... various roughcast, machining finished product over 10 yea high quality die casting aluminum die cast rotor1.OEM service available 2.Materials: stainless steel,cast ... ,non-ferrous,grey iron,ductile cast iron and so on 3.Process: lost wax process, soluble glass process , silicon process ... polishing,machining,machining center,plating,Heat Treatment,ect. high quality die casting aluminum die cast rotor