TM 9-243
USING AN EXPANSIVE BIT
NOTE
Expansive bits are available in two sizes,
one from 5/8 inch to 1-3/4 inches and the
other from 7/8 to 3 inches.
1.
Loosen retaining screw (1). Slide adjustable
blade (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 A
BRACE” steps 1 through 5, page 23-3.
CARE OF MANUAL DRILLS
Apply a light coat of oil to all metal surfaces. With a rag,
clean gear teeth of dirt, wood and metal shavings and
apply a light coat of oil. Hang manual drills on a rack or
store in a safe, dry place.
23-4
