Saw-fil′ing ma-chine′.
One for sharpening the teeth of saws. See also saw-sharpening. The teeth of saws are usually made by a punching action in a saw-toothing machine. The example (Fig. 4602) has a suspended frame B on which the file and operative mechanism are arranged. The axis of suspension is also the arbor of the countershaft pulley, connecting by belt with the driving-pulley F. The vertical shaft I is rotated by bevel-gearing G H, operating the pitman p and crosshead q, and reciprocating the file-carrier. The saw is temporarily placed on a mandrel on the bench. Fig. 4603 comprises a standard a having a pulley from which a belt passes to a pulley on the movable frame c, attached by a ball and socket joint to the main frame d. The pulley-shaft carries the grinding-wheel b, which, by means of a handle, may be presented to the work at any desired angle. It is driven at the rate of 1,500 to 2,000 revolutions per minute, and is counterpoised by a weighted lever e, so as to be manipulated by a slight pressure. See “Art of saw-filing” (56 pp.), John Wiley, New York. [2037]Saw-filing machine. |
Saw-filing machine. |