Abstract
A scanning measurement of face milled, face hobbed, formate or generate hypoid gear is developed, and the concept of conjugate surface and composite error used in the measurement is introduced. A method of simulating tooth contact pattern and transmission error of hypoid gears based upon machine setting and actual tooth surface measurement data is discussed. The result of the simulation is compared with the experimental data, and the effectiveness of the measurement of tooth flank form of hypoid gears is discussed in a case of wear trouble experienced actual mass production gears.