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Thread: Defiance bending machine

  1. #1
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    Lightbulb Defiance bending machine

    WRONG VIDEO POSTED SEE POST # 3

    Impressive :

    This timber bend is being used used to manufacture wheels for a 77mm Krupp Canon from World War I.

    This bending machine is a Defiance machine dating back to the 1890s and is capable of bending up to 6 inches thick x 12 inches wide boards of timber! A rare machine to see in action, anywhere in the world.

    Last edited by Rum_Pirate; 05-19-2017 at 02:03 PM. Reason: WRONG VIDEO POSTED SEE POST # 3

  2. #2
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    St. Paul, MN, USA
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    Default Re: Defiance bending machine

    The way the air cylinder pulls on the compression strap and pushes on the end of the wood is clever. I doubt they used air cylinders in the 1890s, though.
    "For a successful technology, reality must take precedence over public relations,
    for nature cannot be fooled."

    Richard Feynman

  3. #3
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    Default Re: Defiance bending machine

    Sorry Keith, I posted the video that followed the one in meant to post by mistake.

    I meant to post this one of the 1890's Defiance machine :


  4. #4
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    Default Re: Defiance bending machine

    Quote Originally Posted by Rum_Pirate View Post
    Sorry Keith, I posted the video that followed the one in meant to post by mistake.

    I meant to post this one of the 1890's Defiance machine :

    I wasn't going to say anything, but those cannon wheels sure looked trapezoidal, to me.
    Rattling the teacups.

  5. #5
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    Default Re: Defiance bending machine

    Awww, the other one was cooler.

    Note the built-in fixture at either end that keeps the wood under compression.
    "For a successful technology, reality must take precedence over public relations,
    for nature cannot be fooled."

    Richard Feynman

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