Lesson 4/Learning Event
Fillet and Radius
These gages are used to check convex and concave radii in corners or against
These gages are used to check the accuracy of drill cutting edges after
grinding. They are also equipped with a 6-inch hook rule. This tool can be
used as a drill point gage, hook rule, plain rule, and a slide caliper for
taking outside measurements.
TYPES OF GAGES
Thickness (feeler) gages are made in many shapes and sizes. Usually 2 to 26
blades are grouped into a single tool and graduated in thousandths of an
inch. Most thickness blades are straight. Others are bent at the end at
45-degree and 90-degree angles.
Some thickness gages are grouped so that
there are several short and several long blades together. Thickness gages
are also available in single blades and in strip form for specific
measurements. For convenience, many groups of thickness gages are equipped
with a locking screw in the case. This screw locks the blade to be used in
the extended position.
Figure 49 shows several types of thickness gages
available through the Army Supply System.
THICKNESS FEELER GAGES