Abstract
The influence of gear eccentricity is investigated under no load. Transmission errors including radial eccentricities and cumulative pitch deviations of a pair of spur gear are measured. Several amounts of eccentricity and phase difference of the gear pair are identified by independent measurement. It is clarified that the maximum peak-to-valley values of transmission error curves during whole period of engagement are almost proportional to the sum of the amount or eccentricities in the case of a gear pair, which has the number of teeth relatively prime. In addition, it is essential that cumulative pitch deviations must be included as the components of composite vectors of eccentricity to investigate transmission errors with eccentricities in high accuracy.
