Stackable upcycled cardboard cores

They come from your filament rolls (especially refills), or duct tape rolls, or… whatever. Those cardboard cores are almost useless by themselves. Here is a way to make them into boxes.

They are

• stackable : two boxes of the same diameter may be stacked one on the other
• linkable : two cores of the same diameter may be linked together to get a “double-height”  (or triple, quadruple…) box.

At the very least, you will need two inserts and two lids. 

If you want to link two cores, print two inserts (one for each core) and a link.

There are currently three sizes, more will be added as I get them (or the relevant data) :

• 76 mm diameter, 3 mm thickness. That's the usual (duct, scotch) tape core ;
• 94 mm diameter, 2.5 mm thickness. I'm addicted to Rosa3D refill rolls, and it's the core size from those (I took the idea from nakwada's https://www.printables.com/model/983609-stackable-containers-parts-for-rosa3d-refill-core and went from there, re-designing everything) ;
• 102 mm diameter, 5.5 mm thickness. I had one FormFutura cardboard roll, ripped the flanks and that's the core I got.

Files are named “Couvercle” (top/bottom lid), “Insert” (insert) and “Lien” (link), with added external diameter and cardboard thickness. For example, Couvercle-76-3.stl is the lid for a 76 mm diameter, 3 mm thickness (usual tape roll). If there is some non-integer dimension, the dot will be replaced by a p : Insert-102-5p5.stl.

If you need other sizes, drop me a message, giving me the internal diameter of the cores, and the cardboard thickness (in millimeters, thanks).