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Thread: (Re)Produce Accurate Arcs

  1. #1
    Join Date
    Jul 2008
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    Alexandria, Virginia
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    1,071

    (Re)Produce Accurate Arcs

    This is something I saw on one of the Blogs I frequent:

    (Re)Produce Accurate Arcs

    Sometimes you can make a serviceable arc with just a couple of nails and a thin piece of wood, but what if you need to exactly replicate an arc or produce an arc of a known radius? You break out Hoyle’s Acu-Arc adjustable ruler.



    The Acu-Arc ruler lets you determine the radius of existing curves, produce arcs of a known radius, and find center points of curves and center lines. You can adjust the 12″ flexible edge to reproduce curves with a 6-3/4″ to 200″ radius, or a 17mm to 500cm radius in the metric model. A sliding knob locks the curve in place, and a handy scale lets you read or set the radius of the arc.

    Hoyle makes the Acu-Arc ruler with plastic that’s rugged enough to stand up to everyday use, but it apparently bursts into flames or something when hit by direct sunlight, according to the manufacturer’s all-caps warning: “KEEP YOUR ACU-ARC RULER AWAY FROM DIRECT SUNLIGHT!”

    The Acu-Arc adjustable ruler runs between $35 and $50

    Acu-Arc Adjustable Ruler [Hoyle]



  2. #2
    Join Date
    Nov 2006
    Location
    Houston, Texas
    Posts
    2,323
    Hi Frank ,
    Thank you for sharing this tool with me. I was once asked how to find the radius with a mere segment of an arc. I did not know. It would be for me a seldom used tool but absolutely priceless when I do need it. Thanks again.
    Shaz
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    Shaz
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  3. #3
    Join Date
    Jul 2008
    Location
    Alexandria, Virginia
    Posts
    1,071
    My pleasure Shaz. Nice is also the repeatability of arcs. Like Ron Popeil says "Set it and forget it."



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