Abstract
Gears with a different tooth profile from an involute curve might be effective for the reduction of energy loss in the running condition Sine-curve gears, of which teeth surfaces are formed using a sine-curve rack, have smaller sliding between tooth flanks than involute gears. The present paper describes the tooth surface temperature and the power transmission efficiency of plastic sine-curve gears The running tests for sine-curve gears and involute gears were performed under various running conditions. Test results showed that the power transmission efficiency of a sine-curve gear is higher than that of involute gears.
