Is this 3D model free to download?

Yes, Preassembled Iris Box 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 emmett, 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.

Preassembled Iris Box 3D printable model by emmett

Preassembled Iris Box

Source: Thingiverse by emmett

The Preassembled Iris Box is a free printable 3D model from Thingiverse by emmett. I've been wanting to design a non-planar preassembled mechanism for awhile, but it took Prot0typ1cal's Venus Box to inspire me on what to make. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

11,961 saves Source: Thingiverse Updated 2026-11-02 License: CC-BY-SA · commercial OK 43 makes Category: Decor & Art

Tags: box, iris, mechanism, preassembled, supportless

About this model

I've been wanting to design a non-planar preassembled mechanism for awhile, but it took Prot0typ1cal's Venus Box to inspire me on what to make. That is a beautiful design, but the more I thought about it, the more I thought it should be possible to print without assembly. Combining that spherical box idea with my earlier iris box concept lead to this design. You can see how it works and how to free it up after printing here:

Frequently asked questions

Is this 3D model free to download?: Yes. Preassembled Iris Box 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 emmett.
Who made this model?: Designed by emmett, 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.