G
ENERAL
INFORMATI ON
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will accept either type); this can damage the head so that
the proper tool will be unable to remove it.
8. Keep screwdrivers in the proper condition, and they
will last longer and
perform better. Always keep the tip of
a standard screwdriver in good condition.
Figur
e 19
shows how to grind the tip to the proper shape
if
it be-
comes damaged. Note the symmetrical sides
of
the tip.
Pliers
Identify them by painting the screwdriver
shank underneath the handle.
4. When selecting screwdrivers, note that more power
can be applied with less effort with a longer screwdriver
than with a short one. Of course, there
will be situations
where only a short handle screwdriver can be used. Keep
this in m
ind
though,
when
trying to re
move
tight
screws
.
5. Because the working end
of
a screwdriver receives
quite a bit
of
abuse, you should purchase screwdrivers
with hardened tips. The extra money
will be well spent.
6. Screwdrivers are available in sets, which often include
an assortment
of
commo
n and Phillips blades.
If
purchas-
ing them individually, buy at least the following:
a. Common screwdriver
-5/16
x 6 in. blade.
b. Common screwdriver
-3/8
x 12 in. blade.
c. Phillips screwdriver
-size
2 tip. 6 in. blade.
d. Phillips screwdriver
-size
3 tip. 6 and 8 in. blade.
7. Use screwdrivers only for driving screws. Never usc a
screwdriverfor prying or chiseling metal. Do not
try
to rc-
move a Phillips, Torx or Allen head screw with a standard
screwdriver (unless the screw has a combination head that
Pliers come in a wide range
of
types and sizes. Pliers are
useful for cutting, bending and crimping. They should
never be used to cut hardened objects or to
turn bolts or
nuts.
figure
20 shows several types
of
pliers.
Each type
of
pliers has a specialized function. Combi-
nation pliers are general-purpose pliers and are used
mainly for holding and for bending.
Necdlenose
pliers are
used to hold or bend small objects. Adjustable pliers
(commonly referred to as channel locks) can be adjusted
to hold various sizes
of
objects; the jaws remain parallel to
grip around objects such as pipe or tubing.
Locking Pliers
Locking pliers (Figure
21) are used to hold objects veIY
tightly while another task is performed on the object.
Locking pliers are available in many types for more spe-
cific tasks.
Circlip Pli
ers
Circlip pliers (Fig
ure
22) are used to remove circlips
from shafts or within engine or suspension housings.
When purchasingcirclip pliers, there are two types. Exter-
nal pliers (spreading) are used to remove circlips that fit
on the outside
of
a shaft. Internal pliers (squeezing) are
used to remove circlips that fit inside a housing.
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