Epoxy Bridge repairs

[Carl Meyer]

Thanks, Joe, for that info on epoxy.  It's hard to get valid info about some
of these products.  I plead guilty to suggesting clamping.  So, would it be
okay to clamp only enough to get the pieces to their original position? Or,
would you think you could use another glue and clamp it tight?  Like tite
bond?
Of course a warped piece is risky in any situation.

Regarding CA,  I recall when the stuff first came out.  I think it was in
the sixties.  It was called "Eastman 910"  The purpose of it was to attach
accelerometers to metal to test for vibration.  I vaguely remember  someone
saying at that time "It's only temporary and will let loose in 6-9 months."
I'd thought that maybe the newer formulations had eliminated that.
It's very difficult to attach accelerometers and not have the signal be
compromised by the attachment material.

I recall you mentioning the Lord Corp E552 epoxy.  I wasn't able to find
them on the net or a supplier.  Have any suggestions as to source and specs?

Thanks

Carl Meyer  Assoc. PTG
Santa Clara, California
cmpiano@attbi.com



----- Original Message -----
From: "Joseph Garrett" <joegarrett@earthlink.net>
To: <pianotech@ptg.org>
Sent: Tuesday, January 01, 2002 4:16 PM
Subject: Epoxy Bridge repairs


> All,
> Several have suggested "clamping" the epoxy! I strongly suggest that, if
you
> want a failure, go ahead and clamp it! The only failures I've ever had,
was
> when I attempted to clamp a warped, (read split), bridge while using
epoxy.
> Epoxy is a CO-hesive substance NOT an AD-hesive substance. ie is bonds
> better with itself, in volume, than with other substances. There are some
> epoxies that are meant to be "clamped". The West systems ADhesive epoxies
> are in that group. These are very specialized epoxies. Personally, I find
> trying to get clamps in the proper positions on a bridge, is really
> difficult and falls into the "make work" category.
> An item I forgot to mention, in my last post, was the use of dental
scrapers
> to the fine cleanup of the pin/termination point(s) are really the way to
> go.
> IMHO CA glue has no place in a piano, except for a last ditch effort on a
> defunct pin block. CA glue has a nasty habit of breaking down over time. I
> did the research and found this to be true. (Flame suit zipped tight!)
> Regards,
> Joe Garrett, RPT, (Oregon)(Go Ducks!)
>