The Anycubic Kobra 3 Series / Kobra 3 Max Quick-Connect Fitting Housing is the PTFE tube guide and retention assembly mounted at the filament feed entry of the print head.
- Function: Securely locks 2mm x 4mm PTFE tubes with a spring that prevents them from slipping during intense filament retractions and rapid print head movements.
- Push-to-Connect Retention: Contains internal stainless steel teeth and a spring that tightly hold the 4 mm outer diameter of the PTFE tubes without damaging the inner filament bore.
- Low Friction Filament Path: Features a smooth internal funnel that guides the 1.75 mm filament directly from the external feed tube to the extruder gears without tangling.
- Anti-Threading and Tension Support: Stabilizes the PTFE entry point against structural stresses caused by rapid direction changes during printing at speeds of 600 mm/s.
- Integrated Fixing Design: Designed as a compact, direct-replacement housing that snaps directly onto the top cap of the tool head or the filament node housing.