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<p>[QUOTE=&quot;GDJMSP, post: 8092108, member: 112&quot;]That&#039;s about it in a nutshell.</p><p><br /></p><p>I&#039;m just using this pic below as an example of the idea you&#039;re expressing. </p><p><br /></p><p>If I remember what I&#039;ve read about it correctly the base of the the dies, and the press, were &quot;keyed&quot; kinda like what you see in this pic to hold them stationary and prevent them from twisting or turning. Not like this exactly, but in a similar way. And on the bases, not the top like this. ( what you see in the pic is a hub (L) and a die (R) )</p><p><br /></p><p>[ATTACH=full]1406490[/ATTACH] </p><p><br /></p><p><br /></p><p>Over time the key slots on the press, and at times the dies too, would wear from the repeated pressure and get a bit bigger, wider if you will. This would allow the twisting to occur at the time the pressure was highest. And the metal did not begin to flow until the pressure was high. And as it increased to its highest it would twist a bit more, causing the effect we see.</p><p><br /></p><p><br /></p><p><br /></p><p>The reason the twist effect did not occur in the devices is because the entire die would twist moving the devices as a whole, and the metal would be moving/flowing in a vertical direction to fill the holes in the die, not moving/flowing sideways/horizontally as the metal of the fields. That&#039;s why we don&#039;t see a shearing/twisting effect on the devices.[/QUOTE]</p><p><br /></p>

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