Filamet spool holder for drybox.

This is my version of a coil stand with a filament. 

Initially, I designed it to be used in a specific container so that the filament would stay dry. But, I think that it can be used both in other containers, and completely independently. 

Overall dimensions of the stand: width - 95 mm, length - 198 mm, height ~ 70 mm.  There are two versions in the set : A - for coils up to 78 mm wide; B - for coils up to 85 mm wide.

For assembly, you will additionally need:

- 4 pieces of 608 bearings (22*7 with a landing diameter of 8mm);
- 4 pieces of rod or tube with a diameter of 8mm and a length of 80 mm (I used aluminum tubes);
- 4 screws M5*20 or 2 rods or tubes with a diameter of 8mm and a length of 95 - for version A;
- 4 screws M5*16 or 2 rods or tubes with a diameter of 8mm and a length of 95 - for version B;

For the arrangement of the drybox, you will additionally need:
- ~200-250 grams of silica gel (or other moisture absorber);
- fitting for PTFE tube; 
- hygrometer with thermometer (optional);

1. Print out all the details of the set (in two copies) from the plastic available to you (I used ABS, but both PETG and PLA will do).

2. Clean with an 8mm drill four holes for crossbars, and make sure that they enter there (tightly but not by force).

3. Screw the bearings directly into the plastic (for PLA and ABS, it is advisable to pre-cut the rubber with a tap). 

4. Then install the crossbar in one of the walls, put the rollers on the bearings and firmly plant the second wall on top. Be careful when assembling, help the crossbars find their holes. 
 

After assembly, scroll the rollers with your hand and make sure they rotate freely.

Then, I installed the fitting and hygrometer in the container. I placed a stand and poured silica gel (make sure that the silica gel does not interfere with the rollers to rotate). 
Now my Nylon from 3d-club (PA 6E) will be dry much longer! ;)