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Four-row tapered roller bearings:
380 000 Type: this type of roller bearings use two double raceway inner rings, one double raceway outer
ring and two single raceway inner rings。 A double raceway outer ring and two single raceway outer rings,
inner ring and outer rings—they all have spacer ring between them,
which is used for adjusting clearance.
This bearing can withstand higher radial loads and axial loads. However, it has low speed limits, mainly
used for heavy machinery, such as rolling mill machines.
Tapered roller bearings, roll neck and bearing seat inner hole clearance fit
According to the working characteristics of hot rolling mill and cold rolling mill, the recommendations of
bearing, roll neck and bearing seat inner hole clearance fit as following:
Bearing inner diameter and roll neck clearance fit: Recommend roller bearings inner diameter clearance fit
uses on roller neck, which can meet the roller bearing inner ring creeps along the neck circumferentially,
and also facilitates the installation and removal of rolls.
Bearing outer diameter and bearing seat inner hole clearance fit, it is related to the size of the bearing
outer diameter, when the bearing outer diameter D <500mm, the tolerance of bearing seat inner hole size is
recommended H7, when D> 500mm, the tolerance of bearing seat inner hole size is recommended G7.
Tapered Roller Bearing radial clearance choice:
As to the tapered roller bearings which carry the radial load (mainly) and axial joint load, the working
conditions are extremely bad. In work, the actual clearance is related to carrying load, speed, lubrication,
temperature rise, design structure and surface roughness etc. In the selection, it shall be based on the
rolling mill situation analysis and determine the appropriate clearance of its value.
Dimensions (mm) Basic load rating (KN) Weight (kg) Number d D T Dynamic Staitc 140 198 144 854 1990 13.4 380628-1 210 114 666 1330 13.6 382028X2 210 185 906 2030 23.8 382028 225 145 969 1810 20.6 382128X2 270 290 2410 4880 74.5 380628-2 145 195 130 722 1790 10.6 380629 150 210 155 964 2350 16 382930X2 212 155 964 2350 16.8 380630 225 120 788 1590 16.1 382030X2 250 170 1390 2680 31.8 382130X2 160 226 165 1020 2580 20.2 382932X1 240 130 870 1780 19.6 382032X2 265 173 1450 2760 35.7 380632 270 180 1450 2760 39.8 382132X2 165 270 240 1960 4500 54.3 380633 170 230 175 1090 2890 20.3 382934X2 240 175 1210 3000 24.2 380634 260 144 1050 2080 25.4 382034X2 260 230 1360 2580 39 382034 280 185 1650 3220 42.4 382134X2 180 250 185 1280 3400 27.5 382936 254 185 1380 3440 28.9 382936X1 260 160 1140 2550 26.7 380636 280 158 1360 2800 34.9 382036X2 300 280 2440 5440 78.8 382136X2 190 260 200 1390 3360 28.6 382938X2 268 196 1520 3880 33.7 380638-1 270 190 1520 3880 34.2 380638-2 290 160 1380 2760 35.6 382038X2 320 218 2190 4440 70.3 382138X2 200 280 206 1690 4310 37.6 382940X2 282 206 1680 2510 42.1 380640 310 174 1520 3300 46.6 382040X2 340 234 2450 5130 86.2 382140X2 205 320 205 1880 3570 53.8 380641 220 300 230 1750 5000 46.5 382944X2 310 226 1880 5100 51.5 380644-1 220 320 250 2170 5940 67.1 380644-2 330 260 2380 5880 74.7 380644-3 340 190 2250 4530 96.7 382044 340 305 2250 4530 96.7 382044 370 250 2650 5130 104.6 382144X2 225 320 230 1910 5000 58 380645 230 315 190 1600 4310 42.5 380646 240 320 250 1950 5940 54 382948X2 338 248 2410 6630 67.6 380648-1 350 230 2270 5630 71.1 380648-2 360 194 1960 4500 66 382048X2 400 266 2840 6130 125.3 382148X2 250 360 186 1870 4440 58.3 380650-1 365 270 2750 7700 94.9 380650-2 370 220 2100 5500 79.7 380650-3 381 320 3330 8880 128 380650-4 385 255 2870 6450 107 380650-5 260 360 265 2400 6400 80 382952 360 272 2667 7440 81 38285X2 368 268 2635 6940 86 382052X2-2 400 255 2800 6000 109 382052X2-1 400 320 3969 9940 142 382052X2-2 400 345 5625 13500 153 382052 440 300 3890 9340 162 382152X2 270 364 260 2371 7130 76 380654-1 410 222 3339 5500 98 380654-2 280 380 290 2809 8000 92 382956X2 395 288 3051 8320 108 380656 420 250 3062 7130 115 382056X2 460 324 6150 14500 202 381156 300 420 300 3380 8700 128 382960 420 310 3580 10200 130 382960X2 430 300 3910 10320 139 380660-1 460 360 4900 12380 213 382060X2 460 390 4850 12630 235 382060 470 310 4300 9820 194 380660-2 500 370 5480 12540 281 381160 500 380 5400 12000 296 381160X2 310 430 310 3800 10600 133 380662-1 310 455 222 2780 6380 115 380662-2 460 325 4460 11500 178 380662-3 320 440 335 3910 10900 144 382964X2 460 338 4580 13300 178 380664-1 460 380 4650 14800 215 