Is this 3D model free to download?

Yes, Locking ball and socket arm 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 alexrich82, 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.

Locking ball and socket arm

Source: Thingiverse by alexrich82

The Locking ball and socket arm is a free printable 3D model from Thingiverse by alexrich82. Ball and socket system, upgraded with a quarter turn twist lock on each ball joint to greatly increase pullout strength. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

5,884 saves Source: Thingiverse Updated 2026-10-06

Tags: Locking, ball, and, socket, arm

About this model

Ball and socket system, upgraded with a quarter turn twist lock on each ball joint to greatly increase pullout strength. My idea is to create a ball and socket system that is not only 3d printable but extremly strong and will not pop apart easily. This would be suitable for things like an LED lamp arm or heavy duty alligator clip where you don't want the neck popping apart. My original project was posted on hackaday: Update 5/17/15 New STL files posted on 5/17/15 - should work much better on printers with larger layer height / lower resolution

Frequently asked questions

Is this 3D model free to download?: Yes. Locking ball and socket arm 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 alexrich82.
Who made this model?: Designed by alexrich82, 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.