screw cutter (skrokut"er)

1. A hand tool or die for cutting screws. It consists of a re volvable head (into which the material to be operated on is inserted), to the interior of which cutters, adjustable by screws from the outside, are attached radially. 2. A screw-cutting machine, or one of the cutting-tools used in such a machine. screw-cutting (skrö'kut"ing), a. Used in cutting screws. - Screw-cutting chuck. See chuck4.Screw-cutting die, the cutting-tool in a screw-cutting machine; a screw-plate. E. H. Knight. - Screw-cutting gage, a gage with angles, by which the inclination of the point of the screw-cutting tool can be regulated, as well as the inclination of the tool itself, when placed in position for cutting the thread. E. H. Knight. See cut under center - gage. - Screw-cutting lathe. (a) A lathe with a slide-rest, with change-gears by which screws of different pitch may be cut. (b) Same as screw - cutting machine. Screw-cutting machine, a form of lathe for cutting screw-threads upon rods. The rod is caused to rotate against a cutting-tool while being thrust forward at a fixed rate. The pitch of the screw is determined by the relative speeds of rotation and advance of the bar, which are controlled by suitable gearing; and the size and depth of the thread are controlled by the cutting-tool employed. Also called screw - cutting lathe. screw-die (skrö'di), n. A die used for cutting screw-threads. screw-dock (skröʻdok), n. A kind of graving dock furnished with large screws to a ist in raising and lowering ve els. screw-dog (skrö'dog), n. In a lathe, etc., a clamp, adjustable by means of a screw, for holding the stuff securely in the carriage. screw-dollar (skrö'dol är), n. A medallion of which the obverse and reverse are in separate plaques which can be screwed together so as to form a very small box. Also called screw medal.