Rugged SD Card case

Edit: Added a new top, that fits better when using a o-ring seal

Inspiration from
https://www.thingiverse.com/thing:1678678
https://www.thingiverse.com/thing:1322805
https://www.thingiverse.com/thing:1619362

Those are very good SD cases, but as an underwater and wildlife photographer I needed a rugged and weather resistant case, that can handle a splash into saltwater, heavy rain and dust, snow and so on, so with the inspiration from those stl's I designed a new SD card case with this features:
* Thicker walls
* Thicker top and bottoms
* Grove for a O-Ring seal (fits a 40x3.5mm o-ring seal)
* Hole in the top for attaching a nylon rope for attaching a carabiner or whatever, so I can attach the case to my body or camera bag.
* slots for 6 SD cards and 2 Micro SD cards
* Room in the top for some foam padding

For best ruggedness print the top at 0.1mm resolution and the bottom with either 0.1mm resolution or as a dual process print where the print prints at 0.2mm up to the threading and 0.1mm from the start of the threading and up. Use 50% honeycomb infill for the lower parts of the base and the top, and 100% infill for the threaded parts of the base. To make it rugged it is important to use a suitable type of plastic, I prefer PETG or PC (I alos have had good result printing it in Colorfabb XT-CF20 [Requiers hardened nozzle]). And print with like 6 outline shells, 6 bottom and top layers.

To improve the ruggedness you can do post process where you spray the parts with a plastic filler spray (e.g.. Steel Plastic Spray), let it dry, sand it down with semi fine grit sandpaper (eg.180 grit) and repeat the process 1 or 2 more times, this glues the build lines together and fills any holes or cracks in the shell, and complete it with a spray paint of desired color.

If you print this part with a plastic that shrinks/warps when cooling, or if your printer tolerance is not tuned, the SD/micro SD slots might be to tight, if so do not use the case, rescale it according to your printer and the plastic type you print with. The SD / micro SD cards should be easy to insert and remove from the slot. If the shrinkage is to much the cards can be stuck and in worst case the micro SD can snap in half. The tolerances in this model works fine for me printed with PETG, PC and Colorfabb XT-CF20 on a stock Original Prusa I3 mk2S

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