'slitting file' definitions:

Definition of 'slitting file'

From: GCIDE

slitting \slit"ting\ (sl[i^]t"t[i^]ng), a. & n. from slit. [1913 Webster]
slitting file. See Illust. (i) of sile.
slitting mill. (a) A mill where iron bars or plates are slit into narrow strips, as nail rods, and the like. (b) A machine used by lapidaries for slicing stones, usually by means of a revolving disk, called a slicer, supplied with diamond powder.
slitting roller, one of a pair of rollers furnished with ribs entering between similar ribs in the other roller, and cutting like shears, -- used in slitting metals. [1913 Webster]