USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
side of the caliper in lieu of a scale used for inside measurements.
In
such cases, add the thickness of the nibs to the reading when making inside
measurements. The tips of the jaws are formed so that inside measurements
can be taken.
The thickness of the measuring points is automatically
compensated for on the inside scale. The length of the jaws will range from
1 1/4 inches to 3 1/2 inches, and the minimum inside measurement with the
smallest caliper is 1/4 inch or 6 millimeters. Vernier calipers are made in
standard sizes of 6, 12, 23, 36, and 48 inches, and 150, 300, 600, and 900
millimeters.
The jaws of all Vernier calipers, except the larger sizes,
have two center points, which are particularly useful in setting dividers to
exact dimensions.
FIGURE 178.
CALIPERS - CALIBRATED.
(7) Slide Calipers. The slide calipers (figure 178) have one fixed
jaw and one sliding jaw.
When the two jaws are brought in contact with
surfaces to be measured, the distance between the surfaces may be read from
the scale.
The ends of the jaws are so shaped that it is possible to
measure both inside and outside surfaces. Slide calipers are
229
Previous Page
