Special purpose pliers.
(2) Use of pliers. When using pliers, keep your fingers away from the jaws
and cutting edges. Make sure the hinge or joint is tight before using pliers.
Insulate handles of pliers when using them in electrical work with several
thicknesses of friction tape, rubber tape, or specially manufactured rubber grips.
When cutting large material within the capacity of diagonal cutting pliers, cut
with the throat of the jaws, not with the points. The tendency of misalining the
jaws will be greatly reduced. Once the jaws are misalined (sprung), it will be
impossible to cut fine wire. To preserve the life of slip joint combination
pliers, do not use them on very hard metal. Hard metal will wear off the teeth and
the pliers will lose their grip. Use pliers only for the purpose for which they
are intended. Do not try to increase the leverage of their handles by lengthening
them with sections of pipe or other extensions.
Vises are used for holding work when it is being planed, sawed,
drilled, shaped, sharpened, riveted, or when wood is being glued.
(1) Types of vises.
(a) Machinist's bench vise. A machinist's bench vise (fig 30) is a large
steel vise with rough jaws that prevent the work from slipping. Most of these
vises have a swivel base with jaws that can be rotated, while others cannot be
rotated. A similar light-duty model is equipped with a cutoff. These vises are
usually bolt-mounted onto a bench.
(b) Bench and pipe vise. The bench and pipe vise (fig 30) has integral
pipe jaws for holding pipe from 3/4 inch to 3 inches in diameter. The maximum
working main jaw opening is usually 5 inches, having a jaw width of 4 to 5 inches.
The base can be swiveled to any position and locked. These vises are equipped with
an anvil and are also bolted onto a workbench.
(c) Clamp base bench vises. The clamp base bench vise (fig 30) usually
has a smaller holding capacity than the machinist's or bench and pipe vises and is
clamped to the edge of a bench. Holding capacity is generally 1-1/2 to 3 inches.
These vises normally do not have pipe holding jaws.