"Tom Miller" wrote in message
...

Anybody have any thoughts on if there are any
standards for epicycloid gears? They were
supplanted by involute profiles many years ago on
just about everything but clocks. I've found a few
web sites by Googleing , but any help will be
appreciated.

'Can't help you with standards, but there is one thing to watch for with
cycloidal gear forms: the between-axes distance of the meshing gears is part
of the equation. In other words, unlike involutes, which give you a little
slack in this department, conjugate action of cycloidal gears depends on
getting the between-centers distance of the shafts dead right. If you re-cut
or refine epicycloidal gears, thus changing their effective diameter, you
effectively change the required between-centers distance. It's tricky.

Good luck. You might have to dig into the heavy gear literature. There is a
gear society around that publishes a sort-of magazine. Check with their
editors.

--
Ed Huntress