I am having extreme problems drilling 316L Stainless no matter what kind of speed and feed no matter what kind of drill (hss, carbide, cobalt, etc). I seem to break the drill. The holes are .750 through holes. I have tried chip break, peaking, etc etc. seems like nothing helps. Also on the machine im using i do not have through spindle coolant just external. Its a 40 taper with 7.5 hp. Any help would be greatly appricaited.
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