Are there any drill bits that are especially good for drilling through hardened steel? I bought a Dewalt 5/32 bit to drill with, but, it barely makes a mark.

G83peck drilling cycleexample lathe

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The Q2. tells the machine to drill the hole in 2mm steps. After each step it retracts a small amount to break up the chips from the drilling.

G83peck drilling cycleexample

This simple part has four M12 holes drilled countersunk and tapped. The datum is the centre of the part so the holes positions are.