Knurled PC4-M6 PTFE Drybox Feeder

myminifactory

This simple solution for a drybox filament feeder uses the PC4-M6 bowden tube coupler. To assemble, you only need one 8mm hole in your drybox for the filament feeder to pass through. No tools are required as the knurling provides plenty of grip to tighten the parts by hand. In my setup, I use PC4-M6 couplers that allow the 4mm OD PTFE tube to pass straight through, putting the end of the tube right up to the filament spool. The basic feed through consists of two parts: the 01 Threaded part with M6 thread to attach the PC4-M6 coupler inside the drybox, and the 02 Hex part with a slot to push in the PC4-M6 coupler. A third optional part is included for those who want to cap off unused feeding holes. The 03 Cover part slides over the securing ring of the coupler for a snug fit, limiting airflow and providing a clean aesthetic. When printing the cover part, it's recommended to have your bridging settings tuned in well to avoid insufficient clearance between the coupler and the top inside of the cap. All parts can be printed in the provided orientation without supports.