Structural / Functional Issue

How to Fix PTFE / Bowden Tube Wear or Gap

Step-by-step fix for ptfe / bowden tube wear or gap on Bambu Lab printers including X1C, H2D, P1S, and A1.

How do I fix ptfe / bowden tube wear or gap?

1
Cut a fresh, square end on the PTFE tube using a sharp blade. A ragged or angled cut leaves a gap where filament accumulates and causes jams.
2
Replace stock PTFE with Capricorn tubing (blue) — it has tighter tolerances, better heat resistance, and less friction for smoother filament feeding.
3
For all-metal hotends (V3 KE, S1 Pro): the PTFE tube should stop at the heatbreak, not extend into it. Check the gap with a piece of filament as a feeler gauge.

Pro tip: PTFE tube condition directly affects reliability. Replace it every 3–6 months for consistent print quality.

Related Print Issues

Weak Layer Adhesion / Delamination Part Breaking Along Layer Lines Poor Dimensional Accuracy Part Too Flexible / Not Stiff Enough Bed Adhesion Failure / Part Detaching

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