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Cylindrical Roller Bearings

Cylindrical Roller Bearings

  • 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
NU1034M 32134 170 260 42 2.1 2.1 193 287 415 2200 2800 185 244 2 2 8.23
NJ1034M 42134 170 260 42 2.1 2.1 193 287 415 2200 2800 185 244 2 2 8.46
NU3034M 3032134 170 260 67 2.1 2.1 193 510 875 2200 2800 185 244 2 2 13.4
NU3134M 3032734 170 280 88 2.1 2.1 200 665 1080 2000 2400 185 263 2 2 22
N234M 2234 170 310 52 4 4 272 520 780 1800 2200 190 288 3 3 18.2
NU234EM 32234EH 170 310 52 4 4 208 475 635 1800 2200 190 288 3 3 17.7
NJ234EM 42234EH 170 310 52 4 4 208 475 635 1800 2200 190 288 3 3 18.1
NU2234EM 32534EH 170 310 86 4 4 205 925 1330 1800 2200 190 288 3 3 31.5
NU3234M 170 310 110 4 4 208 915 1470 1800 2200 190 288 3 3 37.9
N334M 2334 170 360 72 4 4 310 795 1010 1400 1700 190 337 3 3 37.3
NU334M 32334 170 360 72 4 4 220 795 1010 1400 1700 190 337 3 3 37.7
NJ334M 42334 170 360 72 4 4 220 795 1010 1400 1700 190 337 3 3 38.4
NU2234EM 32534EH 170 360 86 4 4 205 960 1500 1800 2200 190 337 3 3 29
NU2334M 32634 170 360 120 4 4 220 1220 1750 1400 1700 190 337 3 3 63.7
NJ2334M 42634 170 360 120 4 4 220 1220 1750 1400 1700 190 337 3 3 64.7
NU3334M 170 360 140 4 4 220 1350 1980 1400 1700 190 337 3 3 72.1
NU3836M 180 225 34 2.1 2.1 191.5 192 405 2200 2800 189 214 2 2 3.15
NU1936M 1032936 180 250 33 2.1 2.1 198 219 355 2200 2800 191 236 2 2 4.92
NU2936M 2032936 180 250 42 2.1 2.1 198 255 430 2200 2800 191 236 2 2 6.18
NU1036EM 32136EH 180 280 46 2.1 2.1 205 380 565 1800 2400 195 263 2 2 10.2
NJ1036EM 42136EH 180 280 46 2.1 2.1 205 380 565 1800 2400 195 263 2 2 10.8
NU3036M 3032136 180 280 74 2.1 2.1 206 365 955 1800 2400 195 263 2 2 17.4
NU236EM 32236EH 180 320 52 4 4 217 625 850 1700 2000 200 297 3 3 18
NJ236EM 42236EH 180 320 52 4 4 217 625 850 1700 2000 200 297 3 3 18.6
NUP236EM 92236EH 180 320 52 4 4 217 625 850 1700 2000 200 297 3 3 21.4
NU2236EM 32536EH 180 320 86 4 4 215 1010 1510 1700 2000 200 297 3 3 30.3
NJ2236EM 42536EH 180 320 86 4 4 215 1010 1510 1700 2000 200 297 3 3 31
NUP2236M 92536 180 320 86 4 4 215 960 1580 1700 2000 200 297 3 3 32.1
NU3236M 3032236 180 320 112 4 4 218 950 1560 1700 2000 200 297 3 3 39.6
N336M 2336 180 380 75 4 4 330 910 1150 1500 1800 200 356 3 3 39.6