... is flexible and high strength.2.The pinshaft is used alloy copper.It greatly improves the anti-wearing of the products ... so onFeathure:1.Material: Alloy Steel, Carbon Steel, S tainless Steel, Harden & Tempered Steel, Cast Iron, Aluminum,Copper,Brass and so on ... analysis, Meeting discussing, program auditing, PC & QC Supply various series worm gearbox