Filament Dry Box - Low Profile Octagon

Octagon shaped, low-profile dry box for filament. I store my filament in a drawer and this box fits in a square array and is narrow enough so I can stack 2 in the drawer when layed on its side.

Latch and hinge design inspired by (copied from) zx82net

Print instructions

hardware needed:

ptfe tube to pass filament out of the box
pg7 cable gland to hold ptfe tube
8x m3 25mm countersunk screws
small length of 1.75mm TPU filament for a gasket
(I use 95 shoreA but softer would be better)

Optional:
4x 6700 bearings (10x15x4)
3mm id, 4mm od ptfe tube. For use with the latch arm and hinge with "4mm hole". Cut a small piece of the ptfe tube, insert in 4mm hole, then attach with m3 screw. This makes the joints operate very smoothly.

The top and bottom mate with a tongue-in-groove joint. The groove in the bottom part is designed to hold a 1.75mm TPU filament to serve as a gasket. The tpu needs to be pressed in to fit properly. I use a small hex wrench to push it down. Once in, it holds itself. When properly assembled, some force is needed to completely close and latch the top. It's pretty air tight but not completely.

Add desiccant to the hub to keep everything dry.

Rollers can be added using 6700 bearings so the filament can be pulled when the box is upright (out the side) or tilted on it's 45-degree face (filament out the bottom). I chose 6700 bearings to keep the overall profile small. I get them from Amazon