Rugged SD Card case

thingiverse

Edit: Added a new top, that fits better when using an o-ring seal. Inspiration from https://www.thingiverse.com/thing:1678678, https://www.thingiverse.com/thing:1322805, and 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. With inspiration from those STLs, I designed a new SD card case with the following features: * Thicker walls * Thicker top and bottoms * Groove for an 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 six SD cards and two 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. 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, use a suitable type of plastic, I prefer PETG or PC (I also have had good results printing it in Colorfabb XT-CF20 [Requires hardened nozzle]). Print with like six outline shells, six bottom, and top layers. To improve the ruggedness, you can do post-processing 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 one or two 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 too 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 too much, the cards can be stuck and in worst-case scenarios, the Micro SD can snap in half. The tolerances in this model work fine for me printed with PETG, PC, and Colorfabb XT-CF20 on a stock Original Prusa I3 mk2S.