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Four Row Tapered Roller Bearings

Four-row tapered roller bearings can accommodate combined (radial and axial) loads at low to moderate speeds. They are used almost exclusively in work roll applications such as rolling mills. You can get four-row tapered roller bearings in the TQO and TQI designs.

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Four Row Tapered Roller Bearings

Four-row tapered roller bearings are one kind of roll neck bearings. Their radial and axial loading capacity are high. They can carry axial loads in two directions, and their radial loading capacity is three times heavier than single-row tapered roller bearings, but the limiting speed is lower. They can be used as axial locating bearings in two directions because they can limit axial displacement in two directions within axial clearance. The radial and axial clearance also can be adjusted by changing the width of the spacer between the inner and outer rings. They are used almost exclusively in work roll applications such as rolling mills. You can get four-row tapered roller bearings in the TQO and TQI designs.

Product parameter

Dimensions(mm) Basic Load Ratings(kN) Bearing No. Mass(kg)
d D B r r1 Cr C0r
min min
140 210 185 2.5 2 1095 2740 382028 24.1
150 210 165 2.5 2 945 2560 382930 21.2
170 260 230 3 2.5 1655 4160 382034 39.5
200 310 275 3 2.5 2320 5880 382040 75.1
220 340 305 4 3 2770 7165 382044 98
240 360 310 4 3 2925 7870 382048 91
260 360 265 3 2.5 2415 7100 382952 76.3
260 400 345 5 4 3620 9565 382052 153
280 460 324 5 4 4150 9900 381156 200
300 420 300 4 3 3175 9305 382960 130
300 460 390 5 4 4615 12465 382060 219
300 500 370 5 4 5065 12175 381160 285
320 480 390 5 4 4760 13195 382064 234
340 460 310 4 3 3455 10780 382968 145
340 520 325 5 4 4565 11760 381068 234
340 580 425 5 4 6670 15980 381168 441
360 540 325 5 4 4690 12370 381072 248
380 560 325 5 4 4810 12985 381076 281
380 620 420 5 4 6980 17370 381176 487
400 600 356 5 4 5635 15060 381080 317
420 620 356 5 4 5770 15725 381084 358
420 700 480 6 5 8895 22110 381184 760
440 650 376 6 5 6335 17405 381088 401
460 620 310 4 3 4740 14570 381992 173
460 680 410 6 5 7115 19845 381092 476
480 650 338 5 4 5365 16600 381996 301
480 700 420 6 5 7400 21120 381096 547
500 720 420 6 5 7550 21910 3810/500 565
530 780 450 6 5 8835 25060 3810/530 744
530 870 590 7.5 6 13115 34105 3811/530 1422
560 750 368 5 4 6595 21015 3819/560 456
560 920 620 7.5 6 14475 37880 3811/560 1635
600 800 380 5 4 7205 23215 3819/600 536
600 870 480 5 5 10325 30115 3810/600 995
600 980 650 7.5 6 16035 42465 3811/600 1970
630 850 418 6 5 8405 26915 3819/630 720
630 920 515 7.5 6 11645 34005 3810/630 1158
630 1030 670 7.5 6 17325 45975 3811/630 2202
670 900 412 6 5 8790 28175 3819/670 959
670 1090 710 7.5 6 19215 51720 3811/670 2665
710 1030 555 7.5 6 13860 41215 3810/710 1568
710 1150 750 9.5 9.5 21195 57810 3811/710 3227
750 1090 605 7.5 6 15775 47485 3810/750 1874
750 1220 840 9.5 9.5 24715 68495 3811/750 3994
950 1360 880 7.5 6 26435 87060 3820/950 4087
1060 1500 1000 9.5 9.5 32090 109975 3820/1060 5896

TQO design bearings (face-to-face arrangement)

TQO design bearings have two pairs of tapered roller and cage assemblies. The two rows of rollers of each pair are arranged face-to-face. Because TQO is the most widely used four-row tapered roller bearing design, We manufacture this design in many variants.

  • Open or sealed.
  • With cylindrical or tapered bore.
  • With or without inner ring extension on both sides.
  • With or without a helical groove in the bore.

TQI design bearings (back-to-back arrangement)

TQI design bearings have two pairs of tapered roller and cage assemblies. The two rows of rollers of each pair are arranged back-to-back. These bearings provide relatively stiff bearing arrangements, which can accommodate tilting moments. TQI design bearings are also used for vertical rolls of universal mills. In those applications, the bearings are generally mounted with an interference fit on the roll neck by applying a bearing design with a tapered bore. In this case, a bearing with a cylindrical bore is required because the inner rings have a loose fit on their seat, and the outer rings are mounted with an interference fit in the chocks.

  • With cylindrical or tapered bore.
  • With or without inner ring extension on one side.

Features of four-row tapered roller bearings

  • Well-allocated loads on the four-row rollers.
  • Using high hardness bearing steels thus ensures better wear resistance and long work life.
  • High radial and axial load capacity in two directions.
  • Separable, faster, and convenient for mounting, dismounting, inspection, and maintenance.

Application of four-row tapered roller bearings

Four-row tapered roller bearings are used worldwide for rolling mill bearing arrangements where rolling speeds are slow to moderate. They are mainly used in the working roll necks of hot or cold rolling mills and roll necks of cogging mills. They usually clearance fit with roll necks to being mounted and dismounted conveniently.

Company Information

We are a professional bearing exporter in China, producing many bearings in different sizes and sizes. We can provide you with excellent service in a wide range of bearings with world-class quality, such as deep groove ball bearings, spherical roller bearings, spherical ball/roller bearings, and cylindrical roller bearings, tapered roller bearings, angular contact Ball bearings, etc. Bearings can also provide OEM services according to customer requirements. We adhere to strict global standards, which is why we can provide you with a wide range of bearings of world-class quality. We have always adhered to the principle of "integrity-based, quality first, customer foremost." We are ready to use our sincerity to serve every global customer for long-term and win-win cooperation.

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Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

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