The Science Behind Clamps - How Much Pressure? How Many? What Type?
Jonathan Katz-Moses Jonathan Katz-Moses
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 Published On May 17, 2020

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In This week’s woodworking skill builder we’re talking about clamping pressure, what types of clamps I use and where I get them. We go over the formula for clamping pressure and how many to use on different types of wood. Links, different types of wood psi needed and formula below. I really can’t wait to see what you create! Let me know what you’d like to see next. Thanks for watching! Please like, comment and subscribe. Cheers!
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Links, Formula and Types of Wood PSI Needed Below:
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Clamps Main Page( qty discounts are big fyi): https://lddy.no/m61p
Parallel Clamps: https://lddy.no/m61q
F-StyleClamps (bar clamps): https://lddy.no/m61s
Pipe Clamps: https://lddy.no/m61u
Bottom Line: Use More Than You Need. Don’t Get Hung Up On Trying to Calculate to Use the Least Amount. More Clamps, Less Stress
Formula:
(Glue Surface Area X PSI Needed) / Clamp PSI = Clamps Needed (Then Divide By Length of Clamping Pressure at Glue Line)
¼ Sawn First # in PSI and Flat Sawn 2nd # in PSI
Pine: 150 , 300
Cherry: 250, 500
Walnut: 300, 600
Oak: 450,900
Maple: 600, 1200
Link to Roman Rabiej’s Paper https://www.semanticscholar.org/paper...
Fine Woodworking Article by Roman Rabiej: https://www.finewoodworking.com/2007/...
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