Filament dry box for 3-4 spools of filament

thingiverse

My custom dry box for storing 3 to 4 spools of filament. Many different designs exist, but this is my solution. The vertical support rod is positioned at an optimal height for most spool sizes when using two spool hubs on each spool. 1 Sterlite 20qt airtight storage container. 24 machine screws with a diameter of 3mm and length of 10mm (alternatively, 3mm x 8mm screws can be used). 24 nylock nuts with an inner diameter of 3mm. 24 washers with an outer diameter of 3mm. 1 PTFE tube with an outer diameter of 3mm and an inner diameter of 2mm. 1 threaded rod with a length of 12 inches and a diameter of 5/16 inch. I used the available 3mm OD x 2mm ID PTFE tube for this project. The nut reliefs on all parts are quite shallow (only 1mm), but they worked effectively in my case. The round base of the rod holder and the U-shaped "extrusion" are perpendicular to each other, while the Sterlite box has an angle of approximately 3 degrees on all sides. I printed several variations of the U-shaped rod holder. One version features reliefs (m4 hole with m3 nut relief) and a small section to center the rod. Another version includes deeper reliefs (0.2mm deep text on the back). A third option has reliefs for an 8-32 thread size (m5 hole with 8-32 nut relief). The final two options are a simple m5 hole with no reliefs and an 8-32 thread size without reliefs. For comparison, the red filament is Hatchbox PLA, the one in the middle is EasyFil PLA, and the one on the right is Makergeeks ABS. I have not experienced any issues with the rod holder coming loose from the Sterlite box walls using m3 washers. However, if that were to happen, I would design a backing plate for added security.