Thing to keep your hands busy while your mind focuses on other things. I've found it useful to keep focus while talking on the phone, reading and watching movies where I otherwise would feel more restless. Pinch the center buttons between your fingers and spin it, swing it from around the outer rings, balance it spinning on the top of your finger or just play with it however you like (hey, I don't judge).
It has tiny nubs on one of the rings which lets you count the sides, if you're into that sort of thing. These are small enough not to offset the balance in any noticeable way.
Uses four 608 bearings (608Z, 608ZZ...), commonly used for skateboards and inlines, which can be found dirt cheap on eBay; a set of 10 will cost 2-3€ and upwards. I'm personally using more expensive ceramic bearings for the center, and cheap steel variants for the outer bearings.
Print one Body, no supports needed. Sand the edges if they feel too sharp.
Print two Buttons with supports in the direction oriented in the model. The buttons are made to be a press fit and will fasten each other when met in the center of the bearing.
The bearings are made to be press fit. Do not use a hammer if you can't push the bearings in by hand - It is wise to use a vise.
Hi! I'm a tinkerer, designer and maker from Sweden. If you like my designs, feel free to leave a comment. :)
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