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Double row cylindrical roller bearings
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Double row cylindrical roller bearings are separable bearings. All the bearing units can be separately. This makes it easier to mount and dismount.
Double row cylindrical roller bearings have two structures of cylindrical and tapered bore. They mainly have 2 types: NN designs and NNU designs. Type of NN design has inner ring with two ribs and outer ring without rib. Type NNU has outer ring with two ribs and inner ring without rib. When mounting bearings with tapered bore, it is possible to reach a certain radial internal clearance. These two types of bearings allow axial displacements between shaft and housing, and can be used as non-locating bearings.
Double row cylindrical roller bearings have high load-carrying ability and high stiffness. The bearings are especially used as main shaft bearings of machine tools.
They are mainly used in machine tools, rolling mill stands, plastic calenders, grinding mills and also large gearboxes.
Here you will find details of such kind of bearings.
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download: Double row cylindrical roller bearings
Boundary dimensions Basic load ratings Designations Mass mm kN Current Original kg d D B rmin Fw Ew Cr Cor 200 280 60 2.1 - 259 420 815 NN 3940 3282940 10.6 280 80 2.1 - 259 484 960 NN 4940K/W20 4182940Y 14.1 280 80 2.1 - 259 570 1220 NN 4940 4282940 15.3 280 80 2.1 225 - 570 1220 NNU 4940 4482940 15.3 310 82 2.1 - 282 655 1170 NN 3040 3282140 22.7 310 82 2.1 232 - 655 1170 NNU 3040 3482140 22.7 310 109 2.1 - 282 890 1730 NN 4040 4282140 30.4 220 300 60 2.1 - 279 440 895 NN 3944 3282944 11.4 300 80 2.1 - 279 600 1330 NN 4944 4282944 16.6 300 80 2.1 245 - 600 1330 NNU 4944 4482944 16.6 340 90 3 - 310 815 1480 NN 3044 3282144 29.6 340 90 3 254 - 815 1480 NNU 3044 3482144 30 340 118 3 - 310 1190 2400 NN 4044 4282144 39.8 370 120 4 - 331 1050 1810 NN 3144 3282744 51.9 370 120 4 263 - 1050 1810 NNU 3144 3482744 52.3 240 300 60 1.1 - 283 405 1030 NN 4848 4282848 9.77 300 60 1.1 259 - 358 930 NNU4848 - 9.9 320 60 2.1 - 300 460 975 NN 3948 3282948 12.2 320 80 2.1 - 300 625 1450 NN 4948 4282948 17.9 320 80 2.1 263 - 625 1450 NNU 4948 4482948 18 360 92 3 - 330 855 1600 NN 3048 3282148 32.7 360 92 3 274 - 855 1600 NNU 3048 3482148 32.7 360 118 3 - 330 1240 2600 NN 4048 4282148 39.3 360 118 3 274 - 1240 2600 NNU 4048 4482148 42.7 400 128 4 - 358 1170 2040 NN 3148 3282748 64.2 400 160 4 282 - 1880 3530 NNU 4148 4482748 85 Boundary dimensions Basic load ratings Designations Mass mm kN Current Original kg d D B rmin Fw Ew Cr Cor 260 360 75 2.1 - 335 670 1380 NN 3952 3282952 21.4 360 100 2.1 - 335 711 1540 NN 4952K 4182952 29.2 360 100 2.1 - 335 935 2100 NN 4952 4282952 