How do people cut sharp inside corners, like the triangles shown? This example is cut in stone but I have seen similar features on wooden building blocks.
How do people cut sharp inside corners, like the triangles shown? This example is cut in stone but I have seen similar features on wooden building blocks.
If we’re talking tight tolerance, you could custom broach it, use a wire EDM, a sinker EDM, or live with a small radius from whatever your smallest diameter endmill is.
For wooden building blocks with larger tolerances it’s a little simpler, likely a scroll saw or bandsaw.
Anyone else, please chime in if you know of additional options!
Can you wire-EDM natural rock? If this were a through-hole instead of indentation, I’d say using an old fashion file or a (mechanical) planer.
Sorry, I am stuck in the metals space and took this as a general question. For the specific situation above, it’s likely a chisel or some kind of masked abrasive blast