Industrial Sprocket 1)Material:C45 steel, Cast Iron 2)Standard:DIN,ANSI, ... -Machining-Hobbing standard and non-standard sprocketssprockets and platewheels,ASA sprocket and platewheels,finished bore sprockets,stainless steel sprockets,taper bore ... ,ball bearing idler sprockets,double single sprockets,ASA standard sprockets sprocket and chain