... ,Maching, 2.Hobbing, Broaching, 3.Material: C45, 20CrMnTi, 40Cr, 42CrMo We supply: ISO, DIN, ANSI, JIS, BS standard sprocket1) Standard ... OEM made according to customers' designsMaterial:carbon steel such as C45, 20CrMnTi, 40Cr, 42CrMo or stainless steel or copper or ... sprocket, standard and non-standard sprockets, etc2.Material: C45, A3...According to ISO, DIN, ANSI, JIS, BS standard 3.Chain sprocket, ...