Besides the ordinary cutting tools in use in the workshop, such as the
chisel, gouge, plane, saw, drawknife, scissors, shears, scythe, and
others, and which do not properly belong to machine devices, there are
others, some of them mere modifications of the ordinary tools that are
sometimes needed in the design of machines, and are illustrated here.
Other appliances are--Shears: see the ordinary shearing machines,
bookbinder’s shears, No. 462, and other modifications. In some the
shears are hinged at one end, in others the movable blade moves either
with equal or unequal motion at either end by cam or crank motion (see
462.)
=454. Pipe cutter,= with ~V~-edged cutting roller. Sometimes 3 cutting
rollers are used. See No. 466.
=455. Cutting discs,= used for paper, sheet metal, &c.
=456. Slitting discs,= for cutting sheets into strips.
=457. Revolving cutter head,= for moulding, tenoning, and numerous wood
working uses.
=458. Hollow revolving cutter head,= for rounding wood rods, broom
handles, &c. See also No. 488.
=459. Reaping machine cutters.= A series of scissor-shaped knives, one
set fixed and the other reciprocating.
=460. Wire cutter discs,= one fixed, the other attached to the hand
lever, and having corresponding holes of various sizes in both discs.
=461. Chaff machine,= with revolving shear blades.
=462. Guillotine shears.=
=463. Milling cutters.=
=464. Tubular machine cutter= for wood working; easily sharpened, and
can be revolved to present fresh cutting edges to the work.
[Illustration: 446.-464.]
=465. Fret saw= or jigger.
=466. Three-cutter tube shears,= with worm gear motion.