Hi,

I am looking to make a custom helical pinion and bevel gear for a differential model, and the method that I tried using the twist seemingly worked for the bevel gear, but it becomes clear in the pinion gear that it won't work. It made the teeth very thin, when I want the cut face to stay the same but just at an angle to the other cut face. 

Is there a way to do a circular sketch pattern on an uneven surface, or any other ideas to fix it would be appreciated.