"F Murtz" wrote in message
ond.com...
...

How would you work out the module of the set for a change gear in
your hand if you do not have the cutter?

It's all in he
http://www.amazon.com/Gears-Cutting-.../dp/0852429118

You measure the outside diameter and count the teeth.

Determining the pressure angle is harder. 20 degrees is a common
standard for power transmission, the older 14.5 degree PA has hung on
for some lathe change gears. I use the drawings in catalogs to
identify it.

jsw