Available Surface Finishes of CNC Machining
Surface finishing techniques can either be for functional or aesthetic purposes. Each technique has requirements, such as materials, color, texture. High-tolerance CNC milling, turning parts are not recommended to apply secondary metal surface finish, because the treatment may change the sizes of the finished part through removing or adding a small amount of materials. Below are the specifications of the plastic and metal finishing techniques rendered by us.
| Finish | Image | Description | Material | Color | Texture |
|---|---|---|---|---|---|
| As-machined |  | The standard finish for our parts, the “as machined” finish, has a surface roughness of 3.2 μm (126 μin), which removes sharp edges and deburs parts cleanly. | All materials | n/a | Stain |
| Abrasive Blasting |  | Abrasive blasting is the process of powerfully propelling, generally with high pressure, a stream of blast media against a surface to remove unwanted coating layers and surface impurities. | Aluminum, Steel, Stainless Steel, Brass, Copper | n/a | Matte |
| Anodizing |  | Keeping our parts in the long term, our anodizing process resists corrosion and wear. It’s also an ideal surface treatment for painting and priming, and it looks great too. | Aluminum | Clear, black, grey, red, blue, gold | Smooth, matte |
| Electroplating |  | Electroplated coating preserves the surface of parts and resists rusts and other defects from causing decay by applying electric currents to reduce metal cations. | Aluminum, Alloy Steel, Stainless Steel, Brass, Copper | Gold, silver, nickel | Smooth, glossy |
| Polishing |  | Ranging from Ra 0.8~Ra0.1, polishing processes use an abrasive material to rub the part’s surface to make them shine more less shiny, depending on your requirements. | All materials | n/a | Smooth, glossy |
| Powder Coating |  | Using corona discharge, we make the powder coating adsorbed to the part, creating a more wear-resistant layer with a typical thickness ranging from 50 μm up to 150 μm. | All metal materials | Custom | Glossy |
| Brushing |  | Brushing is a surface treatment process in which abrasive belts are used to draw traces on the surface of a material, usually for aesthetic purposes. | ABS, Aluminum, Brass, Stainless Steel, Steel | n/a | Satin |
| Painting |  | Painting involves spraying a layer of paint onto the surface of the part. Colors can be matched to a Pantone color number of the customer’s choosing, while finishes range from matte to gloss to metallic. | Aluminum, Stainless Steel, Alloy Steel | Custom | Gloss, semi-gloss, flat, metallic, textured |
| Black Oxide |  | Black oxide is a conversion coating similar to Alodine that is used for steel and stainless steel. It is used mainly for appearance and for mild corrosion resistance. | Steel, Stainless Steel | Black | Smooth, matte |
| Alodine |  | Chromate conversion coating, known as Alodine, is a chemical coating that passivates and protects aluminum from corrosion. It is also used as a base layer before priming and painting parts. | Aluminum | Custom | Smooth, matte |
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