Fidget Gear Ring

EDIT: Also check my version with diamond knurling. In case you have both, maybe comment what you prefer.

This is probably my best fidget toy! I printed dozens of them because people wanted them.

It's a small, but satisfying fidget toy. You'll probably not want to wear it all the day due to it's size, but it's unobtrusive enough so you can still do a lot of things while wearing it. But while wearing it, you have a fidget thing right at hand for some quick fidgeting. (I'm wearing one as I type, and fidgeting with it when I'm thinking about what to type next.)

Also the little planet gears look like plus signs - for some positive influence :) and they look quite a bit mesmerizing when moving in perfect unison.

I uploaded 5 sizes, 14mm, 16mm, 18mm, 20mm and 22mm. If you need another size, ask in the comments and there's a good chance I'll make that.

Printing: 

• 0.4mm nozzle (or lower?), 
• random seam placement,
• I use 0.17mm layer height.
• Tolerances are tight; requires a well tuned printer.

You might need to use a bit of force to break the gear loose at first, but after a bit of breaking in it is supposed to run quite smoothly.

If you can't get it free, try:

• reducing the extrusion multiplier (flow ratio) a bit
• or use a slightly negative value for XY size compensation (PrusaSlicer), e.g. -0.02mm,
  or a slightly negative XY contour compensation and a slightly positive XY hole compensation (OrcaSlicer),

Happy fidgeting!