ability to provide very accurate measurements
over a large range. It can be used for both
clearly indicated. The most commonly used
internal and external surfaces. To use the vernier
caliper, you must be able to measure with a slide
the nearest 1/1,000th of an inch, but if you need
caliper and read a vernier scale.
to measure to the nearest 1/10,000th of an inch,
you can use a vernier micrometer caliper. The
measurement is usually expressed or written as a
decimal; so you must know the method of writing
In much wider use than the vernier caliper is
the micrometer caliper, commonly called the
Types of Micrometers
"mike." A person who is working with machinery
or in a machine shop must thoroughly understand
the mechanical principles, construction, use, and
most commonly used throughout the Navy: the
care of the micrometer. Figure 3-19 shows an
outside micrometer caliper (including the screw
Figure 3-18.--Vernier caliper.
Figure 3-19.--Nomenclature of an outside micrometer caliper.