Lesson 4/Learning Event
Small Hole and Telescoping
a. Small hole gages, Figure 52, Part A, are adjustable, having a
rounded measuring member. A knurled screw in the end of the handle
is turned to expand the ball-shaped end in small holes and recesses.
A micrometer caliper is used to measure the ball end.
Maximum
measuring capacity is 1/2 inch.
b. Telescoping gages, Figure 52, Part B, are used to gage larger holes
and to measure inside distances. A knurled screw in the end of the
handle locks the plunger in the measuring position.
Maximum
measuring capacity is 6 inches.
As with small hole gages,
measurements must be calipered on the gage using a micrometer.
FIGURE 52.
SHALL HOLE AND TELESCOPING GAGES (PARTS A AND B)
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