Parametric Universal DRYBOX Pro

This is a universal cereal container dry box I made about a year ago to fit most of my spools. Since getting my first printer I tried many other dry-box setups and was never satisfied. Some lack parametric designs, some lack reliable capability to roll from different locations and some didn't had a design that I like. So, probably there are more people like me who can benefit using this style. I am not using any silica-box as I think it is a waste of material when you can use bottom of the box easily. My boxes holding humidity levels even after 10 months(first prototypes that I made)

Throughout last few months I've been testing and making updates to be sure it is suitable to be shared. Including parametrized files for your desire to change and fit. Remember, the size and toleration made for my use case and might be different in your case depending on filament, printer and spool size. I've included 52mm 3MF files if you want to use it for Prusament spools and 54mm for Hatchbox.

Printing:

I've used both PLA and PETG for printing and both does well. Although, I recommend PLA as it doesn't require to be super rigid and will hold in place for all use cases.

• Supports: none
• Infill: minimum 20%
• Perimeters:
  • Male/Female: minimum 3
  • Shaft: 2
  • Other parts: not necessary

Preparing:

First, you will need some parts and tools to complete this:

• Cereal box
• 608-2RS bearings
• PTFE Tube
• PTFE tube fittings
• Drill and 3mm and 8mm drill bit or something to make the holes
• Exacto knife/knife
• Marker
• 6xM3 screws

Additional parts tat I'm using from other makers are:

• PTFE-tube 60° chamfer tool
• Magnetic PFTE coupler dock/terminator

Assembly:

  If you're not using the same cereal boxes skip this paragraph. Otherwise print the item named "Tool" use it to mark holes in a box or just to make holes. I made this tool specifically fir this containers so I can align “center” using it without doing complicated calculations every time. I've made over 20 boxes by now. Take a look at attached pictures and pay attention which lines I am using. It must be perfect 90 degrees. So, make sure your printer tolarations are right. THE TIP OF TOOL MUST BE ALIGNED WITH CENTER LINE!

In order to make clean holes, choose slow speed to roll all excess plastic around drillbit and just grab it by hand. You'll need to install flanges from inside and secure them with M3 screws. Flanges already have enough thread to hold them so no need for hex nuts.

Putting male-female hub together is not complicated. I put bearings first and always start with female, put it on then screw male part from other side. Don't push too much, springs must stay flat while flush to spool surface with lips. They also have to spin easily without any issues:

The hole for filament feed is can be anywhere you want. I put it in front as I organize them in a specific fashion, it gives me to hang hygrometer from that hole without using extra effort.

Hygrometer hanger file is attached but PTFE cap is from different maker(I've included link)