pic: Dual FP gearbox

Originally Posted by JVN

I always design with an additional 0.003" between axle centers. This has absolutely nothing to do with machine tolerances, but instead with gearbox efficiency.

They run a lot better if you run them a little loose...

I think designing them at "pitch circle + .003" is a pretty good bench mark. Should be fine.

-John

Listen to John instead of me. He's a real Engineer, and knows a TON more than I do.

(out of curiosity, how is there more efficiency from more space? I'm visualizing the rounded tooth profile rolling across another tooth, and not seeing how more space can help this. Care to clarify?)