How does CNC turning work?

CNC turning is an affordable way to fabricate extruded aluminium parts that are (typically) symmetrical around a central axis of revolution. The workpiece is rotated at a speed determined by the computer, and a cutting tool is fed into the turning material. Unwanted material is shaved away, leaving the desired shape at the end. The shape achieved by CNC turning can be altered by changing the angle, pattern, and shape of the cutting tool.