TM 9-243
USING A DRILL POINT GAGE
The method for sharpening in 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
The gaging area consists of the two parallel surfaces
(not the rounded inner portion). Sheet stock and wire
are placed in this area to determine correct size.
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 for use for a given
tap size.
16-8 Change 3
