Surface treatment of CNC machined parts

CNC machining can produce parts with tight tolerances and delicate parts from a variety of metal or plastic materials. Due to the reduction of the machining process, the surface of the part will have smaller tool marks after machining. However, there are several methods we can use to improve the surface roughness, visual properties and wear resistance of CNC machined parts. The most common metal CNC machined finishes are listed below to help you choose the finish that is best for your application.

such as machining

Complete options, fastest turnaround time. Parts with minor visible tool marks and possibly sharp edges and burrs can be removed upon request. The standard machined surface roughness (Ra) is 3.2 μm. Surface finish requirements can be increased to 1.6, 0.8 and 0.4 μm.

bead blasting

Bead blasting adds a uniform matte or satin surface finish to machined parts and removes tool marks. Mainly used for visual purposes.

Anodizing (Type II or Type III)

Type II adds a corrosion-resistant ceramic layer to the surface of the machined part. Can be dyed in different colors - the most common are clear, black, red and gold. It is usually associated with aluminum and titanium.

Type III adds a wear and corrosion resistant ceramic layer to the surface of the part. It is thicker than Type O and provides better protection. Applies to aluminium and titanium only.

powder coating

This is a process in which powder coatings are sprayed onto parts and then baked in an oven. This creates a strong wear-resistant, corrosion-resistant layer that is more durable than standard coating methods. Higher impact resistance compared to anodizing. Available in multiple colors. Can be applied to any metal.

plating

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

Customized finishing

CNC machining is a manufacturing process that increases efficiency through higher levels of automation and allowing machines and their computer controls to do all the work. As you can imagine, CNC machining has several advantages in custom machining CNC parts.
1. Automation: CNC machining eliminates the need for the operator to do all but one part of the job. A CNC machine can be left unattended for hours or even days when necessary, allowing the operator to focus on other tasks .
2. Repeatability: Once the design is fed into the computer, the CNC machine can repeat the manufacturing process many times. Also, you will always get high precision in your components.
3. Material range: CNC machining can be used to manufacture products of various materials. These include bronze, steel, aluminum, as well as gold and silver. Polymers such as ABS, polycarbonate and teflon can also be used with the machine.
4. Flexibility: CNC machines can be completely reprogrammed in a matter of hours to produce completely different products.