I am finding different opinion, but I can not find a mathematical demonstration about this topic. for example here is described as non homokinetic: Oldham coupling vs Universal joint
here is homokinetic: Book
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Sign up to join this communityI am finding different opinion, but I can not find a mathematical demonstration about this topic. for example here is described as non homokinetic: Oldham coupling vs Universal joint
here is homokinetic: Book
It's kinda trivial, the middle disk is homokinetically and rotationally coupled to the outer disks. Because the slot and tab in the connections are always parallel (not counting play in the fit).