[Jewelry making - Article 00533] - Re: [Orchid] Rolling mills square wire grooves

[andrew cooperman]

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    Hi Brian, I've often asked myself that question but have assumed
    that this is engineered in. A sharp square corner seems like it would
    be much more prone to generating the small cracks that grow if
    unattended into larger, deeper cracks and then eventually splits....
    It's like the rounded inside corners on cast iron castings. The wider
    surface spreads the energy out rather than funnel it in to one point. 


    This could, of course, be totally wrong. We've all pushed the wire
    mill a bit too much-- right before "finning" happens-- and then
    repeated this in a 90 degree turn, yielding truly square stock.... 

Take care,
Andy Cooperman
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