A Better PTFE Bowden Tube Cutter

*update: added STL for PC4-M01/PC4-M10 fitting

Here is my design of a PTFE Bowden tube cutting jig that actually works.

With Bowden printers such as my Ender 3 v2 and my Voxelab Aquila, it's critical to get the Bowden tube seated against the stock extruder's nozzle as flat and as tight as you can. By not getting that perfectly flat cut, I ended up getting print clogs.

I've printed a lot of the other PTFE tube cutting jigs on thingiverse. What I've found is that they were very prone to cutting the tube at an angle. I had even bought a PTFE tube cutter (similar to the Capricorn ones) and it was even worse. This resulted in mulitple retries cutting the end to get that perfect cut. I was frustrated with every design I tried,

Where I think this design improves on the others is:
1.) In the other designs, I had to hold the Bowden tube very still with my fingers. But I could still feel the tube moving when the blade began cutting. That is why I designed mine so that a PC4-M6 coupler can hold the tube securely during the cut.
2.) To cut a tube with control, I find you should to cut towards yourself (if you have the right grip). It is extremely safe for ADULTS to cut towards themselves with the right grip (look it up).

This tool has consistently resulted in near-perfectly flat (perpendicular) cuts for me.

Parts you'll need are:
1.) Qty 1 PC4-M6 or PC4-M01/PC4-M10 coupler.
2.) A sharp X-Acto knife or equivalent (ideally).

I've included the stl that I used as well as the fusion 360 file.

Print Settings

Printer Brand:

Creality

Printer:

Ender 3

No

Supports:

No

0.16mm print height

Infill:

15