Abstract
This paper describes development of a constitution that satisfies manifold needs for the designing system of profile shifted involute internal gears and also a simple, effective optimization technique (influence index number method) that can be applied to particularly complex programming such as required for designing of gears. The previous paper presented the system and technique for profile shifted involute crossed helical gears. This paper deals with internal gears. Internal gears are specifically subject to numbers of interference, which produces increased complication to the effect of designing variables. Especially adequate consideration is, therefore, required. The system and technique developed were fully tested by extensive actual design computation and trial manufacture of an example of gears designed by the present method. The test confirmed that this designing system and simple technique were also very effective for designing of internal gears.