Abstract
The effects of tooth form error on the stresses of helical gears are less clarified than those with spur gears. In this study, the tooth fillet stress of helical gears with convex or concave tooth profile is measured, and the effects of tooth form error on the stress are investigated by comparing with an analysis of power transmitting characteristics of cylindrical gears, which has been developed before. As a result, it is confirmed that the theoretical analysis is valid, and it makes the theoretical calculation of tooth contact stress and flash temperature more reliable. From these considerations, it is verified that the concave tooth profile is undesirable for tooth fillet stress, contact stress and flash temperature.
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