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Four-row tapered roller bearings are used successfully worldwide for rolling mill bearing arrangements where rolling speeds are slow to moderate. Because of their design they are able to take up those axial loads which occur in such applications in addition to radial loads and generally no separate thrust bearings are required in such arrangements. This means that the roll necks can be relatively short and the chocks at both sides of the roll can have the same design.


Designations old spec. boundary dimensions Basic load ratings Speed rating e Weight
　 　 mm KN rpm 　 kg
　 　 d D T B Cr Cor Grease Oil e 　
M244249DW/M244210-M244210CD 　 220.662 314.325 239.712 239.712 1760 4510 600 750 0.33 60.3
BT4B328209/HA1 LM451349DW/LM451310-LM451310D 266.7 355.6 228.6 230.188 1960 5460 500 630 0.36 62.4
M255449DW/M255410-M255410CD 　 288.925 406.4 298.45 298.45 3180 8270 430 530 0.34 103
511736A M257248DW/M257210-M257210D 304.902 412.648 266.7 266.7 2900 8040 430 500 0.32 104
77867E LM761649D/LM761610-LM761610D 343.052 457.098 254 254 2650 7160 360 450 0.47 110
HM262749D/HM262710-HM262710CD 　 346.075 488.95 358.775 358.775 4460 11500 340 430 0.34 210

Four-row taper roller bearings
Designations old spec. boundary dimensions
mm
d D T B
　 2077134* 170 260 230 230
　 2077140* 200 310 275 275
　 2077144 220 340 305 305
　 2077148* 240 360 310 310
　 77752 260 400 255 255
　 2077152 260 400 345 345
　 777752 260 440 300 300
381156 1077756* 280 460 324 324
TRB1152.60 　 300 424 310 310
382060 2077160* 300 460 390 390
381160 1077760* 300 500 370 370
　 2077164 320 480 380 380
　 E2077968 340 460 310 310
381068 77168* 340 520 325 325
　 77172* 360 540 325 325
　 77176* 380 560 325 325
381176/HC 1077776 380 620 420 420
　 77779 395 545 288.7 268.7
381080/HC 77180S 400 600 356 356
　 77184* 420 620 356 356
381184 1077784* 420 700 480 480
　 77788 440 650 355 355
　 77188* 440 650 376 376
381992/HC 1077992 460 620 310 310
　 77192* 460 680 410 410
3810/530/HC 771/530 530 780 450 450

Designations boundary dimensions Weight
mm kg
d D T B
573331* 241.478 349.148 228.6 228.6 75
573745* 234.95 327.025 196.85 196.85 52
802130* 228.6 311.15 200.025 200.025 42
802019.H122AG* 220.662 314.325 239.712 239.712 57
802017* 206.375 282.575 190.5 190.5 33
577254* 203.2 317.5 266.7 266.7 76
575937* 190.5 266.7 188.912 187.325 34
802050* 177.8 247.65 192.088 192.088 26.6
577692* 165.1 225.425 168.275 165.1 20
573415* 139.7 200.025 160.34 157.165 17
802082* 244.475 327.025 193.675 193.675 47
577255* 244.475 381 304.8 304.8 133
802066* 254 358.775 269.875 269.875 83
802011* 266.7 355.6 228.6 230.188 61
573688* 266.7 393.7 269.878 269.878 115
567712* 276.225 393.7 269.878 269.878 109
575940* 279.4 393.7 269.878 269.878 106
802101.A250.300* 285.75 380.898 244.475 244.475 74
802071.H122AG* 304.648 438.048 279.4 280.99 128
802025* 304.902 412.648 266.7 266.7 98
802072.H122AG* 305.003 438.048 279.4 280.99 128
802081.H122AE* 317.5 422.275 269.875 269.875 100
802068* 330.302 438.023 254 247.65 97
802003.H122AG* 343.052 457.098 254 254 108
802023* 355.6 482.6 269.875 265.112 137
579769* 368.3 523.875 382.588 382.588 255
802015* 385.762 514.35 317.5 317.5 175
802039* 406.4 546.1 288.925 288.925 180
802078* 409.575 546.1 334.962 334.962 209
802046M* 415.925 590.55 434.975 434.975 387
580091* 431.8 571.5 336.55 336.55 242
575857* 447.675 635 463.55 463.55 470
802044* 440 590 480 480 359
800917* 440 650 353.05 353.05 378
574663* 450 595 368 368 280
576497* 450 595 398 398 302
580269* 450 595 414 414 308
575213* 460 610 360 360 290
572067* 479.425 679.45 495.3 495.3 574
381096-2RS 480 700 420 420 440
579990* 482.6 615.95 330.2 330.2 230
572123* 489.026 634.873 320.675 320.675 250
577346* 501.65 711.2 520.7 520.7 632
575859* 514.35 673.1 422.275 422.275 398
574472* 519.113 736.6 536.575 536.575 732
802152* 540 690 400 400 356
575848* 558.8 736.6 322.263 322.263 371
565249* 　 736.6 409.575 409.575 460
575824* 585.788 771.525 479.425 479.425 605
572242* 595.313 844.55 615.95 615.95 1105
578717* 600 850 450 450 820
802043.H122AG* 609.6 787.4 361.95 361.95 425
573689* 609.6 813.562 479.425 479.425 695
580638* 635 901.7 654.05 654.05 1354
572660* 657.225 933.45 676.275 676.275 1530
575037* 679.45 901.7 552.45 552.45 970
802095* 710 900 410 410 570
3811/750-2RS 750 1220 840 840 3972