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aminhas14-Alexandrite
14-Alexandrite
Apr 9, 2020 8:42 PM UTC
Question

Need Help

Hello  All,
                     Hope all is well; I need to know how to calculate the Rope wires core and strands wires dia the outer dia is .0195" I have attached the picture for references.

With Best Regards,

Adnan

4 replies

VladimirN24-Ruby IV
24-Ruby IV
Apr 10, 2020 6:34 PM UTC

Your message is missing an attachment.

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aminhas14-AlexandriteAuthor
14-Alexandrite
Apr 12, 2020 4:21 PM UTC

Sir,

      sorry now I was attached please check

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Pettersson15-Moonstone
15-Moonstone
Apr 23, 2020 1:39 PM UTC

Draw it in the Sketcher and measure?

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    KenFarley
    KenFarley21-Topaz II
    21-Topaz II
    Feb 11, 2025 5:49 PM UTC

    Let's say we have N wires around the core, outer diameter of bundle is D.

    Assumed outer strands are all touching adjacent outer wire, plus touching inner "core" wire.

     

    Let's say outer strands have diameter B, inner core is diameter C.

     

    Geometry shows the following two equalities:

     

    D = 2B + C

    B = (C X SIN(180/N) / (1 - SIN(180/N))

     

    For a given D, you can solve for C, which is algebraically not so tidy, but given by:

     

    C = D / ((2 X SIN(180/N) / (1-SIN(180/N) + 1)

     

    For your given example, this yields C = 0.0506, B = 0.0722

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