society > occupation and work > equipment > machine tool > other specific machine tools > [noun] > machine for cutting screw-threads > tools (3)
a tool used for cutting the thread of a screw, typically having a toothed edge which is pressed against the object as it is turned on a lathe.
A tool used for cutting the threads of screws.
(Also hub.) ‘A hardened, threaded spindle, by which a comb or chasing-tool may be cut’ (E. H. Knight Pract. Dict. Mech.). Also: a master tap.