Needle varieties DF provided, specifications, needle roller bearings NA6903, material from the bearing steel, roller bearings, hardness HRC60 ~ 64, needle roller bearings NKI17 / 20, the surface roughness Ra of not more than 0.2 Cylindrical Roller size range : Dw: 3 ~ 30, Lw: 5 ~ 50; material from the GCr15 steel (bearing steel) manufactured, its hardness is HRC60 ~ 64; surface roughness Ra of not more than 0.2 I also mass production piston pin, crank pin and other pins child, usually with Gcr15 steel (bearing steel) manufacturing, needle roller bearings NA4903, its accuracy, surface hardness and roughness are in line with industry standards, or to meet user requirements main structure: bearing code structural features Dw X Lw round roll PDw X Lw blunt needle roller bearings without ribs inner ring needle roller bearing inner ring with a ring of wedge-type one-way clutch gear one-way one-way clutch bearing clutch single row full circle needle roller bearings needle and thrust ball bearings and needle roller thrust bearings Changzhou Enke Bearing the company is complete, and work well. Needle roller bearings NKI17 / 20, needle roller bearings, needle roller by LINQing municipal governance and needle roller bearings plant. Linqing municipal and needle roller bearings plant (www.zhgzzc.com) (www.zhgzzc.net) strong, credible, in other industries, Liaocheng accumulated a large number of loyal customers. The company better work attitude and constantly improve governance and innovative ideas will lead the needle into the brilliant and you work for a better future!