Abstract
The purpose of this research is to derive the meaningful parameters and the new procedure of measurement of tooth flank topography to evaluate the individual gear accuracy objectively. For this purpose, the tooth flank topography is characterized as the curved surface and the parameters for tooth flank topography are derived from the 3-dimensional measured deviations of tooth flanks. For the first step, a new definition of the pitch deviation is proposed. The pitch deviation is calculated with multiple deviations of a tooth flank. According to this new definition, a pitch error should be expressed by the angle, not by the length, and it can be calculated from the measured conventional deviations. Actual gear flanks of a bevel gear are measured with the new measuring procedure and the new pitch deviation is calculated.
