File Filosophy
Being some Hints regarding the proper Methods of using Files and the various Applications of the most common Files

FILE FILOSOPHY Kind By kind, we mean the varied shapes or styles of files which are distinguished by certain technical names, as, for instance, Flat, Mill, Half-Round, etc. The kinds are divided, from the form of their cross sections, into three geometrical classes, namely: Quad- rangular sections, Circular sections and Triangular sections. Odd and irregular forms are collected under Miscellaneous sections. These sections are in turn sub-divided, according to their general contour or outline, into Taper and Blunt. Taper.—Designates a file the point of which is more or less reduced in size (both width and thick- ness) by a gradually narrowing section extending from one-half to two-thirds the length of the file, from the point. BLUNT. Designates a file that preserves its sec- tional shape throughout, from point to tang. Cut The cut of files is divided, with reference to the character of the teeth, into Single Cut, Double Cut, and Rasp Cut; and with reference to the coarseness of the teeth, into Rough, Coarse, Bastard, Second Cut, Smooth and Dead Smooth. Regarding the latter we may say very briefly that the coarse and bastard cuts are used upon the coarser, heavier classes of work, while the second cut and smooth are used for the finer grades and for finishing N I CH OLSON FILE CO. 31