Abstract
The hypoid-gear having great freedom of design has high possibilities of performance. The author has developed the assistant software for design and manufacturing to derive them. This paper describes it's utility to grasp the basic performance in the design stage. Moreover it presents the analysis of lapping process, which is very important to make gears of quiet operation, for the gears cut by a small cutter. The predominance of swing method lapping toward the EP method lapping is suggested.
