CNC milling is a subtractive manufacturing process where a computer-controlled machine precisely removes material from a workpiece to create a desired shape. The process involves a rotating cutting tool that moves along multiple axes, controlled by a computer program, to carve out intricate designs from various materials. In the case of a three-axis milling machine, the table typically moves on the X and Y axis and the spindle moves on the Z axis. Three-axis mills are the most common type of milling machine, making parts manufactured on them versatile and affordable.