[CAUT] [pianotech] Shank glue

[Ron Nossaman]

On 5/8/2012 11:32 AM, McCoy, Alan wrote:
> Thanks Dale. I may give them both a shot to see what they are like.

Alan,
If you're talking about WN&G shanks, I wouldn't. They went to the CA 
because of something I talked to Bruce about when the carbon fiber 
shanks first appeared. CF doesn't change dimension with humidity 
changes, wood moldings do. So the odds of putting the two together with 
a woodworking glue and getting them to stay there through a few years of 
the humidity swings a lot of us experience through the year isn't a good 
bet. The glue doesn't bond to the CF, and you only get the mechanical 
"tooth" holding it there if you rough it up adequately. Apparently, 
enough hammers fell off after installation that they went to the CA.

Incidentally, Assembly 65 is RF response quick cure (or heat by other 
means) too.

I've been using some of Dale's Titebond 50, and like it for some things. 
It seems to require somewhat less clamp time before you can get on with 
cutting and shaping a rough glue-up than does Titebond original. That's 
good for the pathologically impatient, like me, but it's much harder to 
control under the clamps. The TB 50 tends to squirm and skate much worse 
than the TB original, so it requires more attention and constraint. I 
haven't used it for lamination of curved stuff yet, so I don't know 
exactly what to expect there as far as safe cycle time.

Both dry harder than TB original, with the Assy 65 herder than TB 50. 
Both look like first rate glues, depending on your use, needs, and habits.

Ron N