... machining, Strict inspectiWe mainly offer standard gear and nonstandard gear according drawings. Material C45, cast iron and stainless steel ect.Material :carbon ... Steel, Carbon Steel, S tainless Steel, Harden & Tempered Steel, Cast Iron, Aluminum,Copper,Brass and so on.2. Heat Treatment: Hardening ... on Drawing analysis, Meeting discussing, program auditing, PC & QC Supply worm gear reducer (chart)