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.
this post was submitted on 29 Oct 2023
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On rock or wood, it'd think it'd be cut with chisels, or some kind of hand tool, rather than any kind of machinist's tooling, but I'm not a mason or a woodworker. (Not a machinist either, I just like making stuff and like following the communities for different skills/disciplines)
Using a custom die is still technically machining. But I have no idea if you can die-sink natural rock...