Reply by Rich

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Posted on Glue up pressure and number of clamps?????

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5527 posts in 1325 days

#1 posted 01-18-2018 06:01 AM

In theory: For the OP s cutting board, 18” long, say 1 1/2” thick, would make it 27 square inches of glue area. For an average pressure of 250 psi, you then need a total of 27*250 = 6,750 lbs clamping force. So about 12 F clamps (or 6 bar clamps).

Which would make it an F clamp every 1 1/2” ....... which seems over the top to me.

- unclearthur

You are aptly named. I’m a degreed engineer, and I have never concerned myself with square inches, PSI or any of that when gluing up a panel. Besides, to complicate matters, what if you used psi clamps (Ψ)? That would throw the psi WAAAY off. It’s a slippery slope. Tread carefully.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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