Abstract
As the present standard of gears is specified from the view point of a processor, the accuracy grade of the standard scarcely corresponds with the performance of the gears. In this paper the way of selecting the accuracy grade of a tangential tooth-to-tooth composite error is studied on the gears which are subject only to a light load or used in the measuring instruments, and in the range in which the meshing frequency is lower than one-eighth of the natural frequency of a pair of gears. As a result, the way of selecting the accuracy grade, by which the accuracy grade corresponds well with the vibration with tooth separation of gears, is offered and made sure by some experiments. Moreover the followings are made sure, that is, the ratio 1.4 between the accuracy grades is reasonable, and the smaller division of module and of pitch diameter are better than the present division from the view point that the amplitude of the vibration with tooth separation becomes two times or one-second times as large.
