Thread: Stabilising knots

Nice Work

I think Ca glue or even some epoxy can be used for stabalising knots look into this a bit deeper with a few searchers though memory is a bit rusty on this one

heres a starter

https://sawmillcreek.org/showthread....and-Wood-Knots

Regards Lou

runny super glue (cyanoacrylate). Not sure about Australia, but in Canada I can get super glue in 3 viscosities, "runny" as water, like thin syrup or like thick honey

The problem with knots is that they tend to shrink more than the surrounding timber...and then fall out. The glue should prevent the latter but won't prevent the former. This could particularly be the case with so called kiln dried timber, such as radiata pine.

But if the OP is using really sharp tools and takes their time, they should be able to cut their wedge mortise through a stabilised (or glued in) knot, which if it falls out later won't really matter, or can be repaired with a dutch man.
It might even pay to cut the knot out now and do a dutch man repair.

Originally Posted by ian

But if the OP is using really sharp tools and takes their time, they should be able to cut their wedge mortise through a stabilised (or glued in) knot, which if it falls out later won't really matter, or can be repaired with a dutch man.
It might even pay to cut the knot out now and do a dutch man repair.

Thanks all,

I'm definitely taking my time, mostly through having to keep the noise down so not to annoy the neighbours!

To make the mortices I'm clearing much of the waste using a brace then chiseling the rest. I'm taking my chisels up to 8k grit, then honing a bit on a strop so should be sharp enough.

As this is only my first workbench, and largely a exercise in joinery, it's not need to last forever though and as the bench dismantles any piece can be easily replaced.

I've never heard of a Dutch man so I've a bit of research to do.

Thanks everyone.

what is a dutchman?
see here https://en.wikipedia.org/wiki/Dutchman_(repair)
and here https://makezine.com/projects/dutchman-wood-repair/

Originally Posted by ian

But if the OP is using really sharp tools and takes their time, they should be able to cut their wedge mortise through a stabilised (or glued in) knot, which if it falls out later won't really matter, or can be repaired with a dutch man.
It might even pay to cut the knot out now and do a dutch man repair.

Yeah, more than anything I'm just saying to be aware of the potential for it.

If you only want a small quantity of epoxy for this job, Boatcraft do a sample Bote Cote pack. It's a really easy to use epoxy and for $15 you can't go too far wrong at all.

You could cut it out and glue another bit in - I assume that's a Dutchman.

You could make the wedges horizontal instead of vertical and not have to cut into the knot at all. Look better anyway in my opinion.