Planetary Gear Fidget Spinner - No Carrier
This is just a simple planetary gear mechanism. It has no carrier so the planets had to be designed to be "self-aligning". Fusion has a nice spur gear generator add-on but I can't figure out how to give proper clearances where needed on gears. Obviously, one can select and offset faces once they are created but that kind of tediousness makes me wonder if there's a better way.
At any rate, the model should be rotated as is when imported into your slicer. Standard printer settings. Print in place and break/snap where each is connected to the others. I had to use a bit of lube to make it all spin nicely.
Change: 12/31/2025 The gears were not given enough clearance and so made the spinner hard to break apart. This updated file works great.