USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
SMALL HOLE AND TELESCOPING GAGES.
THREAD CUTTING TOOL GAGES.
f. Types of Thread Cutting Tool Gages.
Thread cutting tool gages
(figure 201) are hardened steel plates with cutouts around the perimeter.
Each cutout is marked with a number that represents the number of threads
per inch. A 29 angle, included with each gage, is used to set the thread
cutting tool. One gage is used for Acme standard threads and the other for
square cut threads.