Is this 3D model free to download?

Yes, Anet A8 (Prusa i3) X-Axis Belt Tensioner 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 lokster, 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.

Anet A8 (Prusa i3) X-Axis Belt Tensioner 3D printable model by lokster

Anet A8 (Prusa i3) X-Axis Belt Tensioner photo 1

Anet A8 (Prusa i3) X-Axis Belt Tensioner photo 2

Anet A8 (Prusa i3) X-Axis Belt Tensioner

Source: Thingiverse by lokster

The Anet A8 (Prusa i3) X-Axis Belt Tensioner is a free printable 3D model from Thingiverse by lokster. Yet another X-Axis belt tensioner for Anet A8 and other Prusa i3 designs I designed from scratch in Blender. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

488 saves Source: Thingiverse Updated 2026-10-14 License: CC-BY-NC · non-commercial 11 makes Category: 3D Printer

Tags: Anet A8, prusa i3

About this model

Yet another X-Axis belt tensioner for Anet A8 and other Prusa i3 designs I designed from scratch in Blender. You can use the stock smooth pulley or a toothed GT2 16 tooth pulley (with 3mm hole). This tensioner does not bend the Z rods - it uses the X smooth rods for support. The only additional parts it requires is 3x M3 threads + nuts. Use whatever lengths you have & can fit. It DOES NOT require longer than the stock belt, and does not hit the extruder when you try to go to X=220 :) When slicing, do not rotate the objects - leave them as they are (otherwise the will be weaker), and allow supports everywhere. Check out more of my stuff on

Frequently asked questions

Is this 3D model free to download?: Yes. Anet A8 (Prusa i3) X-Axis Belt Tensioner 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 lokster.
Who made this model?: Designed by lokster, 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.