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 middle
finger, clockwise to screw in, counterclockwise to
unscrew.
CARE OF SCREWDRIVERS
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 handle or rounded tip.
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.
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.
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 not use a screwdriver as a chisel.
22-8
