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Hi Gaston, I don't dare count all the holes I've drilled on SS thru out my life but it was a bunch. SS is very rpm sensitive. Since SS drills fairly well on the drill press with rapid tap or a couple other lubes it was nautral to try this method in the field with a drill motor. We smoked thru bits right and left. Tried all types of bits too. We still used alot of bits with standard HS bits being the best. Someone gave me a new Millwaukee 3/8" varible speed to use. I tried different speeds and could get the bits to last slightly longer but no cigar. From some reason I decided to try bumping the trigger to really vary the rpm while drilling with holding firm pressure but not heavy pressure. That worked very well. So I tried it on a standard 3/8" drill motor and it also worked there. Perfecting this method I found it was vary hard to describe but easy to show. Take the bit to about 500rpm (just guessing here) then let off the trigger until the bit just slows well, 100rpm?, then bump the trigger again. Keep doing this until the hole is drilled. No drill bit cutting fuild is needed and using HS drill bits, Dayton brand seamed to be the best. Using this method, drilling 1/4" SS, I could get about 25 holes from each 1/8" to 1/4" bit. Anything larger requires a pilot hole. T_Bone
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