Clamping Pressure For Wood Glue

Too little pressure will fail to achieve any of these benefits.

Clamping pressure for wood glue.

Proper clamp pressure will also compensate for any imperfections between the two mating surfaces. Dale zimmerman of franklin international maker of titebond woodworking glues recommends 100 to 150 pounds per square inch psi for clamping softwoods and 175 250 psi for hardwoods. For softwoods pine poplar. When we tested one handed bar clamps issue 139 we found that they provided pressure just into the softwood range or a bit less.

Third it overcomes minor surface imperfections between mating surfaces. During extensive research they undertook on gluing and clamping pressure the only manufacturer s reference the folks at lowell thomas tool found was on the titebond website. Second as the glue releases moisture causing the wood to swell clamping overcomes this pressure and prevents the joint from opening up. Too much glue can cause glue run out problems that will likely cause other issues at the time of finishing the project.

In some cases where adhesive is only on one of the mating surfaces pressure also assists in transfer of the adhesive to the other face. Additionally consider how much the moisture in the wood will cause the wood of the joint to swell. The fine woodworking article also gave rough estimates of the average pressure various clamps are capable of producing. And fourth clamping holds parts in position until the glue cures.