The modification of tooth profile can effectively decrease the impact

vibration

and noise

increase the load carrying capacity in gearing. Many kinds of methods of modificationhave been put forward in order to alleviate the stiffness fluctuation in gear engagement cycle and improve load distribution. From the viewpoint of improving the EHL conditions between gear teeth

with diagonal modification as an example

modification parameters are cptimized so that the optimum EHL effect can be achieved.