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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
NU2952M 2032952 260 360 60 2.1 2.1 286 535 995 1900 2200 277 342 2 2 18.6
NU1052M 32152 260 400 65 4 4 296 645 1000 1500 1800 282 376 3 3 29.1
NUP1052M 92152 260 400 65 4 4 296 645 1000 1500 1800 282 376 3 3 37.2
NU252M 32252 260 480 80 5 5 320 985 1800 1100 1400 286 450 4 4 67.2
NU2052EM 2032152EH 260 480 82 5 5 294 1100 1800 1100 1400 283 450 4 4 40.5
NU2252M 32552 260 480 130 5 5 320 1710 2770 900 1200 286 450 4 4 111
NU352M 32352 260 540 102 6 6 336 1540 2090 900 1200 292 503 5 5 118
NU2352M 32652 260 540 165 6 6 336 2230 3350 900 1200 292 503 5 5 190
NU2856M 280 350 42 2 2 299 325 705 1800 2200 295 334 2 2 9.16
NU3856M 280 350 52 2 1.1 298 435 985 1700 2000 293 334 2 1 11.6
NU1956M 1032956 280 380 46 2.1 2.1 306 450 815 1800 2200 297 361 2 2 15.2
NU2956M 2032956 280 380 60 2.1 2.1 307 575 1150 1500 1800 297 361 2 2 20.2
NU1056M 32156 280 420 65 4 4 316 660 1050 1400 1700 302 395 3 3 30.8
NJ1056M 42156 280 420 65 4 4 316 660 1050 1400 1700 302 395 3 3 32.2
NU256M 32256 280 500 80 5 5 340 1140 1680 1000 1300 306 470 4 4 70.7
NU2256M 32556 280 500 130 5 5 340 1770 2950 900 1200 306 470 4 4 117
NU2356M 32656 280 580 175 6 6 362 2570 3950 900 1200 313 542 5 5 236
NU1960M 1032960 300 420 56 3 3 332 555 975 1600 2000 320 398 2.5 2.5 24.4
NU2960M 2032960 300 420 72 3 3 332 725 1370 1400 1700 320 398 2.5 2.5 30.3
NU1060M 32160 300 460 74 4 4 340 885 1400 1200 1500 323 435 3 3 44.9
NJ1060M 42160 300 460 74 4 4 340 885 1400 1200 1500 323 435 3 3 46.3
NU260M 32260 300 540 85 5 5 364 1400 2070 1000 1300 327 509 4 4 86.9
NUP260M 92260 300 540 85 5 5 364 1400 2070 1000 1300 327 509 4 4 90
NU2260M 32560 300 540 140 5 5 365 1960 3200 900 1100 327 509 4 4 145
NU360M 32360 300 620 109 7.5 7.5 385 2200 3350 900 1100 357 590 7 7 166
NU1964M 1032964 320 440 56 3 3 352 580 1050 1100 1400 340 418 2.5 2.5 25.7
NU2964M 2032964 320 440 72 3 3 352 755 1470 1100 1400 340 418 2.5 2.5 33.5
NU1064M 32164 320 480 74 4 4 360 905 1470 1100 1400 343 454 3 3 47.8
NJ1064M 42164 320 480 74 4 4 360 905 1470 1100 1400 343 454 3 3 47.8
NUP1064M 92164 320 480 74 4 4 360 905 1470 1100 1400 343 454 3 3 49.1
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