Key Holder/Quarter Holder

thingiverse

This is a straightforward key holder with an added bonus of a quarter holder to ensure you always have a quarter for Aldi on hand. Most of it was designed using Fusion 360 and the STEP files are provided, printed in PLA at 100% fill, and the holder turned out to be plenty strong. You will need to print two key holders. The choice is yours: you can opt for two smooth ones, two textured ones, or one of each - they're reversible, so it's up to your preference. I recommend printing one of each, as this way you'll easily be able to identify which way the holder is facing. The keys are held in place by 3/8" aluminum screws posts. You can use shorter or longer posts depending on your specific needs. If you don't frequently change your keys, it's a good idea to apply blue loctite to the threads to prevent the holder from coming apart in your pocket. The spacers serve primarily to ensure there's enough room for the quarter holder to slide between the opposite keys. It's also nice to be able to shim both stacks so they have the same thickness, though. I've only included 1mm thick spacers as I didn't want to create a customizer in openSCAD. If you need different spacer thicknesses, just adjust the Z scaling when printing. Here are two sources for the posts: https://www.menards.com/main/tools-hardware/fasteners-fastener-accessories/bolts/binding-posts-binding-post-extensions/3-8-screw-post-with-screw-1-pcs/p-1444440136664-c-19382.htm?tid=1045762145736923831&ipos=4 https://www.amazon.com/Aluminum-Chicago-Screws-Screw-Posts/dp/B003O5GXMM