I took the rodless spool holder that I love so much, and ended printing out a 90% version of the nut at 0.1mm just because I thought it was a really cool example of a 3d printed part! I liked it so much and kept playing with it in my hands, I set out to design a fidget spinner around this already printed part!
I took the screw portion and cut out a space for a standard 608 bearing so i could make this thing spin!
I'm going to update the caps soon so that it'll be a little bit easier to spin, but otherwise, pretty happy with the way things came out :)
The higher the infill on the nut, the greater the weight and therefore the longer the spin time.
I've printed the screw portion with and without supports. Supports on my machine in cura were pretty impossible to remove, but produced a nicer looking part than without supports.
I ended up printing it at 0.1mm to be as ascetically pleasing as possible, however I've also successfully printed things at 0.2mm
All parts were printed with PLA and sliced using Cura 15
I used a raft on the nut part because otherwise it was next to impossible to remove from my bed
Post printing assembly:
The screw and nut may or may not fit together well depending on your printer tolerances. The issue I ran into was that the screw portion would get stuck in the nut if I tried to jam it in fresh off the build platform. If you work at it and screw it in and out of the nut, it'll eventually round itself down and become a very nice and smooth fit!
Press fit your bearing into the hole provided. If yuou have issues, you may need to widen the bearing hole by 0.5mm (updated file to come soon)
Attach the fidget spinner caps, and go wild!
How I designed this?
I used the Microsoft 3D Builder and just chopped a bunch of stuff out of the screw using cylinders, and added a brim to the bottom so that it will stop when inserted so far into the nut.
That's.... about it actually lol