There are times in a man’s life when he needs to drill a square hole through an 8mm thick piece of steel. If that man doesn’t have one or two thousand dollars to spend on commercial tooling to do this ...

Suppose you need to modify an enclosure by drilling a hole in it to install a drain (or for some other purpose). How can you do this in a way that leaves a perfect hole with a minimum of work? First, ...

When you’re working with tools, if you need to make a round hole, you reach for a drill. If you need a square hole, you reach for a saw. But a new accessory called the Quadsaw lets your drill cut ...

I need to drill a 2” hole 4-6” deep into tops of vertical 6x6 deck posts. ( I’m installing steel top rail) Holes will hold 1-1/2” square vertical tubes. Horizontal 1-1/2” tubing will then be welded on ...

There are times in a man’s life when he needs to drill a square hole through an 8mm thick piece of steel. If that man doesn’t have one or two thousand dollars to spend on commercial tooling to do this ...

I watch this video and I can’t believe this kind of sorcery is happening: a drilling machine in action, creating square holes. Instead of using a regular circular motion, this thing just quickly moves ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

A hole is nothing. Or more precisely, it’s the absence of something—wood, metal, concrete, or any number of different materials. Since holes are nothing, why do we care about them and how to make them ...