MyOpen3D Fidget Spinner Collection

thingiverse

Well, I'm joining the party late with fidget spinners, but now that I'm hooked, I'll toss my take into the mix. These designs are minimalist, print quickly and use minimal plastic - all will print in 10-15 minutes and are designed for a thin yet solid band around the 608zz bearing. Infill can be set to whatever (I used 20%) since it's only used a little bit between the bearings. Big Mama is 50 grams, designed for big hands with a spin clearance radius of 43mm. Little Daddy weighs 49 grams and is made for smaller hands with a 38mm spin clearance radius. The Cheap Skate is my attempt to push things to minimalistic limits by using very little plastic and M10 steel nuts as outer edge weights. It has a tiny spin clearance radius of 32 mm. The Typhoon is an extension of the Cheap Skate, pushing the spin clearance radius out to 47 mm with three more nuts for mega spin times. The bearing plugs are something I added at the last minute; they're just a slug that presses into the outer bearing holes adding some extra weight and color. I quickly discovered it's all about mass and its distance from the center point, combined with balance and limiting friction as much as possible. However, there are physical limitations mixed in, where you can only go as big as your hand allows. A few things to think about: ceramic bearings may be the best, but not all ceramic bearings are equal, so don't get too caught up in that hype unless you can afford it. I'm using hybrid ceramic ball, metal housing bearings and it's fun enough. Remove any grease from the center bearing using a de-greaser solvent like WD-40; it's debatable whether or not a little lite oil after de-greasing is helpful. I've been using a tiny drop of PTF-based tri-lube without noticing much benefit or drawback. There's no reason to use expensive bearings at the outer edges - just use cheap-o bearings everywhere other than the center bearing. Whenever possible, remove the rubber shielding on both sides of the center bearing as it only adds friction. However, once exposed, dust can cause friction issues too, so always use a finger guard plug after removing the bearing shields. Finger guards are good anyway as they help to avoid accidentally touching the bearing and slowing the spin. All of these spinners were printed on a MyOpen3D Seattle Prusa i3+ 3D printer at https://www.myopen3d.com/.