Question

The taper of internal dovetail can be measured with the help of

Answer 1

The  Pins touch both the sides of dovetail to check the angles for an internal dovetail. Two pins which are placed for the position to touches both side of taper of the internal dovetail.

There is a distance across for the pins which is measured with time standard dimension of slip usage under the mandrel and bottom surface of a dovetail.