I am need to cut four 2" diameter holes in a piece of 1/2" thick 304 stainless steel. I have a adjustable single blade fly cutter with 0.242" center drill and a 3/4 HP drill press that can go from 3050 to 140 RPM. This is for a exhaust manifold header. I have heard of work hardening and it scares me. What to do and what not to do?
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