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Surfavce Treatment of CNC Machined Parts

Feb. 18, 2020

CNC machining can produce parts with tight tolerances and fine parts from a variety of metal or plastic materials. Due to the degrading nature of the machining process, the surface of the part will have smaller tool marks after machining. However, we can use multiple methods to improve the surface roughness, visual performance and wear resistance of CNC machined parts. The most common metal CNC surface finishes listed below by CNC Machined Brass Plain Components Manufacturer can help you choose the surface finish that best suits your application.

1.such as machining

Complete options, fastest turnaround time. The part has small visible tool marks and possibly sharp edges and burrs, which can be removed on request. The standard processed surface roughness (Ra) is 3.2 μm. Surface finish requirements can be increased to 1.6, 0.8 and 0.4 μm.

2. Bead Blasting

Bead blasting adds uniform matte or satin finish to machined parts to remove tool marks. It is mainly used for visual purposes.

3. Anodizing (type II or III)

Type II: Adds a corrosion-resistant ceramic layer on the surface of machined parts. Can be dyed in different colors-the most common are transparent, black, red and gold. It is usually associated with aluminum and titanium.

Type III: Wear-resistant and corrosion-resistant ceramic layer is added on the surface of the part. It is thicker than the O type and provides better protection. Available for aluminum and titanium only.

4. Powder coating

This is a process in which powder coating is sprayed onto a part and then baked in an oven. This results in a strong, wear-resistant, and corrosion-resistant layer that is more durable than standard coating methods. Compared with anodizing, it has higher impact resistance. Available in multiple colors. Can be applied to any metal.


This is a process that uses current to reduce dissolved metal cations so that they form a thin, coherent metal coating on the electrode. The coating helps prevent corrosion and improves abrasion resistance, conductivity, reflectivity and aesthetics.

Custom CNC Precision Parts

Custom CNC Precision Parts

6. Customized finishing

CNC machining is a manufacturing process that enables Custom CNC Precision Parts to improve efficiency through higher levels of automation and allowing the machine and its computer control to do all the work. As you can imagine, CNC machining has many advantages in custom machining CNC parts.

(1)Automation: CNC machining eliminates the operator's need for all work except part of the job. The CNC machine can be left unattended for hours or even days when necessary, enabling the operator to focus on other tasks .

(2)Repeatability: Once the design is sent to the computer, the CNC machine can repeat the manufacturing process multiple times. In addition, you will always get high accuracy in your components.

(3)Material range: CNC processing can be used to manufacture products of various materials. These include bronze, steel, aluminum, and gold and silver. Polymers such as ABS, polycarbonate and polytetrafluoroethylene can also be used with the machine.

(4)Flexibility: CNC machines can be completely reprogrammed within hours to produce completely different products.

The above is the surface treatment of CNC machined parts introduced by CNC Turning Iron Part Factory.