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Old January 12, 2019, 08:27 PM   #48
hounddawg
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Join Date: March 1, 2009
Posts: 2,306
Quote:
the reason for it is shown clearly by Metal god's photos. It's that crack of light that appears due to the resizing force already stretching the press frame
if the press is standard (gray) cast iron it will neither stretch or bend even .001 without breaking. That is just the nature of cast iron, tough and rigid as heck. My opinion is any stretch or flex on a press will occur in the linkage at the pivot points. Probably a free or close running fit tolerance on the holes and pins. The two linkage arms on a RC are held on by nylok nuts. The top left arm pin is a hollow pin, I wonder if that is the weak link and designed to flex when x amount of stress is put on the frame to prevent it breaking.

But the main point is cast iron is not renowned for its flexibility or ductility
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Last edited by hounddawg; January 12, 2019 at 08:39 PM.
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