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Cylindrical Roller Bearings

Cylindrical Roller Bearings

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  • Cylindrical Roller Bearings
  • Cylindrical Roller Bearings

Cylindrical roller bearings (CRBs) have a simple structure with their cylindrical rollers in linear contact with the raceways. They offer high load capacity under primarily radial loads. Low friction between the rollers and ring ribs makes these bearings suited for high speed rotation.

Single-row bearings are designated as NU, NJ, NUP, N, or NF, while double-row bearings are designated as NNU or NN, depending on if side ribs are used. All types allow the inner and outer rings to be separated.

Some CRBs used as free-end bearings have no ribs so that the rings can move axially relative to each other. When the inner or outer ring has ribs on both sides and the other ring has a rib on one side, these bearings can take some axial load in one direction.

Double-row cylindrical roller bearings have high radial rigidity and are used primarily for the main shafts of precision machine tools. Cages are typically made of pressed steel or machined brass, but molded polyamide resin cages are used for some models.

SRF offers a wide variety of CRBs to suit your needs:

Cylindrical Roller Bearing Types

NU, N, NNU, NN: Suitable as free-end bearings.

NJ, NF: Can sustain limited axial loads in one direction.

NH, NUP: Suitable as fixed-end bearings. NH types are comprised of a NJ-type CRB with a HJ-type L-shaped thrust collar.


selectInquiryBearing NO. Boundary dimensions(mm) Basic load ratings(kN) Limiting speed(rpm) Abutment and fillet dimensions(mm) Weight (kg)
NewOlddDBr 1.2minr3、4minFwEwCrCorGreaseOilda mindb minDa maxDb maxra maxrb maxRefer
NU3884M 420 520 75 2.1 2.1 447 800 1990 900 1100 440 498 2 2 35.4
NU1984M 1032984 420 560 65 4 4 458 830 1660 900 1100 445 533 3 3 45
NJ1984M 1042984 420 560 65 4 4 458 830 1660 900 1100 445 533 3 3 47.4
NU2984M 2032984 420 560 82 4 4 458 522 1080 2320 900 1100 445 533 3 3 58.2
NU1084 32184 420 620 90 5 5 470 570 1390 2380 900 1100 449 588 4 4 91.7
NU3084 3032184 420 620 150 5 5 478 568 2190 4600 750 900 449 588 4 4 158
NU2284 32584 420 760 195 7.5 7.5 515 4400 8200 750 900 462 713 6 6 406
NU2988 2032988 440 600 95 4 4 484 1300 2760 900 1100 466 572 3 3 79.9
NU1088 32188 440 650 94 6 6 493 1470 2530 850 1000 476 611 5 5 105
NU3188 3032788 440 720 226 6 6 508 4750 9800 700 850 480 700 5 5 374
NU2288 32588 440 790 200 7.5 7.5 530 4850 8650 700 850 482 742 6 6 446
NU1992 1032992 460 620 74 4 4 500 1170 2260 800 950 486 591 3 3 63.2
NU2992 2032992 460 620 95 4 4 502 1650 2930 800 950 486 591 3 3 83.1
NUP2992 2092992 460 620 95 4 4 502 1650 2930 800 950 486 591 3 3 85
NU1092 32192 460 680 100 6 6 516 1580 2740 800 950 496 640 5 5 123
NU3092 3032192 460 680 163 6 6 523 2570 5400 600 750 496 640 5 5 207
NU3192 3032792 460 760 240 7.5 7.5 531 4950 10400 400 480 506 730 6 6 467
NU2292 32592 460 830 212 7.5 7.5 560 4500 7900 400 480 502 782 6 6 521
NU1996 1032996 480 650 78 5 5 525 1200 2390 400 480 510 617 4 4 75
NU2996 2032996 480 650 100 5 5 525 1600 3450 400 480 510 617 4 4 98.5
NU1096 32196 480 700 100 6 6 536 1620 2860 400 480 517 660 5 5 125
NU3096 3032196 480 700 165 6 6 543 2620 5600 400 480 517 660 5 5 217
NU19/500 10329/500 500 670 78 5 5 544 1190 2120 750 900 529 648 4 4 79
NU29/500 20329/500 500 670 100 5 5 543 1870 4300 750 900 529 648 4 4 101
N39/500E 30029/500 500 670 128 5 5 543 2060 4960 700 850 529 648 4 4 135
NU10/500 321/500 500 720 100 6 6 556 1660 2970 670 800 537 680 5 5 131
NU20/500 20321/500 500 720 128 6 6 553 2720 5600 630 750 537 680 5 5 180
NU30/500 30321/500 500 720 167 6 6 554 3500 7650 600 700 537 680 5 5 232
NU31/500E 30327/500 500 830 264 7.5 7.5 576 6200 1100 500 600 537 680 5 5 595
NU12/500 500 920 185 7.5 7.5 604 5180 8450 560 670 533 887 6 6 585
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