Abstract
Noncircular gears have been generally manufactured by using cutting machines, such as hobbing machines or gear shapers fitted with special equipments. As the equipments, however, are very complicated, it is considered difficult to cut the teeth of noncircular gears ; besides accuracy is not satisfactory.In this study, to make the noncircular gears easily with satisfactory accuracy, they are first cast, and then shaved with the lathe fitted with a shaving installation. This time, two sorts of elliptic gears are made, one is with module 2, the number of teeth 51, major axis 118mm and minor axis 110mm, and the other with module 2, number of teeth 49, major axis 102mm and minor axis 95 mm. Both of these gears are made of Aluminium and Brass.
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