7 Ways of Surface Finishing for Machined Parts

surface finishing - featured image

By Alice,WayKen Project Manager

In the rapid manufacturing industry, a variety of surface finishes are used. Surface finishing refers to the formation of a surface layer with one or more special properties on the surface of a material by physical or chemical means. Surface finishing can improve the appearance, wear resistance, corrosion resistance, hardness, strength, and other characteristics of the parts.

1.As machined

As machined is one common surface finishing, and the surface of a part formed by CNC machining has a clear machined pattern and a surface roughness of Ra 0.2 to Ra 3.2. Surface finishes such as deburring and sharp edges are usually applied. This surface is suitable for all materials

machine finishing


Polishing is a surface finishing that uses mechanical, chemical, or electrochemical action to reduce the surface roughness of a workpiece in order to obtain a bright, flat surface.

polished finishing

3.Bead blasting

Sandblasting is a surface finishing process that uses the impact of a high-speed sand stream to clean and roughen the surface of the parts so that the surface parts obtain a certain degree of cleanliness and roughness.


Anodizing is a surface finishing that uses the electrochemical oxidation of metals or alloys to form an oxide film on the surface of the part, which prevents wear and oxidation of the part and also increases the aesthetic effect. Different colors can be achieved on the surface of the part. This type of surface finishing is only applicable to metal parts.

anodized finishing


Zine plating is a surface finishing that plates a thin layer of zinc on the metal surface, which can prevent metal oxidation, improve wear resistance, corrosion resistance and enhance aesthetic effects. The surface of the part can also be plated with copper, nickel, silver and gold. This type of surface finishing only applicable to metal parts.


Painting is a surface finishing in which a layer of paint is applied to the surface of the part. The color can be modulated according to the customer’s needs, and the surface can be achieved in matte, glossy, or metallic luster.


Surface brushing is a surface finishing that forms a linear surface texture on the surface of the parts by grinding the product to provide a decorative effect.

brush finishing
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