CNC Service : Contract manufacturing from Lien Cheng gives you the most up-to date CNC machining in all process. Producing under computerization and automation has the advantages of cost down, improving product's efficiency. We rely on the accuracy of CNC equipment to insure the best quality precision machining Parts size (Diameter) : from 1.00mm up to 42mm Material : free-cutting steels, brass, bronze, aluminium , stainless steel and silver..etc Primary Machinery : CNC precision turning lathe (Citizen, Jenn Wei) Secondary: operation services offered : grooving, drilling, broaching, milling, knurling, tapping. grinding, heat treating, rotary transfer operation, slotting and a variety of plating technologies.