USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
gages are made of hard rolled steel.
The double ended blades of gage
(figure 202, view A) have a lock which holds the blades in position. The
inside and outside of the same radii are on one blade.
The other gage
(figure 202, view B) has separate blades for inside and outside
measurements. Each blade of each gage is marked in 64ths. Gage A, figure
202, has a range of sizes from 17/64 to 1/2 inch. Gage B, figure 202, has a
range of sizes from 1/32 to 17/64 inch. Each gage has 16 blades.
FILLET AND RADIUS GAGES.
h. Types of Drill Point Gages. The drill point gage (figure 203 on the
following page) consists of a 6 inch hook rule with a 59 head that slides
up and down the rule. The sliding head can be locked at any position on the
rule. The sliding head is graduated in 1/32 inch.
i. Types of Marking Gages. Marking gages (figure 204 on the following
page) are made of wood or steel. They consist of a graduated beam about 8
inches long, on which a head slides. The head can be fastened at any point
on the beam by means of a thumbscrew. The thumbscrew presses a brass shoe
tightly against the beam and locks it firmly in position. A steel pin or
spur marks the wood. The spur projects from the beam about 1/16 inch.