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 ...

There are three tool options to consider when drilling large-diameter holes in thick steel: twist drill bits, hole saws and annular cutters. 1. Twist drill bits. Especially in steel thicker than ...

Long story short, HSS bits should be considered disposable bits best used for wood, plastic and soft metals. Moly drill bits work well with mild steel. Cobalt bits are expensive and best choice ...

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.

People have been working metal for so long that the list of tips and tricks ... 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 ...

They include over-sharpening, overheating the metal, and positioning it incorrectly ... However, it is possible to resharpen and salvage those drill bits, as so long as you avoid these sharpening ...