Dry Box PTFE Accessories

thingiverse

These are fittings for PTFE tubes running from your dry box directly to your printer. The PTFE Retainer is a snug bead that holds the tube in place and prevents it from sliding into or out of whatever you're passing through the wall if your dry box. I use one inside and one outside, butted tight against the sides of the dry box to keep the tube secure. The PTFE end cap is a press-fit closure for the end of a PTFE tube that's not in use. I use it inside the box if that PTFE tube is empty and at the end of the tube outside the box if I have filament loaded in that tube but it's not being used with the printer. These fittings are very non-essential, but now I don't have to worry about the PTFE tube slipping out or stray moisture creeping in -- or fouling a filament sitting in the tube for later use. I had to do a lot of scaling and testing to get these to fit correctly. The end cap should press into place easily, but still be snug on the end of the tube. Not falling off, but something easy to remove or replace. The PTFE tube retainers should be pretty tight. I want these to keep the PTFE securely in place in my dry box even if I accidentally pull on the tube, snag it against something, or otherwise apply moderate force. I made a test print of a handful of each part, scaling up in 2% increments until I found the fit I liked for each. I then printed a full set -- one cap per tube and two retainers. I didn't design the screw bulkhead fittings that seal the side of the dry box where the tube passes through. That's [Screwless Filament Feeder - 1.75 - Dry Box] by [DarthxRinzler]. It was exactly what I needed for the job and went together easily. The tube was a little loose, though, so I made the retainers to hold on tightly.