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4340 rolls

4340 rolls

4340 rolls

(OP)
Hi,

I have a set of corrugator rolls to make waves on pool walls.  My rolls are about 8" dia x 60" long.  The rolls flex in the middle. (0.006") Is it a normal situation?  I have others of 52" and .200" bigger on diameter and they flex less.  Could it be the difference or something is wrong with my rolls?

RE: 4340 rolls

The shorter rolls are almost 70% stiffer, plus they see less load due to their shorter length.

RE: 4340 rolls

Hupe,
Philrock is correct. I think this is why some roll makers design in a small increase in roll diameter toward the center of the length.  It offsets some of the deflection and adds s bit of stiffness.  You might check with the manufacturer as to whether this is the case with your setup.  

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