12 Tips for Drilling Holes in Metal

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Drill at a Slow Speed – The faster a bit spins, the hotter it gets. And heat dulls bits quickly. In general, it’s a good idea to drill through metal using as slow a speed as possible. Hard metals like steel and larger drill bits require even slower speeds. With a small twist bit (1/16 in. to 3/16 in.), you can drill through most metals at 3,000 rpm. For larger twist bits (11/16 in. to 1 in.), 350 to 1,000 rpm is recommended.

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