Spinfinity Coin - silent magnetic spinning fidget toy (+Spinfinity Hexa!)

**UPDATE** (06.05.2023)

These changes were made:

• Added texture to optimize the grip (you can print Spinfinity in two colors now)
• Depreciated non-embedded version, as the magnets could become loose and Spinfinity became a clicky toy then (nothing wrong with that, but constant hitting force for magnets resulted to some losing their outer coating, so not good right?), but the model is available in the “Old” folder
• Added Spinfinity Hexa!

Unique feeling

With its 608 bearing, Spinfinity rotates smoothly and effortlessly, creating an endless and mesmerizing spinning motion that captivates people of all ages. The magnets inside the toy snap in place, creating a satisfying tactile experience that adds to the overall enjoyment of the toy.

Good to know

Current tolerances are:

• 7.9mm for the inside of the bearing
• 22.2mm for the outside of the bearing
• 4.26mm for embedded magnets with 2.4mm depth

What do I need?

• 608 bearing
• 5-16 * 4x2mm neodymium magnets

Printin' settings

• 0.2mm layer height
• 60% initial layer width, to bring out the pattern better
• infill: whatever works for you, even 10% is fine, i printed at 20%.
• Print with holes facing up, preferably on a textured plate.
• Pause at layer 18 to drop in the magnets and filament change on layer 3, if you want.

You need to make sure your printer is dialed in, there are tight tolerances in this project. The diameter of the holes for the magnets in the friction-fitted version is 4.2mm (which is hard to press but stays in place!) and 4.3mm in the embedded version (coming soon) and 2.4mm depth. You can print a test from the “test” folder to check tolerances with your magnets. Be careful when inserting embedded magnets! In my case I ruined one print, because i moved the bed :P (I got Ender 3 Pro). Watch out for the polarity of the magnets!!

Check the tolerances of your 608 bearing with a test, provided in the folder “tests”, please refer to a photo describing the tolerances in this test. You can also test your 4x2mm magnets.

How to assemble

To assemble the toy, during printing pause, just force the preffered number of magnets in. One side should get the same polarity, the other - the opposite, so that they attract each other, when sides are put together. Then put the bearing in one side, and snap together with the other side! Sides should have an even number of magnets, for stability.

Number of magnets determines how far you will have to rotate the toy to snap and force that's needed to do so. It also depends on magnets you got, one set I had was awesomely strong and just 8 on one side and 2 on the other was perfect. Other set - not that strong, so I've used 8/8 magnets and it was good (but 8/4 worked nicely, too, just with lower strength).

Test it out for yourself, it mainly depends on the magnets! The worse magnets I have also became a bit clicky overall, because they are tiny bit smaller and less thick than the good ones. Be aware of that.

If you have problems with tolerances for the magnets, hit me up, I can cook up some more models to download :)

Download and a like is appreciated!

If you like the project, support me by using it! Or support me on Ko-fi!

This model concludes my 4-day efforts to think of, design, render and print as many magnet-related objects as I could. All of that while not knowing how to design anything in CAD and learning as I went (I’ve only used blender to model things before and not many of them)! I used OnShape. My 3mf files seem to place objects on the lower left of the bed in the slicer for some reason, I’m trying figure why, but meanwhile enjoy those toys!!