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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
N326M 2326 130 280 58 4 4 243 550 720 1800 2200 149 258 3 3 17.8
NJ2226X3 130 240 72 158 630 850 2200 2800 146 212 14.8
NJ2226EM 42526 130 230 64 3 3 153.5 530 735 2200 2800 146 212 2.5 2.5 12.9
NU2226EM 32526 130 230 64 3 3 153.5 530 735 2200 2800 146 212 2.5 2.5 12.5
N2226M 2526 130 230 64 3 3 204 400 630 2200 2800 146 212 2.5 2.5 11.6
NJ428M 42428 140 360 82 5 5 196 896 998 1700 2000 160 278 4 4 46.3
NJ2328EM 42628 140 300 102 4 4 180 1020 1380 1800 2200 160 278 3 3 41
NU2328EM 32628 140 300 102 4 4 180 1020 1380 1800 2200 160 278 3 3 35.8
N2328M 2628 140 300 102 4 4 260 880 1300 1800 2200 160 278 3 3 34.6
NUP328M 92328 140 300 62 4 4 180 610 805 1800 2200 160 278 3 3 24.5
NU328EM 32328EH 140 300 62 4 4 180 665 880 1800 2200 160 278 3 3 23.7
NF328M 12328 140 300 62 4 4 260 610 805 1900 2400 160 278 3 3 22.8
N328M 2328 140 300 62 4 4 263.6 610 805 1900 2400 160 278 3 3 21.9
NJ2228M 42528 140 250 68 3 3 169 475 760 2000 2600 157 232 2.5 2.5 14.8
NU2228EM 32528EH 140 250 68 3 3 169 550 790 2000 2600 157 232 2.5 2.5 15.9
NUP228M 92228 140 250 42 3 3 169 345 490 2400 3000 157 232 2.5 2.5 9.51
NJ228EM 42228EH 140 250 42 3 3 169 395 515 2400 3000 157 232 2.5 2.5 9.43
NU228EM 32228EH 140 250 42 3 3 169 395 515 2400 3000 157 232 2.5 2.5 9.36
N228M 2228 140 250 42 3 3 221 345 490 2400 3000 157 232 2.5 2.5 9.14
NU3128M 3032728 140 225 68 2.1 2.1 162.5 390 625 2600 3400 155 209 2 2 10.6
NU3028M 3032128 140 210 53 2 2 158 330 630 2600 3400 152 196 2 2 7.64
NJ3330M 3042330 150 320 128 4 4 193 1250 1900 1400 1800 170 297 3 3 51
NU3330M 3032330 150 320 128 4 4 193 1250 1900 1400 1800 170 297 3 3 49.9
NF2330EM 12630EH 150 320 108 4 4 193 1160 1600 1700 2000 170 297 3 3 43.6
NJ2330EM 42630EH 150 320 108 4 4 193 1160 1600 1700 2000 170 297 3 3 42.4
NU2330EM 32630EH 150 320 108 4 4 193 1160 1600 1700 2000 170 297 3 3 41.5
NU330-113 150 320 65/108 4 4 193 715 890 1700 2000 170 297 3 3 29.6
NUP330M 92330 150 320 65 4 4 193 680 920 1700 2000 170 297 3 3 27.4
NJ330EM 42330EH 150 320 65 4 4 193 750 1020 1700 2000 170 297 3 3 27.2
NU330EM 32330EH 150 320 65 4 4 193 750 1020 1700 2000 170 297 3 3 26.8
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