... ),gears (pinions, wheels ) bearing, bearing seat, spring, connector, socket, bushing, push-button, etc.Surface Finishannealing, natural anodization, heat treatment, polishing, nickel plating ... , milling, drilling, grinding, broaching, welding and assemblyQC (inspection everywhere ):Technicians self-check in productionSize140*150*50mm or customizedTolerance±0.01mmoffset distance ...