Abstract
The present paper describes the tooth surface temperature and the power transmission efficiency of plastic sine-curve gears in the running condition. The plastic sine-curve and involute gears were manufactured by injection molding. The running tests for sine-curve and involute gears were performed under no-lubrication and grease-lubrication conditions, and the tooth surface temperature and the power transmission efficiency were measured. Test results show that the sine-curve gears for operating condition had lower tooth surface temperatures and higher power transmission efficiencies than involute gears under no-lubrication conditions, but in the grease- lubrication condition the superiority of sine-curve gears was not observed.
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