Is this 3D model free to download?

Yes, Reuleaux Triangle Bearing Gears is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by DarlesChickens, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Reuleaux Triangle Bearing Gears 3D printable model by DarlesChickens

Reuleaux Triangle Bearing Gears

Source: Thingiverse by DarlesChickens

The Reuleaux Triangle Bearing Gears is a free printable 3D model from Thingiverse by DarlesChickens. A functional and fun set of planetary gears that look like they should not work...but they do. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

2,190 saves Source: Thingiverse Updated 2026-10-11 License: CC-BY · commercial OK 22 makes Category: Toys & Games

Tags: Break my printer, fidget spinner, Fidget Toy, Gearset, makers muse, mechanical toy, Planetary Gear

About this model

A functional and fun set of planetary gears that look like they should not work...but they do. Based on Reuleaux Triangle bearings and shapes of constant width. Have fun! Note: While I have printed these files successfully on my CR-10S with minimal issues, it seems like a lot of users are having problems with clearance. In response, I have uploaded the individual components, that can then be assembled post-print by flexing the external ring gear. Youtube link:

Frequently asked questions

Is this 3D model free to download?: Yes. Reuleaux Triangle Bearing Gears is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by DarlesChickens.
Who made this model?: Designed by DarlesChickens, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.