Butterworth Design - Prusa Mk3/Mk3S R4 Extruder Mod Filament Path Alignment and Indirect Mk3 Filament Sensor 3D printable model by Nathan Whitchurch

Butterworth Design - Prusa Mk3/Mk3S R4 Extruder Mod Filament Path Alignment and Indirect Mk3 Filament Sensor

Source: MyMiniFactory by Nathan Whitchurch

The Butterworth Design - Prusa Mk3/Mk3S R4 Extruder Mod Filament Path Alignment and Indirect Mk3 Filament Sensor is a free printable 3D model from MyMiniFactory by Nathan Whitchurch. Please view full images!  There is important information that may otherwise be cropped off. You can download the STL file from the original listing below and print it at home.

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164 saves Source: MyMiniFactory Updated 2026-05-05

Tags: prusa, extruder, alignment, Airflow, MK3, mk3s, filament_sensor

About this model

Please view full images!  There is important information that may otherwise be cropped off. If you try these parts and this design, thank you! Please let me know if you have any feedback or issues. N4 extruder parts are a modified version of the Prusa R4 parts for the Mk3S extruder. **************************************************** Revision History April 1, 2019: Added a version of the X-Carriage (for both Mk3 and Mk3S sensors) for folks who are using X-axis parts with 16T idlers (e.g., Vekoj's x-axis mods). March 18, 2019: Added an "N4A-XT" version for both Mk3 and Mk3S sensors. This version restores the vertical height in the extruder heatsink air channel to what would be found on the official R3 parts prior to the release of the Mk3S/R4 parts.  See the associated uploaded image for a…

Frequently asked questions

Is this 3D model free to download?
Yes. Butterworth Design - Prusa Mk3/Mk3S R4 Extruder Mod Filament Path Alignment and Indirect Mk3 Filament Sensor is free to download from MyMiniFactory. Click the "Download free STL" button above to open the original listing.
Where is the STL hosted?
The download is hosted by MyMiniFactory, not by Thinger. We link you directly to the original listing by Nathan Whitchurch.
Who made this model?
Designed by Nathan Whitchurch, published on MyMiniFactory. 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.

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