Nuke Fidget Spinner

myminifactory

One of the photos shows the design evolution I started with Tinkercad and made a simple circle with grooves for a lock-washer to fit. The initial design worked but needed more weight. I then modified it to use 5/16" (12.5mm) nuts, changing the design slightly to use caps on the nuts - this worked better but wasn't perfect yet. Next, I switched to Fusion 360 and ended up with the final design, which by happy accident looks like the 'Nuclear warning symbol' hence the "Nuke Fidget Spinner". A hole in the center is for a 608 (8x22x7mm) bearing. On June 2, 2017, I uploaded a new version of the 608 Bearing caps after noticing that the originals sometimes broke when trying to insert them fully. So, I changed the design and these new ones work much better. On June 4, 2017, I changed the Bearing caps slightly again for added strength and also corrected the loading orientation so they don't have to be rotated. Additionally, I added a full plate version with all the caps and body. For those who may not know this, remove the bearing shields and soak the bearings in a degreaser (I use TSP, available in the paint section) for 15-20 minutes. Then dry and blow out the bearings - I went from 12-15 second spins to close to a minute spins after performing the cleaning (do not use any lubrication, it's not needed). On June 4, 2017, I also removed the bearing retaining clip (the part that holds and centers the balls in the bearing) which mine were made of plastic and easy to remove. Removing this increased spinning time to 2 minutes! Print Settings: Printer - BigBox Pro; Nozzle size - .04; Rafts - No; Supports - No; Resolution - .02mm; Infill - 20%. Notes: Tolerances are tight for the 608 bearing caps, so you may need to shave a little off the shaft to get a good fit on my printer. They're tight but go in fine - your mileage may vary.