[CAUT] [pianotech] Shank glue

[David Skolnik]

Sorry if this question demonstrates adult ADD: Are these glues 
(Assmbly 65 & Tightbnd 50) replacing hot hide in traditional 
wood-shank assemblies?  If it's been discussed, please just direct me 
towards threads.
Thks
David Skolnik



At 12:59 PM 5/8/2012, you wrote:
>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