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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
NU3164M 3032764 320 540 176 5 5 374 2740 4700 800 1200 347 509 4 4 170
NU264M 32264 320 580 92 5 5 390 1540 2270 900 1200 347 548 4 4 112
NU2264M 32564 320 580 150 5 5 390 2260 3700 900 1200 347 548 4 4 181
NU2868M 340 420 48 2.1 1.5 362 435 1010 1200 1500 355 400 2 1.5 14.9
NU3868M 340 420 60 2.1 2.1 362 515 1250 1200 1500 359 400 2 2 18.6
NU1968M 1032968 340 460 56 3 3 372 600 1120 1100 1400 361 438 2.5 2.5 27.1
NU2968M 2032968 340 460 72 3 3 370 780 1570 1100 1400 361 438 2.5 2.5 33.7
NU1068M 32168 340 520 82 5 5 385 1080 1740 1000 1300 368 490 4 4 61.8
NU3168M 3032768 340 580 190 5 5 399 3500 6250 700 1000 368 548 4 4 214
NU268M 32268 340 620 92 6 6 420 1590 2410 900 1200 374 582 5 5 128
NU1972M 1032972 360 480 56 3 3 392 605 1160 1200 1500 381 457 2.5 2.5 28.8
NU2972M 2032972 360 480 72 3 3 392 790 1630 1000 1300 381 457 2.5 2.5 36.7
NU1072M 32172 360 540 82 5 5 405 1110 1830 900 1100 388 509 4 4 64.1
NU272M 32272 360 650 95 6 6 445 1650 2560 900 1100 394 611 5 5 144
NU2272M 32572 360 650 170 6 6 435 3500 6050 800 100 394 611 5 5 258
NU2372M 32672 360 750 224 7.5 7.5 455 4950 8700 700 850 420 690 7 7 480
NUP2876Q1 2092876Q 380 480 60 2.1 2.1 406 550 680 950 1200 396 460 2 2 27
NU1976M 1032976 380 520 65 4 4 418 775 1470 950 1200 404 493 3 3 41.2
NU1076M 32176 380 560 82 5 5 425 1140 1910 950 1200 408 529 4 4 67.5
NU3076M 3032176 380 560 135 5 5 433 1740 3600 850 1000 408 529 4 4 117
NU3176M 3032776 380 620 194 5 5 440 3350 6400 850 1000 408 588 4 4 238
NU276M 32276 380 680 95 6 6 470 1700 2700 850 1000 415 640 5 5 158
NU2276M 32576 380 680 175 6 6 460 3100 5250 750 900 415 640 5 5 290
NU3880M 400 500 75 2.1 2.1 427 785 1900 1000 1200 420 479 2 2 34.2
NU1980M 1032980 400 540 65 4 4 438 502 785 1520 1000 1200 425 513 3 3 43
NU2980M 2032980 400 540 82 4 4 438 502 1060 2250 900 1100 425 513 3 3 54.9
NU1080M 32180 400 600 90 5 5 450 550 1360 2280 900 1100 429 568 4 4 88.2
NJ1080M 42180 400 600 90 5 5 450 550 1360 2280 900 1100 429 568 4 4 90.6
NU3080M 3032180 400 600 148 5 5 458 548 2150 4450 800 950 429 568 4 4 150
NU2280 32580 400 720 185 6 6 485 4300 7800 800 950 435 680 5 5 344
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