28.3 360 100 2.1 292 - 935 2100 NNU 4952 4482952 31.1 400 104 4 - 364 969 1810 NN 3052K 3182152 47.1 400 104 4 - 364 969 1810 NN 3052 3282152 48.5 400 140 4 - 364 1550 3250 NN 4052 4282152 59.7 400 140 4 300 - 1550 3250 NNU 4052 4482152 65 440 144 4 - 393 1480 2660 NN 3152 3282752 89.1 440 180 4 306 - 2200 4000 NNU4152 4482752 113 280 350 69 1.1 - 329 445 1160 NN 4856 4282856 15.3 350 69 2 303 - 457 1200 NNU4856K - 15.5 380 75 2.1 - 355 695 1460 NN 3956 3282956 22.7 380 100 2.1 - 355 960 2230 NN 4956 4284956 32.9 380 100 2.1 312 - 960 2230 NNU 4956 4482956 33 420 106 4 - 384 1020 1950 NN 3056K 3182156 49.1 420 106 4 - 384 1020 1950 NN 3056 3282156 49.9 420 106 4 320 - 1080 2080 NNU3056 - 51.4 460 146 5 - 413 1520 2790 NN 3156 3282756 95.7 300 380 80 2.1 324 - 690 1760 NNU 4860 4482860 21.7 420 118 3 - 388 1230 2870 NN 4960 4282960 51.6 420 118 3 339 - 1230 2870 NNU 4960 4482960 51.9 460 118 4 - 418 1180 2250 NN 3060 3282160 71.7 460 118 4 - 418 1180 2250 NN 3060K 3182160 69.6 460 160 4 - 418 1920 4100 NN4060 - 97.6 500 160 5 - 448 1760 3150 NN 3160 3282760 125 500 160 5 358 - 1760 3150 NNU 3160 3482760 126 320 400 80 2.1 346 - 700 1840 NNU 4864 4482864 22.8 Boundary dimensions Basic load ratings Designations Mass mm kN Current Original kg d D B rmin Fw Ew Cr Cor 320 440 118 3 - 408 1260 3050 NN 4964 4282964 50.2 440 118 3 - 408 1260 3050 NN 4964K 4182964 52 440 118 3 359 - 1260 3050 NNU 4964 4482964 54.9 480 121 4 - 438 1350 2670 NN 3064 3282164 76.6 480 121 4 366 - 1350 2670 NNU 3064 3482164 76.9 480 160 4 367 - 1960 4300 NNU 4064 4482164 103 540 176 5 384 - 2090 3750 NNU 3164 3482764 154 340 460 90 3 - 428 905 2020 NN 3968 3282968 42.9 460 118 3 - 428 1040 2450 NN 4968K 4182968 53.8 460 118 3 - 428 1350 3400 NN 4968 4282968 52.1 460 118 3 379 - 1350 3400 NNU 4968 4482968 57.8 520 133 5 - 473 1560 3020 NN 3068K 3182168 101 520 133 5 - 473 1560 3020 NN 3068 3282168 104 520 133 5 387 - 1560 3020 NNU3068 3482168 104 520 180 5 385 - 2420 5350 NNU 4068 4482168 141 360 480 90 3 - 448 930 2130 NN 3972 3282972 44.9 480 118 3 399 - 1390 3550 NNU 4972 4482972 60.6 540 134 5 - 493 1630 3240 NN 3072 3282172 106 540 134 5 - 493 1630 3240 NN 3072K 3182172 106 540 134 5 413 - 1630 3240 NNU 3072 3482172 108 540 180 5 - 496 2530 5450 NN 4072 3282172 132 600 243 5 422 - 4000 8000 NNU4172 4482772 282 380 520 140 4 - 485 1880 4600 NN 4976 4282976 81.3 520 140 4 426 - 1880 4600 NNU 4976 4482976 88.8 560 135 5 - 513 1590 3240 NN 3076K 3182176 110 560 135 5 - 513 1590 3240 NN 3076 3282176 114 Boundary dimensions Basic load ratings Designations Mass mm kN Current Original kg d D B rmin Fw Ew Cr Cor 380 620 194 5 - 559 2620 4950 NN 3176 3282776 224 620 194 5 449 - 2620 4950 NNU 3176 3482776 228 400 500 100 2.1 430 - 905 2540 NNU 4880 4482880 45.7 540 106 4 - 504 1240 2400 NN 3980K 318980 71.3 600 148 