(b) 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 (A, fig 52). The spring caliper
is shown being used to check the inside diameter of a bored hole (B, fig 52).
Figure 53 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 54. Note that the diameter being used 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 55 shows how a micrometer can be used to transfer a
dimension from an inside spring caliper.
Figure 53.
Positioning of inside calipers.
Figure 52.
Setting and using inside caliper.
Figure 54.
Using a transfer caliper to
measure a recessed diameter.
Figure 55.
Transferring dimension to
44
Previous Page
