ABSTRACT
This chapter analyses of areas of existence of asymmetric tooth gears and defines parameter limits for a pair of spur gears or helical gears in the transverse section. It describes the areas of existence of an asymmetric tooth gear pair are defined and analyzed considering a backlash and all tolerances equal to zero. There are many other isograms that can be drawn in the area of existence. The shaded parts of the area of existence contain all reversible interference and tooth root undercut free gear pair options. There are minimal numbers of the gear pair teeth when an area of existence of such asymmetric gears becomes very small. The areas of existence were developed for only research purposes to learn more about capabilities and limitations of involute macrogeometry, specifically of asymmetric tooth gears that are not so systematically explored in comparison to symmetric tooth gears.
