Is this 3D model free to download?

Yes, Prusa i3 Mk3+ (extended Z rebuild) 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 Armatus, 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.

Prusa i3 Mk3+ (extended Z rebuild)

Source: Thingiverse by Armatus

The Prusa i3 Mk3+ (extended Z rebuild) is a free printable 3D model from Thingiverse by Armatus. We all love Prusa's, I personally own several of them. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

73 saves Source: Thingiverse Updated 2026-10-05

Tags: Prusa, i3, Mk3+, (extended, Z, rebuild)

About this model

We all love Prusa's, I personally own several of them. However, 8 inches of build height is rather restrictive, so I redesigned a few things about the Mk3 to take full advantage of the 12" lead screws provided in the original Mk2/3 kit. The main part of this build is a new 25 series frame (1" extrusions would be just as good) for the printer. I bought mine cut to size from 8020.net, it cost about $70. For the 2525 extrusions you need 2x 332mm extrusions and 2x 370mm extrusions. For 2550 extrusions you need 1x 332mm extrusion and 2x 480mm extrusions for the Z if using the stock motors. If upgrading to longer lead screws, simply increase the length of the Z extrusions and Z linear rods to match. You'll need ~80 of these t-nuts, be sure to select M5 for the thread and also get ~100 10mm M5 sc…

Frequently asked questions

Is this 3D model free to download?: Yes. Prusa i3 Mk3+ (extended Z rebuild) 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 Armatus.
Who made this model?: Designed by Armatus, 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.