PRECISION MEASURING AND GAGING - OD1642 - LESSON 1/TASK 2
equipped with blade locks.
The triangular shaped gage has 51 blades
covering a wide range of pitches, including 11 1/2 and 27 threads-per-inch
for V-form threads.
(b) Screw pitch gages are used to determine the pitch of an
unknown thread by setting one of the pitch blades (one that matches the
threads) against the threads that have already been cut (figure 34, view E).
The pitch of a screw thread is the distance between the center of one tooth
to the center of the next tooth.
SCREW PITCH GAGES.