实物小图3
实物小图1

Needle Roller Bearings

Needle roller bearings are essentially cylindrical roller bearings except that their cylindrical rollers have a length 3 to 10 times their diameter (versus a length less than 3 times their diameter). Even though they have a low cross section, needle roller bearings have a high radial load capacity and are exceptionally apt for bearing applications where radial space is limited. 

There are numerous types available, and many have no inner rings. The drawn-cup type has a pressed steel outer ring and the precision (solid) type has a machined outer ring. There are also cage-and-roller assemblies without rings. Most bearings have pressed steel cages, but some are without cages.

 

 

 

Needle Roller Bearings with Double Ribs (Double Locking Rings) on Outer Ring(Non-standard)
48 series NA 4822-NA 4876 49 series NA 4900-NA 4928
59 series NA 5902-NA 5917 69 series(Non-standard) NA 6900-NA 6920
NKI series(Non-standard)     NKI 5/12-NKI 140/32
NKIS series and other Non-standard series     NKIS 6-NKIS 100
Needle Roller Bearings with Oil Holes on the Outer Rings and Double Ribs(Flat Retainer Rings)
49 series(Non-standard) NAV 4902-NAV 4930 40 series(Non-standard) NAV 4002-NAV 4017
Needle Roller Bearings without Ribs on the Outer Rings
NAO series NAO 6×17×10 - NAO 90×120×30    
NAOV series      
Needle Roller Bearings with Double Ribs(Double Locking Rings) on the Outer Ring but without Inner Rings
48 series RNA 4822-RNA 4876 49 series(Non-standard) RNA 49/8 RNA 49/9A
49 series RNA 4900-RNA 4928 59 series(Non-standard) RNA 59/7A RNA 59/8A
59 series RNA 5906-RNA 5915 69 series(Non-standard) RNA 6900-RNA 6920
Also produce 40 series, 50 series, 60 series and other Non-standard series.
Needle Roller Bearings without Inner Rings    
NK series(Non-standard) NK 5/10-NK 145/42 NKS series NKS 8-NKS 80
BR series BR 101812-BR 648032 BRI series BRI 61812-BRI 568032
Also produce HJ series, MR series,TR series
Needle Roller Bearings without Inner Rings and Cages    
48 series RNAV 4832-RNAV 4864 49 series RNAV 4901-RNAV 4926
40 series RNAV 4002-RNAV 4016    
Also produce 69 series and Non-standard series
Needle Roller Bearings with Cages but without Inner Rings and Ribs on the Outer Rings
RNAO series RNAO 5×10×8-RNAO 130×150×24    
Double Row Needle Roller Bearings with Cages but without Inner Rings and Ribs on the Outer Rings
RNAO 16×24×20 ZW-RNAO 80×100×60 ZW      
Drawn Cup Needle Roller Bearings    
BK 0306-BK 7024 HK 0306-HK 7024 TLA 0608-TLA 5020  
Drawn Cup Round end Needle Roller Bearings with Cages but without Inner Rings
BKH series   BKH 0810-BKH 4524 HKH series HKH 0810-HKH 4524
Non-standard series HK/5×8.5×7-HK/60×68×32 2RS Non-standard series BK/8×12×15-BK/60×68×12
Inch Drawn Cup Needle Roller Bearings
SCE series BCE series SCH series BCH series
Also produce SN, CS, CSN series and other Non-standard series.

 

 

 

 

DRAWN SHELL NEEDLE BEARINGS:
INCH SERIES: SCE, BCE, SCH, BCH, SN, CS, CSN
METRIC SERIES: HK, BK

CAGE AND ROLLER ASSEMBLIES: K, KZK, KBK

PRECISION GROUND NEEDLE BEARINGS: NA, RNA, NK, NKS, NKI, NKIS

INNER RINGS: IR, LR