Cradling was: Epoxy Reinforcing of Action Parts

[Farrell]

Hi Bill. I understand now what you are trying to do. I've done all sorts of fun & useful things with epoxy, but I can't think of a single thing that you could do with epoxy to help you with a brittle beech jack.

I guess I'm just not too quick sometimes with humor. I indeed spent some bit of time wondering what kind of a nutcase would be taking an air nailer to a jack top!   :-(

Terry Farrell
  
----- Original Message ----- 
From: "Bill Ballard" <yardbird@vermontel.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Saturday, March 29, 2003 11:08 PM
Subject: Cradling was: Epoxy Reinforcing of Action Parts


>At 2:25 AM -0700 3/29/03, Dave Nereson wrote:
>Bending pins to center the jack in the rep. lever hole (other 
>alternatives are  to install a new jack and hope it's straight, or 
>plug the center pin hole with ??? and re-drill it, which I've never 
>tried.  Or put in a whole new wippen).  Yes, center pin.  By 
>vertical, I think he means centered in the window, as opposed to the 
>jack rubbing on the wippen because of a jack center pin hole drilled 
>crooked (or jack warpage, or sloppy bushing).

Thanks, Dave, for a great job of answering Terry's questions. You 
were right on the mark. (Including the humor about the air nailer. It 
was a pre-emptive joke. I figured somebody would suggest I was 
tapping the tops of the jacks too hard, so I tossed in a wisecrack 
about  the air nailer alot of us are stringing with now.)

When you rap the top of the jack (firmly supporting the body of the 
rep underneath the jack's pinning), the top nudges over because that 
rap has actually bent the jack's CP. The beech of these parts is so 
brittle that, the normally minor force required to bend the pin 
shears the jack instead of pending the pin. To center the jack in the 
rep lever's window, the jack pin still needs a slight bend. In this 
case I'll have to bend the pin before pinning the parts together.

SNIP