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 shar-
pening process and put a keen edge on the tool. Shar-
pening 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 CATCH IN ABRA-
SIVE WHEEL AND CAUSE INJURY.
CAUTION
Never use a cracked wheel. Before using
a wheel, tap it lightly with a mallet. A ring-
ing 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
