The structure of various tools consists of a clamping part and a working part. The clamping part and working part of the overall structure tool are made on the cutter body; The working part of the toothed tool (tooth or blade) is mounted on the cutter body.

The clamping part of the tool has two types: with holes and with shanks. The tool with holes relies on the inner hole set on the spindle or mandrel of the machine tool to transmit torsional torque with the help of axial keys or face keys, such as cylindrical milling cutters, sleeve face milling cutters, etc.

Tools with shanks usually have three types: rectangular shank, cylindrical shank and conical shank. Turning tools, planers, etc. are generally rectangular shanks: the tapered shank bears the axial thrust by the taper, and transmits torque with the help of friction; Cylindrical shanks are generally suitable for smaller twist drills, end mills and other tools, and the torsional moment is transmitted by the friction generated during clamping during cutting. Many tools with shanks have shanks made of low-alloy steel, while the working part is welded with high-speed steel.

tool is the part that generates and processes chips, including the cutting edge, the structure that breaks or rolls the chips, the space for chip removal or storage of chips, the channel of cutting fluid and other structural elements. The working part of some tools is the cutting part, such as turning tools, planing tools, boring cutters and milling cutters; The working part of some tools includes cutting parts and calibration parts, such as drills, reaming drills, reamers, inner surface broaches and taps. The function of the cutting part is to cut the chips with the cutting edge, and the function of the calibration part is to polish the machined surface that has been cut and guide the tool.