Enclosure Filament Inlet Hole - Lip Ring (for .75" hole)

thingiverse

While implementing ["Sterilite 20qt Filament Dry Box v2" by StvPtrsn, October 30, 2019](https://www.thingiverse.com/thing:3947469) ...also making use of the ["Filament Enclosure Tap (1.75mm)" by dottom22, February 26, 2017](https://www.thingiverse.com/thing:2139021) ...I realized I would have to drill a new hole in the top of my enclosure (for my Snapmaker 2) for a new filament inlet. (Used a 3/4" spade drill bit, drilling through 3mm plexiglass.) Although I am implementing the Bowden tube option, the Snapmaker 2 enclosure's provided filament inlet is on the left side, and in my space, that's a very tight fit against an existing shelf. I needed a new filament inlet on the top for easier access. I designed this lip ring to provide a smooth, curved surface for the incoming filament / Bowden tubes. **NOTE:** If you need to drill a new hole in your enclosure for a filament inlet, position it in back so the gantry won't be passing in the way of your filament's path to the extruder head. I designed both a "snap-in" version with a lower lip, to make it less likely of accidentally coming out (and that version has a "slit" in the side to make it possible to install it), and a "drop-in" version with no lower lip. I designed these in SketchUp, and I am providing both the SketchUp files and the .STL files. **NOTE:** Also, I designed and uploaded a remix of dottom22's Bowden tube piece for his "Filament Enclosure Tap (1.75mm)": [Tweaked Bowden tap - Remix of Filament Enclosure Tap, 1.75mm, by dottom22](https://www.thingiverse.com/thing:4691036) ...because I noticed the inner chamber on his Bowden tube piece was not tapered at all on the end where the filament would need to exit the chamber, and I knew that "threading the needle" to blindly get the filament to find that far-side hole would be an issue. The remixed version I have designed has that fixed. Many kudos to both ritchrock and dottom22. Thanks for the thingies!