USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
USING FILLET AND RADIUS GAGES.
p. Use of Drill Point Gage. The method of sharpening the cutting edges
of a drill is to do one lip at a time. Each lip must have the same length
and 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 angle of the sliding head. Hold up to the light; the correct angle
is obtained when no light is seen between the gage and the drill.
q. Use of Marking Gages. A marking gage must be adjusted by setting
the head the desired distance from the spur. Although the bar of a marking
gage is graduated in inches, the spur may work loose or bend.
occurs, accurate measurement with a rule should be made between the head and
spur (figure 213, view A, on the following page).
To draw a line after
setting the gage, grasp the head with the palm and fingers (figure 213, view
B); extend the thumb along the beam towards the spur.