MK4 Reverse Bowden Adapter (attaches to PC4-M10 or directly to your 4.1mm OD PTFE tube)

MK4 Reverse Bowden Adapter (attaches to PC4-M10 or directly to your 4.1mm OD PTFE tube) — Image 2 of 3

3D model · Printables

MK4 Reverse Bowden Adapter (attaches to PC4-M10 or directly to your 4.1mm OD PTFE tube)

Platform: Printables
Price: Free
License: CC-BY; Print, modify and use commercially — credit the author.
Formats: STL

105 Likes
681 Downloads
15 Makes
17 Comments
3 698 Views

Author:timeshock6

Published 2023-08-13

Download on

Printables

Description

The Prusa MK4's extruder filament inlet has a threaded M5 hole for which Prusa provides a Festo QSM-M5 fitting to use with MMU3. This model replaces the QSM-M5 in a reverse bowden system for the MK4.

The adapter is designed to take a PC4-M10 coupler, but it is also designed to be able to work without one. You can use a PTFE tube with an outer diameter of approximately 4.1mm and still be able to secure it to the adapter through a recessed hole.

You can print this upside down without support in approximately 12 minutes on a MK4. Using a PETG filament is recommended.

This was largely inspired by https://www.printables.com/model/550181-mk4-reverse-bowden-adapter-coupler-edition and https://www.printables.com/model/547831-mk4-reverse-bowden-adapter. I created this version as the others were only secured by friction and would come loose.