Cardboard corners with integrated corner brace

thingiverse

I'm aiming for shelves that are precisely 2 inches deep, but past versions have fallen short due to errors in cardboard sizing or snapped 3D prints. To avoid these issues, I'm now designing the shelves without cardboard sides and instead using it solely for the shelves themselves. The 3D printed parts will provide vertical spacing, assuming I've accurately calculated the peg-and-hole dimensions. I haven't had a chance to print these designs yet, so I can't guarantee they'll work or fit together perfectly. However, I'm making them available here for easy download at the makerspace. A minor adjustment is needed - sometimes the pins require cleaning before fitting into the holes. The versions with small feet and holes (58 mm and 63 mm) have worked best so far. I also tried a square peg design but it didn't perform as well as the circular one. The peg measures approximately 6.8 mm in diameter, while the hole is around 7.0 mm. The 58 mm version provides a very close to 2 inches gap between cardboard layers. If you prefer more space above this limit, opt for the 63 mm design instead.