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

FILE FILOSOPHY the teeth, (sometimes exceeding mostly applied to the backs of half-rounds and to the edges of quad- rangular sections. MIDDLE Cut.—A term used to designate the cut of a file when it is of a grade of coarseness between the rough and bastard. It is but little used in this country. OVER Cut.—A term used to describe the first series of teeth on a double cut file. RE-CUT OR RE-CUTTING.—The working over of old or worn out files by the several processes of annealing, grinding out the old teeth, re-cutting, hardening, etc., and thus again preparing them for use. This operation is sometimes repeated two and even three times, but the economy of re-cutting at all is very much questioned, and the practice is done away with in most of the best appointed shops of the present day. SAFE Edge (Or Side).—Terms used to denote that a file has one or more of its edges or sides smooth or uncut, that it may be presented to the work without injury to that portion which does not require to be filed. SCRAPING.—As applied in machine shops, the process consists of removing an exceedingly small portion of the wearing surfaces of machinery by means of scrapers, in order to bring these surfaces to a precision and nicety of finish (as determined by the straight edge or surface plate) not attainable by the file or by any other means with which we are acquainted. NICHOLSON FILE CO. 10