I saw this on tiktok one day, and figured i would try to make something similar.
https://www.tiktok.com/@rawkandrolling/video/7511056439142812974
https://industrialartifacts.net/products/c-1929-belmet-rollodor-self-balancing-ashtray
To assemble this, you will need about a meter of M6 threaded rod, five M6 nuts and washers and two skateboard bearings. You will also need something to weigh down the pendulum. I chose to chop up six M12 threaded rods, that i wasn't using anyway. -works great.
I also recommend super glueing the shaft together, as well as onto the center block, using the threaded rod inside, to mash it all together.
You will need to print:
3 perimeters: 2x wheels 1x center bushing 1x pendulum 1x center block 5x ( or however many you feel like ) shafts
2 perimeters: 1x catcher 1x asher 2x center spacers 4x bearing bushings
The pendulum hat is optional. Just seemed like a good idea to hide the counterweight.
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The author marked this model as their own original creation.