Is this 3D model free to download?

Yes, Primo humanoid robot 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 RiverFamily, 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.

Primo humanoid robot 3D printable model by RiverFamily

Primo humanoid robot

Source: Thingiverse by RiverFamily

The Primo humanoid robot is a free printable 3D model from Thingiverse by RiverFamily. Primo is an open source humanoid. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

30 saves Source: Thingiverse Updated 2026-10-24 License: CC0 · commercial OK Category: Vehicles & RC

Tags: actuator, android, biped, engineering, humanoid, humanoid robot, isaac sim, jetson, mechatronics, nvidia, onshape, open hardware, open source, reinforcement learning, robot

About this model

Primo is an open source humanoid. 3D printed structure in PA-CF, 30 RobStride quasi-direct-drive actuators, NVIDIA Jetson AGX Thor, Unitree G1 kinematics as reference. Height ≈ 1.40 m, ≈ 45 kg. Video, CAD tour and walking in Isaac Lab: Still in design, not built yet. Everything is shared to build it together: CAD, printable STL of the structure, bill of materials with links, electrical scheme, URDF, simulation files, walking policies in Isaac Lab and the handoff to continue the project, also with an AI. Files here: the printed structure as STL (20 parts, left and right, millimetres, design state) and the first print projects as 3MF, the ankle offset gimbal and a leg test plate (femur, hip bracket, tibia). What is bought, motors, hands, battery, computer, screws, is in the bill of materials…

Frequently asked questions

Is this 3D model free to download?: Yes. Primo humanoid robot 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 RiverFamily.
Who made this model?: Designed by RiverFamily, 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.