Fidget Bolt UPDATED (print in place toy)

New  release! After weeks of tweaking, I managed to solve main issues I didn't like about original version:

• nut no longer touches your fingers once it reaches top/bottom (people with low finger dexterity appreciate this)
• nut never gets stuck anymore, no need to shake the toy or anything like it

Printing instructions for V0.1 latest version

Filament: PLA

• 0.4 nozzle
• 0.2 layer heights, 
• 2 walls 
• keep at 15% infill

Once printed, you will find that nut is actually stuck to the lower part of the bolt, this is intended, you need to apply some force to make it unstuck. 

Printing instructions for V0 legacy

Filament: PLA 

• 0.4 nozzle
• 0.2 layer heights, 
• 2 walls 
• minimum 15% infill

Once print is finished, you'll find that nut doesn't move. It is ok, because it is stuck to the built-in support, just rotate it (it might take some force depending on the filament)

 For the first 10-20 uses nut still tends to get stuck on the bolt, but after usually starts running smoothly.

Story behind V0

I had an idea for this toy for almost a year, but until  September 2024 I simply lacked the skills and time to learn them, to actually design in it. When i just got my first 3d printer, one of the first models I printed, was a simple screw and bolt. I really liked to fidget with it, and always thought it would be cool if i could make nut and bolt combo, which prints in place, and the nut cannot be removed.

 So I learned how to use CAD, and started trying to model this toy. It took a lot of trial and error, I was stupid enough not to look at other similar toys, so I had to figure out myself, how to get perfect spacing,  angles so it prints in place, what's the perfect thread, so the nut rotates easily back and forth, what's the best texture for the nut and etc etc. Here are all of the prototypes (first on the left is the released model):

Finally, after months of trial and error , I can finally release a V0 version of this toy! I still consider this to be work in prog