Milling machine | CNC, Metalworking Machining | Britannica
milling machine, device that rotates a circular tool that has a number of cutting edges symmetrically arranged about its axis; the workpiece is commonly held in a vise or similar device clamped to a table that can move in three perpendicular directions. Disk or barrelshaped cutters are clamped through holes in their centres to arbors (shafts) attached to the machine spindle; they have teeth ...