5 - 549 1980 3660 NN 3080K 3182180 143 600 148 5 - 549 1980 3660 NN 3080 3282180 147 650 200 6 474 - 2770 5400 NNU 3180 3482780 262 420 560 106 4 - 522 1280 2900 NN 3984 3282984 71.2 560 140 4 - 525 2000 5150 NN 4984 4282984 87.9 560 140 4 466 - 2000 5015 NNU 4984 4482184 97.2 620 150 5 - 568 2130 4450 NN 3084 3282184 154 620 150 5 478 - 2130 4450 NNU 3084 3482184 155 620 200 5 - 571 3150 7100 NN 4084 4282184 189 620 200 5 469 - 3400 7850 NNU 4084 4482184 209 700 224 6 501 - 3550 6800 NNU 3184 3482784 347 440 540 100 2.1 470 - 950 2790 NNU 4888 4482888 49.5 650 157 6 - 596 2360 4900 NN 3088 3282188 177 650 157 6 500 - 2360 4900 NNU 3088 3482188 178 720 226 6 - 649 3500 6800 NN 3188 3282788 357 460 580 118 3 497 - 1200 3600 NNU4892 4482892 76 620 118 4 - 578 1610 3700 NN 3992 3282992 94.5 620 160 4 510 - 2400 6200 NNU 4992 4482992 140 680 163 6 - 624 2470 5070 NN 3092K 3182192 204 680 163 6 - 624 2470 5070 NN 3092 3282192 204 480 650 170 5 - 607 2690 7000 NN 4996 4282996 164 700 165 6 - 643 2600 5550 NN 3096 3282196 211 Boundary dimensions Basic load ratings Designations Mass mm kN Current Original kg d D B rmin Fw Ew Cr Cor 480 700 218 6 533 - 4300 8600 NNU4096 4482196 273 790 248 7.5 - 708 4050 8100 NN 3196 3282796 447 500 670 170 5 554 - 2720 7200 NNU 49/500 44829/500 171 720 167 6 - 664 2580 5600 NN 30/500 32821/500 205 720 167 6 563 - 2580 5600 NNU 30/500 34821/500 220 530 710 136 5 - 663 2040 4900 NN 39/530 32829/530 149 710 180 5 588 - 2900 7050 NNU 49/530 44829/530 202 780 185 6 - 715 3200 6900 NN 30/530 32821/530 296 560 750 140 5 - 705 2370 4860 NN 39/560 32829/530 188 750 190 5 623 - 3250 8700 NNU 49/560 44829/560 239 780 180 8 - 725 2400 6400 NN 6/560 2872/560 266 820 195 8 - 756 2460 6560 NN 30/560K 31821/560 341 820 258 6 - 745 4100 10600 NN 40/560 42821/560 472 820 258 6 626 - 5720 13100 NNU40/560 44821/560 420 920 280 7.5 650 - 6850 13700 NNU 31/560 34827/560 738 600 800 200 5 666 - 3850 10500 NNU 49/600 44829/600 284 800 200 5 - 755 3450 7180 NN 49/600K 41829/600 257 870 200 6 - 803 3420 7785 NN 30/600 32821/600 355 870 272 6 664 - 6138 14040 NNU 40/600 44821/600 530 980 375 7.5 699 - 8910 18990 NNU 41/600 44827/600 1100 630 780 150 4 676 - 2290 7000 NNU 48/630 44828/630 160 850 218 6 - 793 4200 11400 NN 49/630 42829/630 328 850 218 6 704 - 4000 10800 NNU 49/630 44829/630 356 920 212 7.5 - 845 3860 8820 NN 30/630 32821/630 430 920 290 7.5 699 - 6885 15750 NNU 40/630 44821/630 635 1030 400 7.5 734 - 9900 21600 NNU 41/630 44827/630 1330 670 900 230 6 - 838 4450 12330 NN 49/670 42829/670 419 Boundary dimensions Basic load ratings Designations Mass mm kN Current Original kg d D B rmin Fw Ew Cr Cor 670 900 230 6 738 - 4950 13100 NNU49/670 44829/670 430 980 230 7.5 - 901 4620 10260 NN 30/670K 31821/670 597 980 308 7.5 744 - 7578 17640 NNU 40/670 44821/670 765 1090 