The quick changing tool post is a major spare part of  lathe.It is composed of cutter-cartridge body and tool holders for various cutting tools wihch can replace the square tools table for processing works such as cylindrical facing,end facing,cutting,knurling,drilling,enlarge-boring and reaming, etc.The height of tools can be regulated adn positioned relative to  the center line of machine spindle.It features external tool mounting,tool matching,quick tool changing (within 3 to 5 seconds),great precision in positioning and great hardness ,etc.