TM 9-243
USING A DRILL POINT GAGE
The method for sharpening the cutting edges of a drill is
to do one lip at a time. Each lip must have the same
length and have the same angle in relation to the axis of
the drill. Set the sliding head securely on the rule at the
mark equal to the length of the drill. Place the drill
vertically against the rule so that the drill lip contacts the
59 degree angle of the sliding head. Hold up to light;
correct angle is obtained when no light is seen between
gage and drill.
USING A WIRE GAGE
Determine the size of both sheet stock and wire by using
a correct sheet and plate or wire gage.
USING A DRILL GAGE
The drill gage is used to determine the size of a drill. The
drill size, number and decimal size or letter size are
stamped on the gage beside each hole. A chart on the
gage indicates the correct size of drill to use for a given
tap size.
16-8
