CNC machined metal parts are essential components in a wide range of industries, from automotive to aerospace to electronics. However, an important part of the manufacturing process is the finishing of these parts, which goes beyond mere precision and focuses on aesthetics, functionality and durability. We will explore the types of finishes on metal CNC machined parts and why they are so crucial.

Polished Finished

‍

Polished finishing is a popular choice for CNC machined parts that require a shiny, reflective appearance. This process involves the use of abrasive tools to remove surface imperfections, resulting in a smooth, shiny finish. It is common on high-end components, such as luxury fixtures and precision machine parts.

‍

‍

Brushing Finished

‍

The brushed finish is achieved by brushing the surface of the metal with metallic or abrasive bristles in a uniform direction. This creates parallel lines on the surface, giving it a satin and elegant appearance. The brushed finish is ideal for applications where a sophisticated appearance and moderate scratch resistance are needed, such as door frames and furniture.

‍

Sandblasting 

‍

Sandblasting involves firing abrasive particles at high velocity against the surface of the metal. This creates a uniform, matte texture on the surface, which improves adhesion of coatings and reduces light reflection. Shot blast finishing is common in industrial and marine applications where corrosion resistance is a priority.

Anodized Finish

‍

Anodized finishing is especially relevant for machined aluminum parts. In this process, the part is immersed in an acid bath and an electric current is applied to create an oxide layer on the surface. This layer not only improves appearance and corrosion resistance, but can also be colored for additional customization.

‍

‍

Electroplating

‍

Electroplating involves immersing the part in an electrolytic solution to remove imperfections and give it a uniform appearance. This process is common in the electronics and automotive industries, where high precision and a uniform appearance are required.

‍
‍

These are just a few examples of the types of metal CNC machined part finishes available. Choosing the right finish depends on factors such as application, work environment and aesthetic needs. In addition to improving appearance, proper finishes can play a critical role in the functionality and durability of metal CNC machined parts. Therefore, when considering the fabrication of high-quality metal parts, don't underestimate the importance of choosing the right surface processing

‍

We invite you to watch our free webinar to learn more about the types of metal finishing.