pic: Single Speed Gearbox Iterations

[sanddrag]

Originally Posted by JVN

Whatever gear math people are doing which says 14 is better than 12... I haven't seen it, and I like to think I've played with these numbers quite a bit.

-John

The benefit could be a better running gear mesh. I believe a 12 tooth gear has an undercut at 20 pitch and 14.5 degree pressure angle, while I think a 14 tooth is out of the range requiring the undercut geometry. That said, for typical FRC applications, I'd still go with 12 tooth gears, since they fit through the hole, as others stated. And yes, I too highly recommend a close-fitting .75" hole to locate the motor.