Posted by Michael Ignat on February 26, 2005 at 17:35:26:
In Reply to: Question about cutting helical gears posted by ROBERT on February 25, 2005 at 18:35:45:
A helical gear is similar to a thread; the lead (axial pitch x number of teeth) is constant, which generates different helix angles at different diameters, all following the formula:
Lead= pi * Dia /tan(HelixAngleAtThatDia)