Figure 1-30.-Filing operations.
MILL files are tapered in both width and
width and thickness. HARD files, not shown, are
thickness. One edge has no teeth and is known as a
somewhat thicker than flat files. They taper slightly
SAFE EDGE. Mill tiles are used for smoothing lathe
in thickness, but their edges are parallel.
work, drawfiling, and other fine, precision work. Mill
files are always single-cut.
The flat or hard fibs most often used are the
double-cut for rough work and the single-cut smooth
FLAT files are general-purpose files and may be
file for finish work.
either single- or double-cut.
They are tapered in