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  1. #1
    Join Date
    May 1999
    Location
    Tooradin,Victoria,Australia
    Age
    69
    Posts
    11,919

    Post Sizing considerations for wood screws:

    Taken from the Shopsmith woodworking tip of the day.

    Sizing considerations for wood screws:


    PILOT HOLE DEPTH
    In Hardwoods - equal to length of screw
    thread
    In Softwoods - equal to 1/2 of screw
    thread length
    BODY HOLE DEPTH
    Equal to length of screw shank
    MAX. COUNTERSINK DIAMETER
    Equal to outside diameter of screw head
    MAX. OVERALL SCREW LENGTH
    Approx. 1/8" less than combined
    thickness of workpieces being joined
    RULE-OF-THUMB FOR SCREW STRENGTH
    A longer screw of smaller diameter is
    stronger than a shorter screw of larger
    diameter



    ------------------
    Ian () Robertson
    "We do good turns every day"

  2. # ADS
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    Join Date
    Always
    Location
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    Age
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  3. #2
    Join Date
    Nov 1999
    Location
    East of Melbourne.Vic. Australia
    Posts
    904

    Smile

    Good on ya and thanks. Great help for a bush carpenter like me! I shall save this and print it in letters large, and attach to a suitable surface in my shed where I can refer it before I start screwing (and don't edit this 'cause I'm dead serious!.
    Regards.
    John H.
    Jack the Lad.

  4. #3
    Join Date
    Jul 2000
    Location
    Drop Bear Capital of Gippsland (Lang Lang) Vic Australia
    Age
    70
    Posts
    6,522

    Lightbulb

    And more info......
    http://www.woodmagazine.com/woodbasi...outscrews2.htm
    http://www.woodmagazine.com/default...._47___71___100

    [This message has been edited by Iain (edited 10 July 2001).]
    Stupidity kills. Absolute stupidity kills absolutely.

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