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Warding file rectangular cross section with thin profile.
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Second cut file definition. 4 10 long. Look it up now. A file having teeth of a grade next finer than bastard. Bastard file definition a file of the commercial grade of coarseness between coarse and second cut.
In swiss pattern files the teeth are cut at a shallower angle and are graded by number with a number 1 file being coarser than a number 2 etc. Square file square cross section. Double cut top and bottom. American pattern files are available in three grades of cut.
This refers to the shape of the tiny cutting surfaces on the filea smooth file has small teeth and are continuous across the file facea second cut file will have the simple cutting edges. The tooth spacing or number of teeth per inch. It increases as the length of file is increased. For example a 6 bastard cut is a lot finer than a 12 bastard cut.
Second cut file definition is a file of a fineness between bastard and smooth. Rough file definition is a file of the grade having the coarsest cutting ridges. Bastard cut has the fewest number of teeth per inch. Double cut top and bottom.
The length of a file also affects the coarseness regardless of the cut. Bastard second cut and smooth. Second cut has more teeth per inch. Bastard second and smooth cuts.
For notching and filing in narrow spaces. Bastard second and smooth cuts. This is because shorter files are generally used for finer work.