380664-2 480 360 4850 12500 224 382064X2 480 390 4870 15300 231 382064 540 364 6330 14400 347 381164X2 340 460 254 2900 8000 116 382968X2 460 310 3720 10700 143 382968 480 350 4400 12600 195 380668 520 325 4350 11100 231 381068 580 392 6780 15260 248 381168X2 580 425 6350 16900 435 381168 355 490 316 4520 12200 115 380671 360 480 375 4400 13800 189 382972X2 520 370 5560 14600 253 380672 540 325 5040 16400 245 381072 540 360 5070 12500 2740 381272X2 600 540 9970 24900 620 381172X2 370 490 292 3800 11600 149 380674 380 520 400 5560 16100 240 380676 560 325 5200 12600 271 381076 560 360 5730 14000 294 381076X2 620 400 7880 18500 484 381176X2 620 420 7620 17300 512 381176 395 545 288.7 3670 9200 185 380679 400 540 280 4100 10900 173 380680-1 564 412 6060 17300 311 380680-2 590 304 5070 12500 283 380680-3 600 308 5670 13900 312 381080X2 600 356 3930 13500 313 381080 650 414 8590 20800 548 381180X2 416 574 480 7160 21400 361 3806/416 420 560 437 5950 18100 279 380684-1 592 432 6440 18400 358 380684-2 620 312 6000 15100 327 381084X2 420 620 356 5920 14500 353 381084 650 460 10300 25400 726 380684-3 700 460 10300 25400 726 381184X2 700 480 10960 22900 750 381184 760 500 11980 20000 1025 380684 430 570 336 5070 14900 230 380686 440 620 454 7500 21900 441 380688-1 635 470 9530 27300 502 380688-2 650 326 6170 15500 376 381088X2-1 650 355 6700 15200 380 381088X2-2 650 376 6920 16400 396 381088 720 465 10520 24800 761 381188X2 448 635 464 9200 27000 479 3806/448 450 580 450 5500 17900 278 380690-1 595 368 5560 17100 269 380690-2 460 586 266 3910 11600 166 380692-1 590 360 5400 17600 239 380692-2 610 360 5400 16900 292 380692-3 615 360 5290 16000 285 380692-4 620 310 4800 13100 270 381992 625 421 7220 22000 376 380692-5 650 474 7900 23000 489 380692-6 680 338 7160 18900 427 381092X2 680 410 8490 20800 470 381092 760 494 11800 29150 911 381192X2 475 660 450 7330 22400 457 380695 480 678 494 10600 31900 578 380696 700 342 7050 17900 447 381096X2 700 420 5900 19000 547 381096 790 510 11570 26900 1017 381196X2 490 625 385 5070 282 380698 500 670 515 8890 30770 511 3806/500-1 705 515 10270 33300 645 3806/500-2 710 425 8520 24400 523 3806/500-3 720 348 6880 18500 470 3810/500-1 720 400 8410 23400 533 3810/500-2 720 420 8930 23700 558 3810/500 729.8 440 9840 27800 631 3806/500-4 830 540 13230 33000 1194 3811/500X2 508 762 420 9050 23900 684 3806/508 520 735 535 10580 33400 721 3806/520 530 730 535 10580 33150 648 3806/530-1 750 480 10100 31150 685 3806/530-2 750 550 11100 35270 778 3806/530-3 780 385 8790 23400 636 3810/530X2-1 780 450 11400 27000 734 3810/530 780 570 12800 37500 944 3810/530X2-2 870 560 14400 36150 1342 3811/530X2 870 590 15060 38000 1404 3811/530 880 544 14100 33900 1336 3806/530-4 560 750 368 7100 19200 432 3819/560 805 590 14500 46300 1017 3810/560X3 820 405 9630 25800 732 3810/560X2 920 575 15450 38800 1540 3811/560X2 920 620 18200 38000 1635 3811/560 570 780 515 11200 37150 742 3806/570-1 810 590 13440 43800 985 3806/570-2 600 800 380 7100 22200 529 3819/600 855 620 14700 48100 1155 3806/600 870 415 9790 27200 831 3810/600X2 870 480 10800 30000 982 3810/600 980 615 17600 45600 1865 3811/600X2 980 650 18000 40000 1918 3811/600 625 815 480 10400 31700 647 3806/625 630 850 418 11200 33440 711 890 650 16970 53800 1293 3806/630 920 515 14960 38600 1143 3810/630X2 920 600 16500 48200 1342 3810/630X2 1030 645 20270 53160 2162 3811/630X2 1030 670 16100 58000 2172 3810/630 650 1030 560 14930 37000 1780 3806/650 660 1070 642 20930 53800 2310 3806/660 670 900 412 11300 32100 749 3819/670 950 700 19800 61900 1599 3806/670 980 475 13880 36500 1224 3810/670X2 1090 690 22700 58800 2566 3811/670X2 680 870 460 10690 37500 686 3806/680-1 680 1000 505 14300 39400 1362 3806/680-2 710 900 410 8920 30500 629 3806/710-1 1000 730 21400 69400 1826 3806/710-2 1030 490 14500 40600 1372 3810/710X2 1030 555 14700 41800 1548 3810/710 1150 710 24500 65000 2931 3811/710X2 1150 750 25000 56000 3185 3811/710 730 1035 755 22500 73200 2043 3806/730 750 1090 515 16200 45600 1619 3810/750X2 1090 605 17370 49500 1856 3810/750 1130 690 19000 51700 2516 3806/750 1220 750 27430 73800 3504 3811/750X2 1220 840 24600 67900 3809 3811/750 780 1220 840 28400 74000 3659 3806/780 785 1030 605 16800 59400 1372 3806/785-1 1040 560 15600 519.. 1303 3806/785-2 800 1120 820 26200 86300 2842 3806/800 840 1170 840 26300 86400 2840 3806/840 850 1360 900 38900 140600 5101 3811/850 950 1360 880 25500 81800 4034 3820 1060 1500 1000 32000 70400 5624 3820/1060
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