Is this 3D model free to download?

Yes, SG90 mini robot arm S9 by FrN (Robot Arm for everyone!) 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 Francis128, 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.

SG90 mini robot arm S9 by FrN (Robot Arm for everyone!) 3D printable model by Francis128

SG90 mini robot arm S9 by FrN (Robot Arm for everyone!) photo 1

SG90 mini robot arm S9 by FrN (Robot Arm for everyone!) photo 2

SG90 mini robot arm S9 by FrN (Robot Arm for everyone!) photo 3

SG90 mini robot arm S9 by FrN (Robot Arm for everyone!) photo 4

SG90 mini robot arm S9 by FrN (Robot Arm for everyone!)

Source: Thingiverse by Francis128

The SG90 mini robot arm S9 by FrN (Robot Arm for everyone!) is a free printable 3D model from Thingiverse by Francis128. Here is a US10 dollars DIY mini-robot which designed for HK student. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

537 saves Source: Thingiverse Updated 2026-10-10 License: CC-BY-NC · non-commercial 1 makes Category: Vehicles & RC

Tags: SG90, mini, robot, arm, S9, by, FrN, (Robot, Arm, for, everyone!)

About this model

Here is a US10 dollars DIY mini-robot which designed for HK student. It uses the most common SG90 mini-servo motors and was powered by Ardurino Pro-mini or Nano. Each servo have added a different step-down gear to increase the torque and reduce the speed to a reason manner. Engineering Notes: - The waist servo have a speed reduction of 1:2 and 90 degree of rotation. - The upper arm servo have a speed reduction of 1:3 and 60 degree of rotation. - The lower arm servo have a speed reduction of 1:4 and 45 degree of rotation. - The base turning servo have a speed reduction of 1:5 and had extended the servo 5K VR from the servo in order to provide sufficient torque and 180 degree angle of rotation. - Six 4mm dia metal ball are required to support the base turning gear. - All servo motors are usi…

Frequently asked questions

Is this 3D model free to download?: Yes. SG90 mini robot arm S9 by FrN (Robot Arm for everyone!) 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 Francis128.
Who made this model?: Designed by Francis128, 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.