1" Square Aluminum Extrusion Corner (No Supports)

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5334523.

This is corner adaptor for building a printer enclosure using 1" aluminum extrusion. It should be printed on its flattened corner so that all three legs are of equal strength and no supports are necessary. There is an integrated pillar support on the inside that adds a bit of strength and allows it to be supportless. The wall thickness is 3mm for strength, and it should also allow scaling for different extrusion sizes.