4Pcs 45deg, 4Pcs 135deg 2020 45 Degree Angle Bracket 20 Series Aluminum Extrusion Corner 45° Joint Connector Brace for T / V Slot 135 2040 20/20 Extruded Aluminium Profile

I use extruded aluminum for a lot of projects and most of the time 90’ corners are required, but once in a while I need something with an angled corner. I was using hinged connectors, which are still helpful for angles other than 45 degrees, but these are much more stable and accurate for a basic 45’ angle. These connectors are just as solid and strong as the 90’ connectors that I use.

The hardware looks good and is as solid as any cheap generic stainless. The 45 degree brackets are thick, and cut squarely and smoothly from aluminum extrusions. However, the 135 degree brackets are clearly cast. They have the characteristic pebbled finish of low-quality die castings, and while they look good enough and are fairly strong, they certainly will not have the strength of extrusions. They also will likely fail suddenly instead of bending like extruded sections would. I would not recommend these if you need strength or cosmetics, since the two opposing angles don’t match.

I didn't think too much about the screw holes when I purchased these because normally I mount other things in the corners of right-angle extrusions that add rigidity. In this case, it was just the brackets, and so twisting occurs. I could drill and tap extra holes myself, but that's a fair amount of work, and I would have to buy the correct size tap. The only other idea I have is to 3d print extra side support brackets. Overall, I probably would recommend looking for a more rigid solution.

I'm trying to put together a simple desktop CNC with a box full of extrusions I have left over from projects, and these seem like the perfect brackets to give it some rigidity. If you just attach beams to each other at 90 degrees it will not be as solid as if you brace them with a beam at 45 degrees, which I did in the photo.I made 2 of these for the Z carriage and let me tell you they are really solid, plus there is another whole set of 4 if I need them for example to brace the Z on my 3D printer.They also come with a generous supply of narrow and wide T-nuts and M5 bolts, the wide nuts are great because they don't rotate while you are trying to tighten them down.Very pleased with these brackets, good even black finish and very strong.

These are handy brackets for attaching aluminum extrusions such as 2020 at 45 degrees. The 135 degree angle is the complement of 45 degrees so you can brace the angle in either direction.Easy to use, quality seems good. These brackets are never especially stable by themselves but as you add more and more bracing things tighten up nicely.