Needle rollers provided by SMZ has a complete set of breeds and spec and they are made by bearing steel, rigidity is HRC60~64, roughness of the surface Ra is less than 0.2.

Dimension range of cylindrical roller: Dw: 3~30, Lw: 5~50; They are made of GCr15 steel (bearing steel), its rigidity is HRC60~64; Roughness of the surface Ra is less than 0.2. We also produce piston pin, crank pin and other pins and they usually are made of Gcr15 steel (bearing steel), their precision, rigidity and roughness of the surface are in accordance with the standard in the relevant industry and can satisfy demand of the users.
NRB 1X7.8
NRB 1.5X5.8
NRB 1.5X6.8
NRB 1.5X7.8
NRB 1.5X9.8
NRB 1.5X11.8
NRB 1.5X13.8
NRB 2X6.3
NRB 2X7.8
NRB 2X9.8
NRB 2X11.8
NRB 2X13.8
NRB 2X15.8
NRB 2X17.8
NRB 2X19.8
NRB 2X21.8
NRB 2.5X7.8
NRB 2.5X9.8
NRB 2.5X11.8
NRB 2.5X13.8
NRB 2.5X15.8
NRB 2.5X17.8
NRB 2.5X19.8
NRB 2.5X21.8
NRB 2.5X23.8
NRB 3X9.8
NRB 3X11.8
NRB 3X13.8
NRB 3X15.8
NRB 3X17.8
NRB 3X19.8
NRB 3X21.8
NRB 3X23.8
NRB 3.5X11.8
NRB 3.5X13.8
NRB 3.5X15.8
NRB 3.5X17.8
NRB 3.5X19.8
NRB 3.5X21.8
NRB 3.5X29.8
NRB 3.5X34.8
NRB 4X11.8
NRB 4X13.8
NRB 4X15.8
NRB 4X17.8
NRB 4X19.8
NRB 4X21.8
NRB 4X23.8
NRB 4X25.8
NRB 4X27.8
NRB 4X29.8
NRB 4X34.8
NRB 4X39.8
NRB 5X15.8
NRB 5X19.8
NRB 5X21.8
NRB 5X23.8
NRB 5X25.8
NRB 5X27.8
NRB 5X29.8
NRB 5X34.8
NRB 5X39.8
NRB 6X17.8