Comments by "Paul Frederick" (@1pcfred) on "Best Drill Bit Set? Hilti vs Milwaukee, DeWalt, Bosch, Bauer, Lenox, Irwin" video.

  1. You could run a 1" drill bit about 400 RPM into wood. 382 RPM would be spot on 100 Surface Feet per Minute (SFPM) peripheral speed. But you're only drilling pine so a bit more no big deal. Here's the formulas for calculating SFPM SFPM=( PI * DIA. * RPM) / 12 and more useful SFPM / (PI * ( DIA / 12)) = RPM There you can plug in DIA and SFPM and get the RPM The first one you have to keep guessing. But the second one is harder to calculate. Still nets you your answer right off though. You always know tool diameter and target surface speed. You just want to know how fast to run.
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  2. Yeah 7X faster than what? A woodchuck?
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  3. I thought of a Project Farm video recently that I'd like to see. Todd used to do videos where he'd try different stuff as crankcase oil to see what'd happen. I'd like to see what cutting fluid is like as crankcase oil. Would the engine cut itself apart? Try that nasty pipe tapping fluid too.
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  4. He could have run higher RPM for better chip ejection. I calculated 1" diameter bits can run 382 RPM to get 100 Surface Feet per Minute. So 250 RPM is pretty slow. You could probably run even faster in soft wood. But by running slowly maybe you exaggerate the drilling speed difference? Which makes it more for us to watch. Bits with snails suffered a lot with slow RPM too. The snail is the screw part of a drill bit.
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