USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
FIGURE 174.
USING KEY SEAT CLAMPS, RULE, AND SCRIBER.
5.
Calipers and Dividers
a. Purpose.
Dividers are used for measuring distances between two
points, for transferring or comparing measurements directly from a rule, or
for scribing an arc, radius, or circle.
Calipers are used for measuring
diameters and distances, or for comparing dimensions or sizes with
standards, such as a graduated rule.
b. Types of Calipers and Dividers.
(1) Dividers.
(a) Spring Divider. A spring divider (figure 175 on the following
page) consists of two sharp points at the end of straight legs, held apart
by a spring and adjusted by means of a screw and nut. The spring divider is
available in sizes from 3 to 10 inches in length.
(b) Wing Divider.
A wing type divider (figure 175) has a steel
bar that separates the legs, a locking nut for securing a rough measurement,
and an adjusting screw for fine adjustments.
The wing-type divider is
available in 6, 8, and 12 inch lengths. An improved version of this type
has the tip of one leg removable so that a pencil can be inserted.
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