PTFE Filament Guide for MK3S+, MK3.5, MK4

Hi, I created a flexible attachment for the end of the PTFE tube to guide the filament from the spool to the extruder. The aim of this mini project is:

- so that the movement of the printer carriage does not overcome the resistance of the filament or even the filament tube - to make the filament change as easy as possible 2x 608 ball bearings are needed to assemble. I used mine from an old roller skate. This type of bearing is very readily available and you should have no problem buying them easily.

Usage: Simply put the "ptfe-insert-one-side.step" part on the end of the tube. It goes on and off easily so as not to destroy the tube but at the same time holds well and firmly.

The ptfe-insert is then inserted into the insert-holder, from the top, not threaded like a shoelace, and twist to lock the insert in the holder. Removal is done exactly the opposite way, rotate the insert and remove from the holder.

The ptfe-bearing-holder part is attached in 3 files.

- ptfe-bearing-holder.step contains both left and right halves, in slicer it is possible to disconnect the parts from each other - ptfe-bearing-holder-left.step left half separately - ptfe-bearing-holder-right.step separate right half Use what you like to print.

I have also attached two 3mf files and these are the project files for prusa slicer. I used version 2.6.1, the project is set up to use supports and for Prusament PLA filament. Just need to slice and export the gcode.

I am attaching a link to the Onshape document which has all the models. Use them as you like, modify them to suit your needs. https://cad.onshape.com/documents/ece9f6fb1e51dad06bab1260/v/925b0b13ebe29eb1a56d0cb5/e/7826df38f345df3e864ac175

You can also check out this simple PTFE tubes labels ;)

PTFE filament guide in action

When creating them I was inspired by two solutions here on printables, see:

Filament guide by Habony Norbert https://www.printables.com/cs/model/135950-filament-guide

MK3s filament guide V2 by JD https://www.printables.com/cs/model/39377-mk3s-filament-guide-v2

I printed everything from PLA. No glue needed. I printed with supports, but it will work without them. I hope this filament guider finds a use with you.