... 5.make as per drawing Item NO. types of motor couplingsMaterialsIron, aluminum, steel, copper, plastic, carbon ... DimensionsAccording to customer’s drawingSurface treatmentHeat treatment, polishing, PVD/CVD coating, galvanized, electroplating, ... grinding machine, automatic lathe machine, conventional lathe machine, milling machine, drilling machine, EDM, wire-cutting machine, CNC bending machine etc ...