A machine tool that mainly uses a drill to machine holes in a workpiece. Usually the rotation of the drill bit is the main movement, and the axial movement of the drill bit is the feed movement. The drilling machine has a simple structure, can drill through holes and blind holes, replace special tools, and can expand, countersink, ream or tap. The workpiece does not move during machining, the tool is moved, the center of the tool is aligned with the center of the hole, and the tool is rotated (main motion).