CNC milling, or Computer Numerical Control milling, is a sophisticated machining process that utilizes computerized controls to precisely cut and shape various materials. It is a subtractive manufacturing technique, meaning it removes material from a workpiece to achieve the desired shape. CNC milling machines are equipped with rotary cutting tools that can move along multiple axes, allowing for intricate and precise three-dimensional machining.

The process begins with a digital design or Computer-Aided Design (CAD) model, which is translated into a set of instructions for the CNC milling machine through Computer-Aided Manufacturing (CAM) software. These instructions guide the machine's movements, directing the cutting tool to remove material with high accuracy and repeatability.

CNC milling is widely used in industries such as aerospace, automotive, electronics, and prototyping due to its ability to produce complex parts with tight tolerances. The technique accommodates a variety of materials, including metals, plastics, and composites. Its automation and programmability enhance efficiency and consistency in manufacturing processes, enabling the production of intricate components that would be challenging or impossible to achieve with traditional manual methods. CNC milling has revolutionized modern manufacturing by offering a precise and scalable solution for creating intricate components across diverse industries.