Abstract

This research aims at developing a new lapping process which can make efficiently tooth flanks of hardened steel gears smooth as a mirror. The lapping process is carried out using a nylon helical gear and a simple mechanical device. This paper shows causes of increases of tooth profile errors in this lapping and proposes how to prevent them according to results of lapping tests with many ground high-precision gears under various conditions. It is concluded that it is important to carry out the lapping for a short time using a nylon gear which has a large helix angle and high-teeth under a condition of high-speed revolution and light load in order to prevent increases of tooth profile errors.

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