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Re: [BKARTS] Paper Drill -- make your own--revised



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Note corrections marked with an asterisk below

>This home-made paper drill works very well. To make it one needs a lathe and
>some machinist skills. To use it requires a drill press and virtually no
>skill.
>    The drill has two parts: the drill proper, and an aluminum cup which
>catches the chads.
>    Take a piece of 1/2 inch diameter drill rod, 3.625 inches long. Chuck in
a
>lathe and face both ends, to bring the total length to 3.5 inches.
>    1.812 inches from one end, cross drill a .375" hole
>    Chuck from the other end. Center drill. Drill a .234 inch diameter hole
>until it breaks through into the cross hole. Ream to .250 inch diameter
>    Using a sharp tool, turn the outside diameter to .265 inch diameter for a
>distance of one inch.
>    Center drill the .250" D hole until the edge is sharp. *Touch up the
outside diameter with a fine file.
>    Re-ream to .250"
>    This completes the drill proper.
>    To make the aluminum cup, chuck a piece of 1.500" diameter aluminum so
>that 1.75" protrudes from the chuck jaws.
>     Center drill and drill .484 inch diameter 1.625" deep.
>     Ream to .500 inch diameter.
>     Bore a cavity 1 inch deep and 1 3/8 inch diameter.
>     Cut off to 1.500 inch length.
>     To improve its appearance (but not its utility), reverse the cup in the
>chuck and bevel the end of the cup which has the 1/2" hole. The angle of the
>bevel does not matter, but 30 degrees looks fine.
>     This completes the aluminum cup.
>     Using Locktite (any grade), assemble the cup on the drill so that the
>cross drill just clears the inside bottom of the cup.
>     Chuck the 1/2"D end of the drill in a drill press 1/2" or larger chuck.
>Let the top of the cup touch the bottom of the chuck so that chads do not fly
>out.
>     Place a piece of wood (end grain holds up longer) on the drill press
>table. Place a stack of paper on the wood. Clamp down the paper near where
you
>want the hole to be. Drill at about 200-300 rpm. Chads will flow out of the
>cross drilled hole into the cup. When the cup is full, unchuck the drill and
>empty the cup.
>     Don't worry if the drill turns straw color after some use. If it turns
>blue, the *rotational speed of the drill is too high.
>     This drill could be hardened and tempered*, but I have found that it
works very well in
>its annealed state.
>     If you want a larger or smaller drill add or subtract the same amount
>from the diameter of the 1/4" hole and the 9/32" outside diameter*
>     If this description is not clear, send me a self-addressed envelope and
I
>will send you a mechanical drawing. Contact me if you have questions.
>Rupert N. Evans, 101 W Windsor Rd., Urbana, IL 61802-6697 217-337-7833
*(summer address)
>
>Rupert N. Evans
>501-391 S LaPosada Circle
>Green Valley, AZ 85614
>520-648-8365
>Author of Book-On-Demand Publishing
>I love to print and bind books
>
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>            BOOK_ARTS-L: The listserv for all the book arts.
>      For subscription information, the Archive, and other related
>            resources and links go to the Book_Arts-L FAQ at:
>                      <http://www.philobiblon.com>
>
>        Archive maintained and suppported by Conservation OnLine
>                    <http://palimpsest.stanford.edu>
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Rupert N. Evans
501-391 S LaPosada Circle
Green Valley, AZ 85614
520-648-8365
Author of Book-On-Demand Publishing
I love to print and bind books

             ***********************************************
            BOOK_ARTS-L: The listserv for all the book arts.
      For subscription information, the Archive, and other related
            resources and links go to the Book_Arts-L FAQ at:
                      <http://www.philobiblon.com>

        Archive maintained and suppported by Conservation OnLine
                    <http://palimpsest.stanford.edu>
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