The main difference between the vertical milling machine and the horizontal milling machine is that the spindle is vertically arranged. Besides the different spindle arrangement, the table can be moved up and down. The milling cutter used in the vertical milling machine is relatively flexible and has a wide range of application. End mills, chucks, drills, etc. can be used. Millable keyways, double-sided milling machines, <milling planes, counterbores, and the like. The horizontal milling machine can also use the above tools, but it is not as easy as milling. It is mainly used to enhance the strength of the tool (mainly the three-blade cutter and the lamellar cutter). Can be slotted, milled plane, cut off and so on. The horizontal milling machine generally has a vertical milling head. Although this vertical milling head is not as powerful and rigid as a vertical milling machine, it is sufficient for end mill machining. This makes the horizontal milling machine more powerful than the vertical milling machine. Vertical milling machines do not have this feature and cannot machine workpieces suitable for horizontal milling. The productivity is higher than that of the horizontal milling machine.