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Drilling Stainless !


Snoozer
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HSS is fine, but the killer with stainless is work hardening. Never let the bit skid on the work or you'll harden the S/S & burn the drill in a moment. You MUST use plenty of down pressure to make sure the bit actually cuts. Do that & any good (SKF/ Dormer etc) properly sharp HSS drill will do the job fine for a few holes. Use a pilot just larger than the web of the drill (around 4mm for a 11mm drill). (Did I mention keep up the downpressure?!)

Production would be a different matter.

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