1) Metric series and inch series:
Matric series: STO, RSTO, NA22...2RS, RNA22...2RS, NATR, NATR...PP, NATV, NATV...PP, NUTR, etc, KR, KRE, KR...PP, KRE...PP, KRV, KRV...PP, KRVE...PP, NUKR, etc.
Inch series: CRY...V, CRY...VUU, etc, CR, CRH
2) Material: GCR 15, with the hardness of 56-65HRC.
3) Main products: Yoke type track roller and stud type track roller
Yoke type track: With IR and without IR,
TN= plastic cage, permissable operating temperature: 120° C (continuous operation)
F= raceway diameter of inner ring
Fw= needle roller enveloping circle in the tolerance Zone F6
X= the suffix X indicates a cylindrical outside surface: E. G. NATR5 X or NATR5 ppx