sprocket blank sprocket application:elevvator,industry sector material:brass sprocketblank sprocketmaterial:casting steel,forging steel, casting iron,steel alloy(30CrMnSi,20Cr ,9310,4303and so on)exoit material:brass,bronze,phenolic,nylon,delrin and othersprocessing:machine turning,machining milling,grinding,finish,heat treatmentavailable finish:.polishing·Powder Coating·Electrophoresis·Chrome ...