TM 9-243
TYPES AND USES - Continued
SHARPENING STONES
Sharpening stones usually have one coarse face and
one fine face. This could combine the coarse artificial
stone with the fine natural stone. The coarse edge is
used to remove nicks and to reshape the tool being
sharpened. The fine edge is used to complete the
sharpening process and put a keen edge on the tool.
Sharpening stones are available in various shapes and
sizes, as shown.
USING A BENCH GRINDER
WARNING
WEAR EYE PROTECTION AND WATCH
THE FINGERS.
HOLD TOOLS BEING SHAPED FIRMLY,
SO THEY WILL NOT CAUSE INJURY.
CAUTION
Never use a cracked wheel. Before
using a wheel, tap it lightly with a
mallet. A ringing sound indicates
that the wheel is satisfactory; a dull
sound indicates that the wheel may
be cracked.
1 Before using, inspect the grinder and abrasive wheel,
checking for cracks or breaks on exposed surfaces.
2 Unscrew the mounting clamp (1) to allow the grinder
to be positioned on the bench.
29-3
