More on "The Piano Exploded"

[Alan R. Barnard]

Welding ... very, very, very bad. Do not do, do not let anyone else do. Never, ever ... UNLESS ... well read on ...
The bolt that knits is from Lock-n-Stitch. Go to their website http://www.locknstitch.com/ and look for a video on the expansion and contraction of metals. You will learn a lot and when you see it, you will say, "well that just makes absolute sense". You CAN weld cast iron but only if you heat the whole piece to very close to the weld temperature in the first place and then use a controlled heating and cooling process. Do not try this at home.
Some plates have been successfully (if not artistically) repaired with steel struts bolted on through drilled holes.

Alan Barnard
Salem, MO
Joshua 24:15






Original message
From: "John Ross" 
To: "Pianotech List" 
Received: 02/08/2007 4:06:24 PM
Subject: Re: More on "The Piano Exploded"


I am tempted to believe the plate was not repaired properly.
I know that there are repaired plates around that have no problem.
Some are welded, and some repaired with, a kind of bolt that 'knits' it together.
I have information on the knitting process somewhere.
John M. Ross
Windsor, Nova Scotia, Canada
jrpiano at win.eastlink.ca
----- Original Message ----- 
From: PIANOTECHNICIAN at aol.com 
To: pianotech at ptg.org 
Sent: Thursday, February 08, 2007 2:57 PM
Subject: More on "The Piano Exploded"


The head of operations should have told the customer that the job couldn't be done unless the plate is replaced with a new one. Period. Take it or leave it.
 
Jesse Gitnik
NYC
Since 1980
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