I'm trying to design mechanism similar to this video https://www.youtube.com/watch?v=t1JNWnTpmkA where i have concentric rings that spin within them selves around x, y and z axis.(adsbygoogle = window.adsbygoogle || []).push({});

I intend to use track roller cam follower bearings to support each ring, with a bearing width of 10mm and a diameter of 12mm. Now what i'm trying to calculate is the depth of the track that would allow a smooth rotation for the bearings. To simplify things i am looking at each nested ring as an solid axle spining at its centre.

Is there an equation to calculate the track depth?

Thanks

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# Design help -- concentric rings that spin within themselves

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