Yoyo bearing that is mostly air/liquid tight

Yo-Yo Mods and Maintenance
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I’m looking for fluid/liquid bearings that are size c I’m pretty sure they don’t exist but I’m wondering if there is size c bearings that are mosty air tight / liquid tight so I can try putting galinstan in it (as an experiment)

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I’m all for experimenting, but just FYI, some of the smoothest and longest spinning bearings I’ve used in so many different yo-yos over the years are manufactured by NSK. Specifically, the gold and platinum plated bearings. They are not sealed and run bone dry. Best bearings I’ve ever used in a yoyo

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Ik air tight or tight fitted shields cause friction slowing it down but this is more of a prototype design for tests so I can than later make a custom bearing

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you would have better luck buying some rubber shielded R188 bearings and then doing whatever you wanted and reinstalling the rubber shields and sealing them somehow. IMO.

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Thanks

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Love the idea but note any additive to the bearing will reduce spin time

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