Fitting to mount a PTFE tube to filament box

prusaprinters

<p>To lower drag force on extruder and support of my printer, I´m using a PTFE tube between filament box and the extruder. Quality of print is increased due to low forces.</p><p>Parts are printed without support and are made out of PETG. Tightness of filament box is sufficient without an additional sealing.</p><p>The clearence between outer and inner thread is quite tight to avoid unwanted rotating of the nut. To assemble the nut to the body, I recommend to use two wrench (size 13mm). After assembling first time, nut could be rotated by hand.</p><p>The bore for the inner diameter is after printing smaller than 4mm to avoid a gap between the tube and the fitting. I recommend to calibrate the inner bore with a drill Ø4mm. Mount the cap nut without bending the clamps and rotate the fitting over the drill. &nbsp;To avoid damaging the clamps or to get a too big bore, I recommend to clamp the drill in a vice and to calibrate the fitting manuel.</p><p>For shown support ring where end of tube is fixed, follow the link: <a href="https://www.printables.com/de/model/160404-support-ring-to-fix-and-plug-ptfe-tube-if-filament">Support ring to fix and plug PTFE tube if filament (Ø1,75mm) is not in use von H3dSprint | Kostenloses STL-Modell herunterladen | Printables.com</a></p>