T(SK):JT is the naming code for the 7/24 taper shank of the national standard GB/T10944.1-1983 (now revised to the 2006 version) formulated by ISO7388-1:1983, which is derived from the German standard DIN69871 -1, named SK in Germany, but the ISO standard only stipulates three specifications: 40, 45, and 50. Its appearance characteristics are that the flange is thin, and the flange thickness of each specification is 15.9mm; the V-shaped grooves are symmetrically distributed; the depth of the keyway at both ends is asymmetrical, which can avoid errors in the position of the tool tip when installing the tool; in the shallower There is also a positioning groove on one side of the end keyway to facilitate the correct installation of the tool in the tool magazine.
Common vertical milling machine tool holder models are: The tool holder models of vertical milling machines are usually divided into two types. One is a straight shank type milling cutter, usually with a straight shank milling cutter with a diameter of less than 20 mm. The other is the Morse taper shank milling cutter model, which is divided into three types of Morse tapers. The tool shank taper is usually equipped with the diameter of the tool, usually 12 mm in diameter - 50 mm milling cutter size uses three Morse tapers. model.
The structural forms of CNC machine tool tool holders are divided into two types: integral type and modular type. The working part of the integral tool holder for clamping the tool is integrated with the shank used for installation and positioning on the machine tool. This kind of tool holder has poor adaptability to changes in machine tools and parts. In order to adapt to the change of parts and machine tools, users must stock tool holders of various specifications, so the utilization rate of tool holders is low. The modular tool system is a more advanced tool system. Each tool holder of an ordinary milling machine can be assembled through various series of modules. For different processing parts and machine tools, different assembly solutions are adopted to obtain a variety of tool holder series, thereby improving the adaptability and utilization rate of the tool holder.