pic: Single Stage Ballshifter

[s_forbes]

Originally Posted by jkelleyrtp

Edit: Did not realize a description had been posted. Your teeth count does not line up 71 vs 72, is that okay to use?

Vexpro sells a pinion gear that has 11 teeth, but the profile is set up so that it is used as a 12 tooth gear (as far as spacing between shafts is concerned).

One thing that I would double check with this kind of design is that the motors are spaced around the shifting shaft in a way that prevents the pinions from over constraining the shifting gears and binding. With the shifting gears being 54 and 60 teeth (both divisible by 3) I don't think there would be an issue with the motors being spaced evenly around the gearbox, but it doesn't look from the render like they are spaced that way.