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  1. arlieb

    Thread percentage vs broken taps.

    Ok, There are a few things that need to be ironed out first. 1- are you checking the concentricity of the tap in the tool holder or are you just mounting it and tapping? 2-Where are you getting the speeds and feeds for your taps at? 1a- your concentricity should be less than .001 2a- you need...
  2. arlieb

    Drilling into type 321ss

    Here is what I would use. Drill Kennametal Dynapoint with thru coolant. Kennametal Catalog # K210A07500HP Speed / Feed 270 SFM and .010 IPR This Sir is all you will need for tooling. Do not spot drill for the hole just drill it.

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