Needle roller bearings are rotational motion bearings in which a thin needle-shaped roller is incorporated into a rolling element.
They have a low cross-section height and high load capacity compared with ball bearings.
Being small, needle roller bearings contribute to reducing overall machine size, and are thus widely used in various applications such as automobiles, motorcycles, printing presses, industrial robots and construction equipment.
| Bearing Designation | Boundary dimensions |
| With crowned outer ring sholed type | With cylindrical outer ring sealed type | weight | D | d | C | B | G |
| foregin | China | foregin | China |
| g | mm |
| CF 4 B | | CF 4 BUU | | 7.4 | 12 | 4 | 8 | 20 | M4X0.7 |
| CF 5 B | KR 13 | CF 5 BUU | KR 13 PP | 10.3 | 13 | 5 | 9 | 23 | M5X0.8 |
| CF 6 B | KR 16 | CF 6 BUU | KR 16 PP | 18.5 | 16 | 6 | 11 | 28 | M6X1 |
| CF 8 B | KR 19 | CF 8 BUU | KR 19 PP | 28.5 | 19 | 8 | 11 | 32 | M8X1.25 |
| CF 10 B | KR 22 | CF 10 BUU | KR 22 PP | 45 | 22 | 10 | 12 | 36 | M10X1.25 |
| CF 10-1 B | KR 26 | CF 10-1 BUU | KR 26 PP | 60 | 26 | 10 | 12 | 36 | M10X1.25 |
| CF 12 B | KR 30 | CF 12 BUU | KR 30 PP | 95 | 30 | 12 | 14 | 40 | M12X1.5 |
| CF 12-1 B | KR 32 | CF 12-1 BUU | KR 32 PP | 105 | 32 | 12 | 14 | 40 | M12X1.5 |
| CF 16 B | KR 35 | CF 16 BUU | KR 35 PP | 169 | 35 | 16 | 18 | 52 | M16X1.5 |
| CF 18 B | KR 40 | CF 18 BUU | KR 40 PP | 250 | 40 | 18 | 20 | 58 | M18X1.5 |
| CF 20-1 B | KR 47 | CF 20-1 BUU | KR 47 PP | 386 | 47 | 20 | 24 | 66 | M20X1.5 |
| CF 20 B | KR 52 | CF 20 BUU | KR 52 PP | 461 | 52 | 20 | 29 | 66 | M20X1.5 |
| CF 24 B | KR 62 | CF 24 BUU | KR 62 PP | 815 | 62 | 24 | 29 | 80 | M24X1.5 |
| CF 24-1 B | KR 72 | CF 24-1 BUU | KR 72 PP | 1140 | 72 | 24 | 29 | 80 | M24X1.5 |
| CF 30 B | KR 80 | CF 30 BUU | KR 80 PP | 1870 | 80 | 30 | 35 | 100 | M30X1.5 |
| CF 30-1 B | KR 85 | CF 30-1 BUU | KR 85 PP | 2030 | 85 | 30 | 35 | 100 | M30X1.5 |
| CF 30-2 B | KR 90 | CF 30-2 BUU | KR 90 PP | 2220 | 90 | 30 | 35 | 100 | M30X1.5 |
Needle roller bearings series:
· Needle Roller Bearing (Series NK,NKS, RNA49, RNA48, NKI, NKIS, NA49, NA48, RNA69, NA69, RNA49..RS, RNA49..2RS, NA49..RS, NA49..2RS, RNAO, NAO, IR, LR, RNAV, NAV, RPNA, PNA etc.)
· Stud Type Track Roller (Series KR, KRE, KR..PP, KRE..PP, KRV, KRVE, KRV..PP, KRVE..PP, NUKR, NUKRE etc.)
· Yoke Type Track Roller Bearing (Series RSTO, RSTO..X, STO, STO..X, RNA22..2RS, RNA22..2RSX, NA22..2RS, NA22..2RSX, NATR, NATV, NUTR, NUTR..X etc.)
· Axial Bearing (Series AXK, AXW, K811, K812, K893, K874, K894, K/KS, KK/KKS, KZK, KBK, KNL etc.)
· Drawn Cup Needle Roller Bearing (Series HK SCE SCH, BK BCE BCH, HK..RS, HK..2RS, BK..RS etc
| track roller bearing types: | | |
| Yoke type track rollers | without axial guidance | | RSTO, STO, RNA22…2RS, NA22…2RS, |
| with axial guidance | | NATR…PP |
| full completment | NATR, NATV…PP, NATV, NUTR, PWTR...2RS, NNTR…2ZL, |
| Stud thread type track roller | with axial guidance | | KR…PP, KR, KRE…PP, KRV…PP, NUKR, NUKRE, PWKR…2RS, PWKRE…2RS |
| track roller | sealed | double row | LFR..2Z, LR50, LR52, LR53 |
| single row | LR6, LR2, KLR |
| Stud type track roller | sealed | double row | ZL52…DRS, ZLE52…2Z, KR52…2RS |
| single row | ZL2…DRS |
