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Too much clamping pressure when using epoxies.

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Forum topic by pontic posted 02-13-2017 02:00 PM 362 views 0 times favorited 3 replies Add to Favorites Watch
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pontic

500 posts in 444 days


02-13-2017 02:00 PM

Epoxies shrink significantly when setting. So do aliphatic glues like tight bond. the difference is that there is much less penetration into the wood surface with epoxies. The epoxies have a better standalone strength(better in shear and more flexible). So they are good for loose or open joints. Too much clamping pressure in these situations I think, will work against me. As the epoxy sets and shrinks it pulls more into the opening and away from the wood. I seem to have better results with little or no clamping pressure in these situations. Am I way off base or not?

-- Illigitimii non carburundum sum


3 replies so far

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a1Jim

116566 posts in 3413 days


#1 posted 02-13-2017 02:37 PM

Hi Pontic
Actully Fine Woodworking did a test on different glues in different conditions with different woods, test included joinery that was too tight of joint, and too loose and they found Polyvinyl acetate outperformed even epoxies in every test.

-- http://artisticwoodstudio.com Custom furniture

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pontic

500 posts in 444 days


#2 posted 02-13-2017 04:05 PM

So good ol’ tight bond wins again!

-- Illigitimii non carburundum sum

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SuperCubber

1010 posts in 2120 days


#3 posted 02-13-2017 04:28 PM

Here are the results from the test Jim speaks of:


-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

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