On 1/21/2017 6:31 PM, Ned Simmons wrote:
Forgot to mention: You can generate a rack by rolling your gear thru a
lump of clay. Measure the teeth of the clay rack.

I had read that on some forum and had tried it - the clay stuck to the
gear and generally was very uncooperative. I thought I might try using
epoxy putty in its almost-set state, but never got around to it.

Also, the teeth are so small that I don't think that I could have
measured the angles very well.