CNC milling parts are created by using CAD software to design a 3D model of the desired part. The software is then used to generate instructions that are sent to the CNC machine. The machine uses a variety of cutting tools to remove material from the workpiece in order to create the desired shape.
One of the key advantages of CNC milling is that it is highly repeatable and precise. This makes it ideal for producing parts in large quantities with consistent quality. It is also able to produce parts with a high degree of complexity that would be difficult or impossible to create using traditional milling methods.