I have made a geared fidget spinner using tinkercad. this spinner uses four 608 bearings which have a dimension of 22*8*7mm(od*id*h).
Step 1: Download & Print
Download the stl file of the spinner.
layer height: 0.1mm - 0.2mm
top-bottom thickness: same as that of shell
You can try other settings. These are the settings that were used by me.
Step 2: Assemble
After printing the spinner, its time to assemble it.
Press fit between the bearings and the gears.Place the three bearings in the support with the axes and the last one in the middle, then clip with the other support.
Enjoy playing with the spinner.