USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
(2) Inside Calipers.
The inside caliper is set to a dimension by
placing the end of a scale and one point of the caliper against a solid
surface and adjusting the other leg to the proper graduation, as shown in
figure 181, view A, on the previous page. The spring caliper is shown being
used to check the inside diameter of a bored hole in figure 181, view B.
Figure 182 illustrates the correct and incorrect positioning of the calipers
with relation to the axis of the work.
The transfer feature of the caliper is illustrated in figure 183 on the
following page. Note that the diameter being measured is recessed and that
the setting cannot be transferred to a scale directly because the legs must
be collapsed to get them out of the work. The setting must be reproduced
after the calipers are removed. Figure 184 on the following page shows how
a micrometer can be used to transfer a dimension from an inside spring
caliper.
FIGURE 182.
POSITIONING OF INSIDE CALIPERS.
(3) Hermaphrodite Calipers.
The hermaphrodite caliper is adjusted
and set in the same manner as the outside and inside caliper, depending on
the position and intended use of the caliper leg, as shown in figure 185 on
page 235.
(4) Trammel.
The trammel set is used for the same purposes as a
divider or caliper, but usually for distances beyond the range of either
one.
233
Previous Page
