We all know how drills work: this instrument with a special rotating head cuts holes where they are needed. There are many types of drills, that differ depending on the type of the material they are intended to work on. And, as we all know – drills make round holes only.
Still image from YouTube video.
But wait – what if we could drill square holes, right from the beginning? This is not possible, you say? Don’t be so hasty. With some careful mechanical engineering and interesting geometrical solution, plus some custom-made equipment, you can drill square holes instead of the round ones.
Watch the following video explaining in detail how such drill was produced. Note that the resulting hole has some round edges at the corners where it should be strictly square-shaped. As the author of this clever gadget explains, this could be fixed by using a more stable drill guide. Don’t forget to turn on captions or read the transcript when watching this video:
