Why do CNC machined precision parts need surface treatment?

At present, precision parts in many industries are processed by CNC, but the surface of many products is still relatively rough after CNC processing, and secondary surface finishing is required at this time.


First of all, surface treatment is not suitable for all CNC processed products. Some products can be used directly after processing, while others require special processes such as manual polishing, electroplating, oxidation, laser engraving, silk screen printing, and powder spraying. Here are a few things you must know about surface treatment.

CNC precision parts surface treatment



  1. Improve product accuracy; after the product is processed, the surface of some products is relatively rough and leaves a large residual stress, which will reduce the product accuracy and affect the matching accuracy between parts. In this case, product surface treatmentis required.


  1. Provide product wear resistance; if the parts interact with other parts in normal use scenarios, long-term use will increase the wear of the parts. In this case, the surface of the product needs to be processed to prolong the service life of the parts.


  1. Improve the corrosion resistance of the product; parts that are used in highly corrosive places for a long time require special surface treatment, and need to be polished, polished and sprayed with anti-corrosion materials. Improve the corrosion resistance and service life of the product.

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