[Jewelry making - Article 00551] - Re: [Orchid] Arthritic shanks that don't stay closed.

[Bruce Holmgrain]

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>         Has anyone had any experience with the SuperFit rings
>     "Arthritic Shanks" not staying closed, and falling off the finger? 

    I installed a few of them before I realized that the entire shank
    acts as a spring. Obvious to others, I just hadn't given it any
    thought. The biggest problems seem to occur when installing a
    platinum Superfit in a small size. The platinum is not very spring
    like, and the small size narrows down the area of of the spring.
    Remember that any thin area will absorb any tension and any heavy
    area will not flex. This concentrates the tension on the available
    spring. 

    I won't use Superfit shanks on a lot of designs because of these
    limitations now.


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