Abstract

The limiting loads for scoring of three kinds of hypoid gears, which have different dimensions and are produced by different methods, are tested and compared with each other. Then the effects of surface treatments on the limiting loads for scoring of hypoid gears were tested and compared with the results of spur gears and roller tests. From the test results, it was made clear that the contact conditions of the test surfaces affect the limiting load for scoring. Further the frictional losses of hypoid gears were measured. The results show that the coefficient of friction of hypoid gears does not change by the kind of hypoid gears, but it depends upon their sliding velocities, and their empirical formula was obtained.

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