... excellent surface treatment 5.make as per drawing Item NO. drive shaft couplingMaterialsIron, aluminum, steel, copper, plastic, carbon ... , solder alloy, HSS, tool steels, or as per the customers’ requirements.DimensionsAccording to customer’s drawingSurface treatmentHeat treatment, ... and so on.PackingWooden box, or as per the customer’s requirementsProcessing equipmentsCNC machining center, CNC lathe, ...