Direct Gear Design has been developed for involute gears and is based on the Theory of Generalized Parameters, (Gears with improved characteristics, E.B. Vulgakov, Mashinostroenie, Moscow, 1974.) ...

The KISSsoft 08/2005 package is a better option. The basic module handles spur and helical gears. Other modules provide a complete tool for sizing, optimizing, and rating entire gearboxes. The ...