1) investment casting gears 2)CNC,CMM 3)ISO9001:2000,ERPsystem 4)100% inspection on critical dimension 5)Ten-year experience investment casting gears + drawings Detail descriptionsmaterialCopper, brass, bronze, aluminum bronze, tin bronze, silicon bronze, manganese brassAnd other copper alloy Processing stepCasting, sand blast, CNC lathe works, turning, finish machining featuresSmooth surface, ...