Filament guide for dry box, with o-ring screw cover IMPROVED VERSION (STP files included)

thingiverse

This is an improved version of my original filament guide and drybox pass-through design. The main enhancement over the original model is that this uses a 17.8 x 2.4mm o-ring around the ball, which should seal it better and also makes it smoother. This design was created for a Rubbermaid 21 cup cereal box (https://smile.amazon.com/gp/product/B00XJRMW5M/), which I am using as a drybox to store filament. The wall thickness this is designed for is 2.8mm, and the hole required is 34mm (1 3/8"). This design was inspired by YasiekPL's awesome "Filament Dry Box Dispenser": https://www.thingiverse.com/thing:3626260. To build this, you will need: 3x M3x10 screws 3x M3 nuts 1x P18 17.8 x 2.4mm O-ring (required for the ball) 1x 22 x 3mm or 22.1 x 3.5mm O-ring (optional for the cap) A short length of PTFE tube is optional, which is used to pass through the ball and provide a smoother filament path. It's not needed if using the remixed ball (options linked below), which use a pneumatic coupler. I used an older version (91512) of the following O-ring kit from Harbor Freight: https://www.harborfreight.com/397-piece-metric-o-ring-assortment-67580.html. I also used some clear silicone sealer on the inside and outside covers, which should help to seal this further. I included a picture of my enclosure filament pass-through, which is similar, showing where the P18 O-ring goes during assembly. Make sure to check out the remixes of the ball by Madewithlinux's and Mandryd, they are modified to use a pneumatic coupler so a ptfe tube can be connected: Madewithlinux's remix: https://www.thingiverse.com/thing:3850124 Mandryd's remix using a PC4-M10-0.9 coupler (includes threads for the coupler): https://www.thingiverse.com/thing:4035357 A STEP file is included for easy remixing. If you make one, please post it, and if you have a suggestion, please post a comment.