412 7.5 774 - 10890 22950 NNU 41/670 44827/670 1500 710 870 160 4 759 - 2640 8350 NNU 48/710 44828/710 203 950 243 6 782 - 4850 13770 NNU49/710 44829/710 480 1030 236 7.5 - 951 5148 11880 NN 30/710 32821/710 590 1030 315 7.5 784 - 8415 19440 NNU 40/710 44821/710 850 1150 438 9.5 820 - 12060 25650 NNU 41/710 44827/710 1790 750 920 170 5 - 879 3070 9180 NN 48/750 42828/750 240 1000 250 6 831 - 4950 14400 NNU 49/750 44829/750 540 1090 250 7.5 - 1007 6336 14400 NN 30/750 32821/750 705 1090 335 7.5 830 - 9180 21600 NNU 40/750 44821/750 925 1220 475 9.5 871 - 14490 31950 NNU 41/750 44827/750 2230 800 1060 258 6 884 - 5247 15300 NNU 49/800 44829/800 615 1150 258 7.5 - 1065 7029 16200 NN 30/800 32821/800 790 1150 345 7.5 885 - 9720 23400 NNU 40/800 44821/800 1140 1280 475 9.5 921 - 14850 32850 NNU 41/800 44827/800 2390 850 1030 180 5 905 - 3400 11400 NNU48/850 44828/850 310 1120 272 6 939 - 5346 16200 NNU 49/850 44829/850 715 1220 272 7.5 - 1130 7128 16740 NN 30/850 32821/850 940 1220 365 7.5 940 - 10530 25650 NNU 40/850 44821/850 1340 1360 500 6 976 - 19080 40500 NNU 41/850 44827/850 2900 900 1180 280 6 986 - 5940 18000 NNU 49/900 44829/900 805 1280 280 7.5 - 1185 7425 18000 NN 30/900 32821/900 1050 1280 375 7.5 990 - 11520 28350 NNU 40/900 44821/900 1500 1420 515 6 1032 - 19800 42750 NNU 41/900 44827/900 3180 Boundary dimensions Basic load ratings Designations Mass mm kN Current Original kg d D B rmin Fw Ew Cr Cor 950 1250 300 7.5 1046 - 6633 20160 NNU 49/950 44829/950 960 1360 300 7.5 - 1255 8217 20160 NN 30/950 32821/950 1300 1360 412 7.5 1050 - 12780 31950 NNU 40/950 44821/950 1900 950 1500 545 6 1092 - 22950 51300 NNU 41/950 44827/950 3830 1000 1320 315 7.5 1103 - 7722 23400 NNU 49/1000 44829/1000 1250 1320 315 7.5 - 1238 8580 25200 NN49/1000 42829/1000 1200 1420 308 7.5 - 1316 9090 22050 NN 30/1000 32821/1000 1400 1420 412 7.5 1101 - 13860 34200 NNU 40/1000 44821/1000 2000 1580 580 6 1154 - 24750 55800 NNU 41/1000 44827/1000 4270 1060 1400 335 7.5 1160 - 9450 27450 NNU 49/1060 44829/1060 1350 1500 325 9.5 - 1391 9900 24750 NN 30/1060 32821/1060 1650 1660 600 7.5 1214 - 27270 62550 NNU 41/1060 44827/1060 5070 1120 1460 335 7.5 1220 - 9450 28350 NNU 49/1120 44829/1120 1450 1750 630 7.5 1279 - 30240 68850 NNU 41/1120 44827/1120 5600 1180 1540 355 7.5 1285 - 10710 32400 NNU 49/1180 44829/1180 1650 1850 670 7.5 1350 - 33210 76500 NNU 41/1180 44827/1180 7200 1250 1950 710 7.5 1426 - 37620 88200 NNU 41/1250 44827/1250 8000 1320 1720 400 7.5 1440 - 12420 38250 NNU 49/1320 44829/1320 3100 1720 400 7.5 - 1620 13800 42500 NN49/1320 42829/1320 3060 2060 750 7.5 1507 - 41130 95400 NNU 41/1320 44827/1320 9400 1400 2180 775 9.5 1598 - 44550 104400 NNU 41/1400 44827/1400 10700 1500 2300 800 9.5 1709 - 47520 118800 NNU 41/1500 44827/1500 12300
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