carrying capacity and high support rigidity. Common configurations include TQO and TQIT, which are typically fitted with solid brass cages and are designed for forced circulation lubrication. They are widely used in the roll necks of metallurgical rolling mills, such as hot rolling mills and cold rolling mills, serving as the core support bearings for steel rolling equipment; they are also suitable for other heavy-duty rolling machinery.
| Bearing model number | Basic Dimensions（mm） | Basic load （KN） |
Bearing weight | |||
|---|---|---|---|---|---|---|
| d inner diameter |
D outer diameter |
B thickness |
dynamic load Cr |
static load Cor |
||
| 3806/1580 | 1580 | 1960 | 1080 | 45000 | 173000 | 7810 |
| 3806/1500 | 1500 | 1900 | 1080 | 45800 | 167000 | 7700 |
| 3806/1370 | 1370 | 1765 | 1050 | 42000 | 150000 | 6965 |
| 3806/1300 | 1300 | 1720 | 1040 | 42000 | 138000 | 7010 |
| 3806/1260 | 1260 | 1640 | 1000 | 38300 | 141000 | 5810 |
| 3806/1250 | 1250 | 1550 | 890 | 29700 | 112000 | 3823 |
| 3806/1080 | 1080 | 1450 | 950 | 32900 | 106000 | 4455 |
| 3806/1070 | 1070 | 1400 | 889.762 | 29700 | 99000 | 3735 |
| 3806/850 | 850 | 1360 | 910 | 34200 | 82600 | 5443 |
| 3806/780/HCC9 | 780 | 1220 | 840 | 23200 | 70500 | 3810 |
| 3806/780/HCC9 | 750 | 1220 | 840 | 21100 | 70500 | 3810 |
| 3811/750-RS/HCC9 | 750 | 1220 | 840 | 24600 | 64500 | 3880 |
| 3811/750 | 750 | 1220 | 840 | 17700 | 68500 | 3985 |
| 3806/750/HCEC9 | 750 | 950 | 410 | 9560 | 27780 | 703 |
| 331752 | 730 | 940 | 500 | 11900 | 35600 | 926 |
| 1-7029 | 711.2 | 914.4 | 390 | 6200 | 19400 | 674 |
| 3806/711X4-XRS | 711.2 | 914.4 | 390 | 7900 | 20100 | 674 |
| 1-7029 | 711 | 914.4 | 390 | 6200 | 19400 | 674 |
| 3806/710/HCYA2 | 710 | 900 | 410 | 5880 | 27500 | 650 |
| 3806/685.8-XRS/HCC9 | 685.8 | 876.3 | 352.425 | 5800 | 14500 | 490 |
