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  1. D

    Drilling Concentric Holes

    Thanks for all of the replies. I took no offense from any of the comments and I found them very helpful. I have not been active here for reasons that have nothing to do with the forum but rather my personal health. It is hell getting old.
  2. D

    Drilling Concentric Holes

    I want to thank all of you for your assistance. I have not been totally successful in my endeavor but that was certainly not the result of your inputs. I have drilled six of the holes somewhat successfully and five of the counterbores. I stopped on the last counterbore because the machine didn't...
  3. D

    Drilling Concentric Holes

    Thanks for your replies. I do believe you have answered my major questions. What I am missing is a centering drill. I have been attempting to do what you instruct but with a simple "small" bit followed by a larger; this sorta works but the bit tends to walk thus I loose the center. I'm going to...
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    Drilling Concentric Holes

    In response to your questions: I am a wood worker but I have started building a number if aluminum jigs. It seemed as though it would be the same as working with wood but it is not. I am using a Shopsmith Mark V Model 520 that provides a lathe, horizontal boring, vertical drill press and saw...
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    Drilling Concentric Holes

    I am a wood worker trying to work with metal (aluminum, actually). I need to drill a number of concentric holes and need some advice. Should I drill the larger hole first or the other way around? How do I keep the drill bit from running? I have drilled a small starter hole thinking that would...
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