Durable drill bits can maintain the sharpness and cutting abilities over a long period. This is smooth and accurate to handle hardened steel since it can result in consistent and efficient performance ...

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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 ... you may be good, but [Jody] is better, and ...

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 ... there’s a good chance it’s going to kick back and give you ...