[Jewelry making - Article 01147] - Re: [Orchid] Making large silver granules

[Dave Arens]

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    Hi Larry, If you want to melt jump rings to make granules here's a
    way to figure the  size of jump ring to use. 

    1. Calculate the volume of the granule. 4/3 times pi times the
    radius of the granule cubed. e.g.. 3 mm granule, 3/2= 1.5, 1.5 x 1.5
    x 1.5 = 3.375, 3.375 x pi = 10.6, 4/3 x 10.6 = 14.14 cubic mm. 

    2. Select the wire to be used to make the jump rings. e.g.. 16 ga
    (1.29 mm). 

    3. Find the length of  16 ga wire that'll have a volume of 14.14
    cubic mm. e.g.. pi x radius squared x length = volume.  1.29/2 =
    .645, .645 x .645 = .416, .416 x pi =1.307mm. 14.14 /1.307 = 10.82
    mm. A length of 16 ga wire 10 82 mm long will have a volume of 14.14
    mm. 

    4. Find the size jump ring that has a circumference of 10.82 mm.
    e.g.. 10.82/pi =  3.44 mm.  A 16 ga jump ring 3.44 mm in diameter
    will have a length of 10.82 mm & a volume of 14.14 cubic mm. 

    If you get real technical about these calculations the volume will
    be off a little, but I doubt anyone will notice unless you're making
    granules for NASA. 

    The methodology can be used for any size granule & any size wire. 

Dave 


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