Challenge Coin Hinged Gift & Display Box

This is a gift and display box for 51mm challenge coins (or maker coins) with a parametric hinge. The lid is split by a smaller parametric hinge so it folds back into a display stand that displays the coin at a 45° angle.

I have included the Fusion 360 archive file and .step file if you wish to modify the cavity for a smaller or larger coin.

Print instructions

Nozzle diameter and layer height impacts how tightly the lid fits into the box. Printing these quickly with a 0.6mm nozzle and 0.3mm layer height works but the lid fit is extra tight and requires some prying to open. If you want to print it with larger layers or nozzles, you may need to adjust the lid or add a deeper fillet or chamfer.

Print at 0.1mm or 0.15mm layer height if you find the hinges are weak or loose–especially if you modify the model to increase tolerances.

Text looks great on the lid, but requires perfect first layers. If you add text with a lot of smaller pips inside letters (e.g., A, P, O, R) you may need make adjustments. Use slower print speeds for the first few layers–or something like Magigoo adhesive–to prevent those pieces from coming loose and causing problems.

The hinges have a tolerance of 0.15mm, so it's tight. Test your printer with a tolerance test gauge like this one:

https://www.makersmuse.com/clearance-and-tolerance-3d-printer-gauge

If the hinge (or a test print) fuses at 0.15mm, use the included Fusion 360 archive file to adjust the hinge. The hinges are strong so they should survive if you need to break some light fusing within the hinge.