PTFE M4 threading tool

prusaprinters

<p>So I want to use M4 nuts for attaching PTFE tubes to my extruders, I've had few broken PTFE couplers when doing multi-material printing with strong extruders. But one thing has always been a bit cumbersome and that's getting the nuts thread to the tubes. It's quite hard and frustrating to get the nut to start threading properly and straight. So I made this little helper tool that makes this task easier.</p> <p>OpenSCAD source in github: <a href="https://github.com/spegelius/3DModels/blob/master/Multi-material_feeder/Multi-material_feeder.scad">https://github.com/spegelius/3DModels/blob/master/Multi-material_feeder/Multi-material_feeder.scad</a></p> <ol> <li>Print the part. The printed cap should thread to the tool part, if not there's probably issues with the tolerances. Tune slicer or the source.</li> <li>Inset a M4 nut into the tool nut slot</li> <li>Screw the cap on to hold the nut in place</li> <li>Feed PTFE tube in to the bottom of the tool</li> <li>Push and rotate the PTFE tube to thread it in to the M4 nut (protip: use paper towel or cloth for better grip)</li> <li>When nut is threaded enough, unscre the cap and push the PTFE tube to free the M4 nut and pull the tube from the tool</li> </ol> <p>As the PTFE tube compresses with the nut, I use 2mm drill bit to open it up.</p> Category: 3D Printer Accessories