Industrial Sprocket 1)Material:C45 steel, Cast Iron 2)Standard:DIN, ... JIS 3)Processing:Forgin-Machining-Hobbing sprockets and platewheels,ASA sprocket and platewheels,finished bore sprockets,stainless steel sprockets,taper ... ,platewheels for conveyor chain,taper top wheels,ball bearing idler sprockets,double single sprockets,ASA standard sprockets. sprockets, chain sprockets industrial sprocket