Posted by frank on April 15, 2014 at 06:34:41:
In Reply to: re posted by ak on April 14, 2014 at 10:39:41:
with this instrument on the largest of the tooth:
http://chestofbooks.com/home-improvement/workshop/Machine-Shop-Work/images/Fig-280-Gear-Tooth-Caliper-in-Use.jpg