TM 9-243TYPES AND USES - ContinuedSHARPENING STONESSharpening stones usually have one coarse face andone fine face. This could combine the coarse artificialstone with the fine natural stone. The coarse edge isused to remove nicks and to reshape the tool beingsharpened. 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 andsizes, as shown.USING A BENCH GRINDERWARNINGWEAR EYE PROTECTION AND WATCHTHE FINGERS.HOLD TOOLS BEING SHAPED FIRMLY,SO THEY WILL NOT CATCH IN ABRA-SIVE WHEEL AND CAUSE INJURY.CAUTIONNever use a cracked wheel. Before usinga wheel, tap it lightly with a mallet. A ring-ing sound indicates that the wheel issatisfactory; a dull sound indicates thatthe wheel may be cracked.1 Before using, inspect the grinder and abrasivewheel, checking for cracks or breaks on exposedsurfaces.2 Unscrew the mounting clamp (1) to allow the grinderto be positioned on the bench.29-3
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