What materials are compatible with CNC milling?

CNC milling is a precise and adaptable manufacturing process capable of working with a wide range of materials. Its versatility allows it to serve industries such as aerospace, medical, automotive, and consumer electronics, where different material properties are required.  CNC Milling enables manufacturers to machine parts from both metals and plastics while maintaining tight tolerances and high surface quality.

Metals

Metals are commonly used in CNC milling due to their strength, durability, and ability to perform in high-stress environments. Materials like aluminum offer excellent machinability and corrosion resistance, while stainless steel is valued for its strength and resistance to extreme conditions. Brass and copper provide good electrical conductivity and ease of machining. Titanium is chosen for its high strength-to-weight ratio and biocompatibility, making it suitable for medical and aerospace applications. Tool steels and carbon steels are often used in heavy-duty mechanical and industrial components where wear resistance is essential.

Plastics

Plastics are also well-suited for CNC milling, offering benefits like reduced weight, chemical resistance, and electrical insulation. ABS is commonly used for general-purpose parts due to its ease of machining. Polycarbonate offers clarity and impact resistance, while nylon provides strength and flexibility. PEEK is used in high-performance applications because of its thermal and chemical resistance. Delrin, or acetal, is valued for its low friction and dimensional stability, making it ideal for moving components and precise mechanical parts.

Composites

Composite materials such as carbon fiber-reinforced polymers and fiberglass-reinforced plastics can also be milled, though they require specialized tools and careful handling. These materials combine light weight with high strength and are frequently used in industries where performance and weight savings are critical, such as aerospace, automotive, and sporting goods.

Conclusion

CNC milling supports a wide variety of materials, giving designers and engineers the freedom to choose the best option for their application. Whether the need is for strength, precision, heat resistance, or lightweight properties, CNC milling offers a reliable solution for both prototyping and full-scale production across numerous industries.