PTFE Tube Chamfer and Cut Jig

Simple jig for PTFE tube cutting (4mm OD), having:

- 60° (30), 90° (45) and 120° (60) degree chamfer tool (works like pencil sharpener) - Length of 13, 15, 19, 35.3, 38.8, 42.3, 43.4, 44.2, 50 and 66mm cutting tool Needed tools:

- Sharp blade knife for cutting (9mm blade) - Center drill for an easy way to make 60° degree inside chamfer ( eBay Search for Center Drill ) - Or a regular 4mm drill as an alternative Post processing may be necessary, depending on the filament and the printer used to print the jig. To clean the PTFE tube holes a 4mm drill is needed - remove the dents from the holes by hand with the drill bit, power tool should not be needed. The knife slot in the length cutting jig can be cleaned out with the back side of the knife (9mm blade).

See photos for usage.

Tube length for Prusa Printers can be found here: How to trim PTFE tube - Original Prusa printers

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Updates:

27. April 2022: Description updated with post-processing.

18. May 2021: Added 38.8 mm cutting length for the Prusa Mini titanium BROZZL option. As there is no official specifications yet, the length is estimated from samples.

10. Dec 2020: Added 42.3 mm cutting length for the Prusa I3 MK3S+. All cutting tools now has the length written on the underside of the tool.

17. May 2020: Added PTFE tube cutting length of 35.3mm for Prusa Mini Bondtech edition. Can be used with the 120° chamfer tool.

24. February 2020: Cutting length of 43.4mm for Prusa Mini hot end PTFE tube and external 120° chamfer tool.

19. November 2018: For some hot ends the external chamfer angle is now 60° degrees - this made me add a tool for this angle.

To make it easier to distinguish the tools, they are marked with 60°and 90°.

All tools can be found in the files section.

Print instructions

Shown models is printed in Devil Design PETG Black and Gray.

Post-Printing

The 60°/90°/120° degree chamfer tool may need to have the hole cleaned with a 4mm drill/reamer as it has to be a tight fit to work properly.