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Drilling Question

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  • Drilling Question

    Why are the drills with shanks reduced to 1/2", in the 9/19" to 1" range, are called "Silver and Deming" Drills?

    What does silver have to to with it and what is deming?

    An inquiring mind would like to know. Thanks.


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  • #2
    Google is your friend

    This company began back in 1854, when Albert R. Silver and John Deming formed a company to make agricultural machines, although the "Silver & Deming" name does not date back that far. In the later history of the company, Emmor W. Silver was a principal; he was perhaps a son of Albert.

    They began making woodworking machinery in 1866 when the offered Dole's spoke-tenoning and felly-boring machine, patented Oct. 31, 1865. Silver & Deming was created in 1867 or 1868 after L. A. Dole had died, and Dole, Silver & Deming was renamed. In about 1874, Silver & Deming incorporated and became Silver & Deming Manufacturing Co. About the same time that Silver & Deming Mfg. Co. started, they began offering a line of hand operated blacksmiths drills, which eventually expanded into a line of power driven drilling machines. In 1890, the company reportedly split, with one part becoming Silver Manufacturing Co.

    Silver & Deming made a variety of machines that were primarily aimed at wheelwrights: hob-boxing machines, spoke-tenoning machines, etc.

    Silver & Deming apparently invented the large-size twist drill bit with a turned-down shaft so they can be used in a chuck smaller than the bit's cutting diameter. They did not patent this idea, so the idea was quickly copied by others, but these bits are still called "Silver & Deming drills".


    • #3
      Or on this side of the pond, often known as blacksmiths drills, never heard them refered to over here as Silver and Demming yet, but you never know.


      • #4
        These started out back in the days before there were any Jacob type drill chucks, the drills could be held in a collet and were an alternative to the Morse taper drills (or other tapers that my have been around in those days). they are a very handy item for drilling on a mill/drill because you only need one or two collets to cover a whole range of drill sizes.
        The shortest distance between two points is a circle of infinite diameter.

        Bluewater Model Engineering Society at


        • #5
          If you ever buy those Silver & Deming drills get ones with 3 flats ground on the shank so they cant spin in a drill chuck.

          1/2"collets dont work worth a crap so use a drill chuck and hog away.