Announcement: You can now purchase this spinner from my shop. Check it out!

Update 2/20/2017: Added a version of the pins that features a twist-lock mechanism based on 2ROBOTGUY's ingenious design. They interlock for a nice, sturdy fit that won't come loose easily.

Update 2/20/2017: I've added a new version of this spinner that features an embedded bearing, as well. Simply pause the print as normal and insert the bearing alongside the 3 counterweights.

I decided to hop on the spinner bandwagon because I love fidget toys. But I don't like the exposed hardware on most spinners. This version uses hex nuts that are inserted during printing as the counterweights for a seamless look and feel. It's also a bit more compact than spinners that use bearings as counterweights.

Requires 1x 608 skateboard bearing and 3x 3/8" hex nuts. I chose brass ones since they're heavier but any nuts should work. You could also use hex stock cut to the same size, which would increase the weight (since the center of the nuts is hollow) and improve the spin time, but also increases the amount of work that needs to be done in order to build these. The nuts must be a maximum of 6.35mm thick and 15.85mm wide (from flat to flat). The ones I used are here but you could probably find others that will work.

Printing one of these is fairly simple but the mid-print hardware insertion can be confusing for some people so read the printing instructions below for more information.