Broaching is a specific type of milling involving a toothed cutting tool for precision machining of odd shapes like holes, splines, and keyways. Broaching can be used to enlarge, shape, or smooth a bored or drilled hole, and to remove material between two adjacent drilled holes. For example, a round hole can be broached to a square or other shape.

DRILLING

The drilling process produces cylindrical holes of various sizes into parts.