Form milling is a milling process that involves specifically shaped cutters to produce features with special geometries. Form milling tools can produce complex contours like curves, arcs, and other nonconventional shapes. The figure below, for example, shows a form milling cutter with a round outline, capable of producing an arced cavity inside the workpiece.
A common application of form milling is in mold making and tooling, where engineers design their own form milling cutters to cut custom geometric profiles in mold and die stocks.
