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**truckster** · 01-05-2015, 11:01 PM

Did you center-punch the holes? It not only centers the bit, it gives it a small edge to bite on.

01-05-2015, 11:01 PM	#3
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,822	Re: Drilling Through Hardened Steel Did you center-punch the holes? It not only centers the bit, it gives it a small edge to bite on.