This is a machine tool that mainly uses a boring cutter to boring existing prefabricated holes in the workpiece. In general, the rotation of the boring cutter is the main motion, and the movement of the boring cutter or workpiece is the feed motion. It is mainly used for machining high-precision holes or finishing multiple holes at one positioning, and can also be engaged in the processing of other machined surfaces related to hole finishing. Drilling, milling, and cutting can also be carried out with different tools and attachments with higher machining accuracy and surface quality than with drilling machines. The boring machine is the main equipment for the processing of large box parts. Threading and machining of cylindrical and end faces, etc.