TM 9-243
USING SCREWDRIVERS - Continued
USING A JEWELER’S SCREWDRIVER
1 Hold screwdriver as shown, with forefinger on
rotating head (1).
CAUTION
Be sure the screwdriver fits the screw. If
the screw is too large for the screwdriver
tip, the tip will be damaged.
2 Insert the tip of the screwdriver in the screw slot (2).
Turn the screwdriver, between the thumb and mid-
dle finger, clockwise to screw in, counterclockwise
to unscrew.
CARE OF SCREWDRIVERS
handle or rounded tip.
not use a screwdriver as a chisel.
4.
After use, wipe screwdriver clean and place in rack
or tool box. For long-term storage, apply rust-
preventive compound to all metal surfaces and
store in a dry place.
6.
A poor fitting screwdriver will damage the screw
head, slip off the screw, and cause personal injury.
Use a screwdriver that has parallel sides and
exactly fits the screw slot.
7.
Never pound on a screwdriver with a hammer. Do
5.
Screwdrivers used in the shop are best stored in a
rack. This way the proper selection of the right
screwdriver can be quickly made and fewer injuries
will result.
1.
When a screwdriver becomes nicked, or the edges
become rounded, or when other damage occurs so
that it does not fit a screw slot, it can be reground or
filed. The sides must be parallel to keep the tool
from lifting from the screw slot and the tip must be
square, at right angles to the sides and to the blade.
2.
Do not expose a screwdriver to excessive heat, as it
may reduce the hardness of the blade.
3.
Replace a screwdriver that has a worn or damaged
TIP SIDES ARE
GROUND PARALLEL
TIP SIDES ARE
TIP SIDES ARE
GROUND TO SHAPE OF
GROUND AT AN
GRINDING WHEEL
ANGLE
RIGHT
RIGHT
WRONG
22-8
