... 4140 Alloy steel. stainless steel . C45 various precision shaft size 10mm to 2000 cm 1) stainless steel2) ... also 50 set lathe , 20 Set grinder allow we achieve complet crankcase,shaft ,precision fitting ,heteromorphism parts maching service ... Titanium Cusotmer design raw material please check with us Surface treatmentBlacking,polishing,anodize,chrome plating,zinc plating,nickel platingPrecision ...