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[Edit 1]: Added material of components.

I have a flywheel with a shaft connected to it. The shaft rotates with the flywheel, but also rotates relative to it, to give me a kind of camshaft motion if you can imagine. I don't know why type of pin is best to use here, I've only pinned things that don't move relative to each other in the past.

I have added some images to try and describe this better, as you can see, the red rod always stays in the same orientation, that requires that it rotates relative to the flywheel while still moving with it. The red rod is made of aluminum, the flywheel is also made of aluminum. The black sliding component is a plastic bearing component.

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  • $\begingroup$ Not a centerless ground pin which most pins are, so I'm told. Lobes. Maybe just a tiny piece of shaft and not a pin? I guess it depends on the expected wear and load for if lobes matters. $\endgroup$
    – DKNguyen
    Commented Feb 11, 2022 at 15:05
  • $\begingroup$ The material of red part matters. $\endgroup$
    – Eric S
    Commented Feb 11, 2022 at 15:28
  • $\begingroup$ Since there's more room on the disc maybe press fit it to the red part and have it move inside a bushing in the disc. Then again, of the red part has to slide within the black part then maybe the red part is already made of a bushing material in which case maybe the pin should be press fit into the disc. $\endgroup$
    – DKNguyen
    Commented Feb 11, 2022 at 16:58
  • $\begingroup$ so to tag on to other comments, something from a plastic piun in a hole to a steel pin in a bronze bushing to a shaft in a roller bearing. $\endgroup$
    – Tiger Guy
    Commented Feb 11, 2022 at 18:32
  • $\begingroup$ one of the harder stainless steels would be a common starting choice, but of course it depends on details $\endgroup$
    – Pete W
    Commented Feb 12, 2022 at 3:22

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