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 ...

The least expensive twist bits are made of high-speed steel (HSS), and these basic bits are just fine for most metal-drilling ...

Half an airplane on the wall, a ten-foot metal dragon, and a full-blown recording studio might not scream “manufacturing efficiency,” yet Marathon Precision proves otherwise. Here’s how forging, ...

But when a drill bit breaks off flush in a hole, there aren’t a lot of options ... will dissolve the steel drill bit without reacting with the brass. Aluminum is said to be resistant to the ...

Each bit features a split-point top, which makes starting holes easier. The M35 alloy bits are made from an alloy of steel ...

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 ...

Add articles to your saved list and come back to them any time. Red Metal’s first scout diamond drill hole at its Bluebush silver-lead-zinc prospect in northwest Queensland has pointed the ...