A Comparison between a Classical and a Modified Root Fillet

Abstract The main purpose of this paper consists in improving the rigidity gear tooth by applying various root fillet forms that differ from classical 0.38m radius circle arc. During research necessity re-formulation undercut appeared. It appears much later case rounded addendum edge planing comb as using a classic generating profile tool. Therefore, limits shifting can be significantly extended without weakening dedendum. presents stress repartitions under equal load, which occur on teeth, and teeth having modified fillet. In last case, is envelope curve family constituted curves, relative motion related to cut gear.