From HomeMadeModern.

I made a wind powered rock tumbler so I can make sea glass. Se my previous videos on tumbling glass using conventional tumblers along with my tests of dry tumbling glass.

Rock and Glass tumbler videos

McMaster links
McMaster is expensive but good for prototyping because of how well organized the website is. I started with this shaft and then searched for pieces that would fit on it
https://www.mcmaster.com/1346K19/

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