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The paper contains a new methodology to set and optimize parameters of easement curve of involute gear tooth. The methodology is based on the principles of generalized parameter method. Shape of easement curve is invariant to tool parameters. Easement curve described by elliptical equation is investigated. The methodology is recommended for optimization of gearing design with improved parameters.

The paper proposes a methodology which is recommended for plotting and analysis of involute external gearing (blocking circuit). This methodology is based on the principles of combined parameter method. As the paper states plotting and analysis of existence region in the coordinates of combined parameters αα1,2 (profile angles at tooth points) is more convenient analogue in respect of the coordinates ϑ1,2 . This paper is recommended for optimization of gearing design with improved parameters.