Is this 3D model free to download?

Yes, Aperture Science Rotation Indicator 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 BuzzAldrin, 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.

Aperture Science Rotation Indicator 3D printable model by BuzzAldrin

Aperture Science Rotation Indicator photo 1

Aperture Science Rotation Indicator photo 2

Aperture Science Rotation Indicator

Source: Thingiverse by BuzzAldrin

The Aperture Science Rotation Indicator is a free printable 3D model from Thingiverse by BuzzAldrin. Couldn't find one of the rotation indicators I liked so I made my own. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

63 saves Source: Thingiverse Updated 2026-10-15 License: CC-BY · commercial OK 1 makes Category: 3D Printer

Tags: extruder, indicator, mk3, motor, prusa, rotation

About this model

Couldn't find one of the rotation indicators I liked so I made my own. Just attach a small 8x3mm magnet to the stub on the backside with superglue and it will spin as your extruder moves filament. EDIT: Also uploaded the "normal version" where the logo is facing the correct way. (I flipped it originally so it would rotate in the direction of the lines)

Frequently asked questions

Is this 3D model free to download?: Yes. Aperture Science Rotation Indicator 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 BuzzAldrin.
Who made this model?: Designed by BuzzAldrin, 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.