SACEM1 - Thank you for telling us of your solution - unfortunately we don't have a hobber.
I can see in this instance why it helps to know a member's profile. Our business is a "Jobbing" shop in a small town (Pop 1000) four hours from a "Gear Shop". We have two Maag gear...
On a large Helix angle and wide face, we measure the axial pitch and then calculate the Helix angle. With a small Helix angle and narrow gear it is not possible to measure the axial pitch. Does anyone know a way of measuring or calculating the Helix angle?