TM 9-243USING AN EXPANSIVE BITNOTEExpansive bits are available in two sizes,one from 5/8 inch to 1-3/4 inches and theother from 7/8 to 3 inches.1.Loosen retaining screw (1). Slide adjustableblade (2) to the desired width using built-in scale (3)or a 6-inch machinist’s rule.2.Tighten retaining screw (1) and refer to “USING ABRACE” steps 1 through 5, page 23-3.CARE OF MANUAL DRILLSApply a light coat of oil to all metal surfaces. With a rag,clean gear teeth of dirt, wood and metal shavings andapply a light coat of oil. Hang manual drills on a rack orstore in a safe, dry place.23-4
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