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 ¼", ...

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I have tried to track down a 5" hole saw to make cutouts for 120mm fans. <P>The closest that I have been able to find is a 4.5" hole saw. Is this what you guys use? Would that work? <P>I have found ...

Almost any general-purpose twist bit will do a decent job of drilling holes in metal. In fact, most drill bits labeled ...