Fidget Spinner
Includes the STEP CAD file and 2 STL files for the 3D-printed parts.
A compact 3D-printed fidget spinner sized for younger kids, built around a 0.25″ shaft bearing and 3/8-16 hex nuts. Free 3D CAD files available.
Before creating my own design, I had successfully printed one of the many available Thingiverse fidget spinners. But the size was too large for my younger grandkids, so I designed my own smaller version.
I used a bearing measuring 0.25″ shaft with 0.625″ OD and 0.195″ thickness, plus three 3/8-16 tpi hex nuts (0.328″ thick, 0.551″ flat-to-flat) as the weighted tips.
Supplies
Materials & Hardware
- PLA filament (spinner body)
- Bearing — 0.25″ shaft, 0.625″ OD, 0.195″ thick
- 3/8-16 tpi hex nuts, 3 — 0.328″ thick, 0.551″ flat-to-flat
Tools
- 3D printer
- Workshop vise (pressing the bearing and nuts into the body)
Pulled from the build notes below — quantities weren’t specified in the original write-up beyond what’s listed here.
Construction Notes
For assembly, I used my workshop vise to press the bearing and nuts into the fidget body. All three pieces are intentionally tight fits.
I’ve also uploaded STL files to Thingiverse if you’d like to customize the design further.
Image Gallery
