I am probably making too much out of this, but it is my first time and all
I am gluing up a turning block; sandwiching spalted maple between wenge.
What glue to use? Is PVA adequate, or polyurethane, or epoxy?
Yesterday I turned a plate that was simply taped onto the faceplate; so I
expect PVA will do fine, but I would rather benefit from other's experience
than my own.
You're right, you're making too much of it. PVA is stronger than the
wood itself, especially when you have such a large glued surface.
"We should be careful to get out of an experience only the wisdom
that is in it - and stop there; lest we be like the cat that sits down
on a hot stove-lid. She will never sit down on a hot stove-lid
again---and that is well; but also she will never sit down on a cold
one anymore." - Mark Twain
Sorry, when I first answered I failed to recognize that the wenge is
the source of your worry. I think that given the large glue area,
you'll be fine if you plane or sand immediately before gluing.
"The cheapest things in life are free."
PVA is fine- but one thing you need to keep in mind is that it's going
to need to fully cure. The first time I did this, I let it sit for
about an hour, and it delaminated on the lathe. Better to let it sit
with the clamps on for more like 24 hours.
On Wed, 15 Nov 2006 15:22:32 GMT, firstname.lastname@example.org (Doug Miller)
Yeah, but I was in a rush to play with my new toy, and I didn't have
any firewood or suitable branches around. Furniture is usually all
right to continue with after the glue has tacked, so I was foolishly
using that rule-of-thumb. Hence, the warning/reminder.
As others said PVA is fine ... but...
between the very stable wenge and the less stable maple you may get some
creeping, and if you end up with a fine reflective finish you may have a
slight glue line. Epoxy or cascamite would be better for that reason, but
they may blunt your turning tools a bit more.
Er, sorry, that is correct. I don't know if it is used in the US. It's a
white powder, mixed with water and sets rock hard. Has been used afaik for
50yrs for boat building, airframes, joinery, but probably old-fashioned now.
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