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    Worm Drive Bow Press

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    septua
    Tinkerer

    If there is a will, there is a way.


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    Posts : 63
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    Worm Drive Bow Press

    Post by septua on Sun Jan 25, 2015 3:45 pm

    This version of my bow press uses the same frame of the original but replaces the cam clamp design with an inexpensive ($29 U.S.) worm drive from Harbor freight. I moved the crank handle over to the right side and substituted heavy braided nylon cord for the metal cable. With an adapter an unmounted prod can be strung or an unstrung one can be measured for a string. It takes around 12(40-1) turns of the handle to reach brace and with a worm drive the handle can be released anywhere with no backlash.  The 2 pins are 1- 1/4” oak that go all the way thru the 4x4. This pic was taken in the kitchen because the lighting is more uniform.

    tom




    adapter


    Last edited by SEPTUA on Sun Jan 25, 2015 4:47 pm; edited 1 time in total (Reason for editing : format)
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    Gnome
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    Re: Worm Drive Bow Press

    Post by Gnome on Mon Jan 26, 2015 10:02 am

    Nice setup! Definitely more compact than the rig I built that pretty much dominates the middle of my shop floor.
    Gnome


    Last edited by Gnome on Mon Jan 26, 2015 10:06 am; edited 1 time in total (Reason for editing : me no make no sense)
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    septua
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 63
    Join date : 2012-12-02
    Age : 81
    Location : Ohio

    Re: Worm Drive Bow Press

    Post by septua on Mon Jan 26, 2015 10:25 am

    Gnome
    Thanks, have been using this setup for 2 years. This works in the vert or horiz position but obviously required some loop or attachment at the crossbow front.
    tom

    c sitas
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    Re: Worm Drive Bow Press

    Post by c sitas on Tue Feb 17, 2015 8:50 pm

    The nice part of this is-- no worry of a broken wrist because the handle slipped out of your grip.

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    Re: Worm Drive Bow Press

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