The specification of locksmith file refers to the length of file body.
The specification of special-shaped file and plastic file refers to the full length of the file.
The assembler files the body (the distance from the file tip to the file shoulder).
The full length of special-shaped files and plastic files are specifications. The basic dimensions of a file mainly include width and thickness. For circular files, diameter.
Files are divided into I ~ V numbers according to the number of main file lines per 10 mm length.
Among them, I is a coarse-toothed file hybrid, II is a medium-toothed file, III is a fine-toothed file smooth, and NO. IV and No V stands for smooth file, which is used for rough machining and finishing respectively. The diamond file has no file, but a layer of diamond powder is electroplated on the surface of the file to file hard metal.
Extended data:
Selection of file size and specification
The size and specification of the file should be selected according to the size and machining allowance of the workpiece to be machined. When the machining size is large and the allowance is large, the file with large size should be selected, otherwise, the file with small size should be selected.
4. Selection of file tooth pattern
The file tooth pattern should be selected according to the properties of the workpiece material to be filed. When filing soft materials such as aluminum, copper and low carbon steel, it is best to choose a single tooth pattern (milling tooth) file. Single-tooth file has the advantages of large rake angle, small wedge angle, large chip groove, difficult chip blocking and sharp cutting edge.
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