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    Threadmilling 4140 hardened steel

    The material is through hardened.
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    Threadmilling 4140 hardened steel

    here's the scoop, I'm threadmilling a 5/16-18 bind hole .4375" deep. My cutting parameters are rpm 1600, feed 2.0, and stepover of .001 per pass. I am taking a total of 45 rough passes, with 2 finish and spring passes. The problem is that it will cut one thread fine but 4-5 parts later the...
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    Indexable drill in aluminum

    I appreciate all of the responses. Will give another go at it tomorrow. I'll try comping the tool first.
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    Indexable drill in aluminum

    https://www.ingersoll-imc.com/product/6108592?quick-search=6108592#!OperatingGuidelines_HtmlContent
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    Indexable drill in aluminum

    Why would i want to compensate the drill to cut off center? I'm going to sweep the holder tomorrow to ensure its cutting on center.
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    Indexable drill in aluminum

    I am running into problems with my 1.5" indexable drill. The machine i am running the part on is a okuma genos L3000 (lathe).The parameters that I am currently running is RPM 1100, Feed .002" per rev and pecks at 1.0". The drill is cutting oversize by .02", what could be causing this issue. The...
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