Time Belt gear 1.Material: steel 2.MOQ: 100 pieces 3.Good quality ... , cast steel, cast iron, forged steel, stainless steel, alloy steel, plastic, nylon, POM, aluminium alloy, zn alloy, bronze, brass, chrome, 40Cr ... , zincing, nickelage. Machine: CNC engine lathe, milling machine, drilling mchine, gear shaper, hobbing machine, grinder.