Pokeball spinner for small hands (624Z bearing)

thingiverse

My kid really wanted the Pokeball spinner from Thingiverse, but at 6 years old, he found the 608Z bearing-based spinner too cumbersome to handle. So I tried scaling down the design for a 624Z bearing, but it wasn't going to look right due to non-linear scaling. I decided to redraw the design in FreeCAD using a scaled copy of the Pokeball spinner as a reference point. Keep in mind that this is extremely small, with center buttons on the balls measuring less than 4mm across, so you'll need to have your printer calibrated properly. It's highly recommended to use a 0.1mm layer height if possible and an absolute maximum nozzle diameter of 0.4mm. A 0.2mm nozzle would be ideal, but 0.4mm is the absolute limit. Since this is a spinner that requires both weight and strength, I strongly suggest using 100% infill. You can also add three M5 nuts to give it more weight for improved spinning performance. My printer was set up to print in ABS, but you may achieve better results with PLA if you prefer.