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high torque and RPM flex drive; advise needed

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redshift:
An Oldham coupling should fit the bill, short in length and will take a little misalignment in all directions.
You should be able to make it yourself with all the gear you have
Regards
Dave

David Jupp:

--- Quote from: rschilp on December 04, 2012, 10:33:04 AM ---
My best design so far is a double gear with a chain. Two gears closely lined up with a doube roller chain going around both. I think that is what you are refering to here as well.

--- End quote ---

Not quite - but similar idea - 2 involute gears on common axis - rigid toothed collar around both gears, somewhere along the line the there is some modification of the tooth geometry to cope with minor mis-alignments.

75Plus:
An Oldham coupling should fit the bill as they are adaptable to most any situation if you can build your own. If you are not familiar with Oldham you can see one, with animation, here:



Joe

rschilp:
I like the oldham coupling, I even have some nice pieces of Nylon material that may make a good center disc.

How well does the oldham coupling work with a misalignment at an angle?

sebwiers:
Why not literally a flex drive?  That is, a couple (heavy!) coil springs nested one inside the next, wound in opposite directions, or other flexing material?

Another option would be a varient on a a cush drive (at least that's what I know it as, from motorcycle rear ends) ; each side would have protruding fingers that mesh together, with something like urathane bushings between them the two.

Here's a video that briefly shows what look like workable examples of both types I mentioned. 

Either type can (afaik) tolerate both angular and skew misalignment.

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