LML Metal Products Ltd.

         CNC Machining Surface Finishes                We can generate instant quotes for 10+ surface finishes. As machined (Ra 3.2μm / Ra 126μin) This is our standard finish. Parts are machined and deburred, sharp edges are chamfered. Smooth machining (Ra 1.6μm / Ra 63μin) Smooth machining is like an ‘As machined’ finish but with slightly less evident machine marks. Parts are machined at a lower feed, no hand polishing is applied. Polishing (Ra 0.8μm / Ra 32μin) Parts are manually polished in multiple directions. Surface is smooth and slightly reflective. Brushed (Ra 1.2μm / Ra 47μin) Parts are brushed manually with #400 - 600 grit sandpaper in order to reduce machining marks. Ideal to slightly reduce the roughness of the finish. Bead blasted Parts are bead blasted with glass beads which results in a grainy texture and reduced machining marks. Powder coated Powder coating is a strong, wear-resistant finish that is compati...

Secondary Operations Secondary operations are processes or techniques are generally performed on manufactured parts to improve their physical appearance or tolerances.  In a CNC machining unit, the primary operation is to form or fabricate a part or component from a sheet metal or plastic as per the required size and dimensions. This is done through various machining techniques such as milling, turning, forming, tapping, and many more.  However, this is not enough and final touches need to be given to the part or product.  Secondary operations mainly comprise such as fine tuning techniques such as polishing, surface finishing, coating, and so on. It also includes testing and inspection techniques to check the functionality of the product or circuit boards. Princeton Industrial has an exclusive and efficient department which offers secondary operations for various types of CNC machine services.  This enables us to supply our customers with high-quality CNC machined pa...