Hand Spinner / Fidget
Increase iron balls 3 to 6 to expand spinning time. This handspinner can rotate for 2 minutes.
Please print 2 x spinner3_6_2.stl.
And set 10mm 6 iron balls to spinner halls, to adhere them.
2 x spinner3_6_2.stl
1 x M8 16mm bolt
1 x M8 nut
2 x M8 washer
1 x 608 bearing
6 x 10mm iron balls
To see detail.
https://youtu.be/GlFjySLC-70