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Putting together a project, I've found this clutch but I've never seen this type before. It has a sort of flexible plate connecting the two parts, attached to both in two places corresponding to where the four teeth are. It seems to be working but I have no idea what torque it's ok for and how much I should compress it, if at all. Sorry for the shitty photo quality. photo of the coupling

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It could either be an oldham coupling. The photo's a bit blurry. Here's a web page on oldham couplings. https://www.huco.com/products/couplings/oldham-couplings

Oldham Coupling

https://www.couplingtips.com/oldham-couplings/what-do-you-know-about-oldham-couplings/

or it could be a Flexible flange coupling

Flexible flange coupling

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  • $\begingroup$ It's definitely not the Oldham, because it has a middel disk. But the second guess is correct. $\endgroup$ – Sam Farjamirad Jul 23 '19 at 9:32
  • $\begingroup$ See also Jaw or Spider couplings, like these: google.com/… $\endgroup$ – Catalyst Jul 23 '19 at 15:46
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These drive clutches can be used to absorb drive train shocks and/or slight mis-alignments of the two shafts.

These are available in several sizes and capacities.

Flexible coupling or flexible drive coupling or flexible shaft couplings, see:

enter link description here

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