We spent 12 hours testing these drill bit sets. First, we used a drill press to evaluate them for drilling ability in ...

It turns out that a hot solution of alum (ammonium aluminum sulfate), which is available in the spice rack of your local supermarket, will dissolve the steel drill bit without reacting with the brass.

There are three tool options to consider when drilling large-diameter holes in thick steel: twist drill bits, hole saws and ... bore annular cutters can be used with hand-held drills, but they ...

Choosing the right drill bit is about saving your single most ... For drilling into metals such as stainless steel, your best bet is a HSS twist bit. High-speed steel offers greater resistance ...

So it’s always a joy to pick up a new trick, especially one as simple as putting a hardened edge on mild steel using a drill bit as a filler rod. This tip comes to us by way of [Jody], aka ...