... .Surface: none 5.OEM is available. 1. Our CNC machining products covers various materials ranging from aluminiums, steel, stainless steels ... turning, milling, grinding, drilling, reaming etc.4. Micro machining is availabe for our machining products, such as polishing, precise grinding,etc.5. The ... rusting without using any oil. 304 stainless steel CNC machining bushing for supercharger mounting tabs