Abstract
The paper presents a comparative study between wear of gears of circular-arc tooth profile having a relative radius of curvature in the axial sense of between 0.4 times and 1.4 times that in the normal plane and wear of involute helical gears based on previous investigations from a research programme carried out at Mansoura University Laboratories. The comparison revealed that wear of involute helical gears is greater than that of gears of circular-arc tooth profile for light and medium tooth loads. For heavily loaded gears, wear of cicrular-arc gears exceeds that of involute helical gears owing to an increase in hertzian deformations and their effect on the lubrication characteristics. The amount of difference in wear increases with increasing helix angle and/or decreasing oil viscosity.
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