pic: Dual FP gearbox

[JVN]

Originally Posted by CraigHickman

Those distances added to the center to centers all depend on your plate material, stiffness, machining capabilities, and so on. The team I've worked with has always been fortunate enough to work with a machine shop that could hold true to .0001, so we never really saw a need to design around the machining equipment.

What will these be machined on? If you find what tolerances they hold, it'll be easier to identify what spacing you need.

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