[pianotech] hitch pin hole

[Delwin D Fandrich]

I haven't had it happen to me either but I've heard of it happening. Two
possible causes come to mind. You say it's an expensive grand so it probably
has a green-sand cast plate. Occasionally bits-as in very small clumps-of
sand break loose from somewhere and get into the casting. To me this seems
most likely. The other possibility is an internal gas (air) pocket. I'd
think you'd have discovered that the first time around, though.

 

ddf

 

Delwin D Fandrich

Piano Design & Fabrication

6939 Foothill Court SW, Olympia, Washington 98512 USA

Phone  360.515.0119 - Cell  360.388.6525

del at fandrichpiano.com  <mailto:del at fandrichpiano.com> - ddfandrich at gmail.com

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ed Foote
Sent: Saturday, December 03, 2011 5:49 AM
To: pianotech at ptg.org
Subject: [pianotech] hitch pin hole

 

Greetings,  

 

Three years ago, I had a hitch pin begin to give way in the plate of a
rather expen$ive grand. It seems that there was a pocket of something other
than cast iron at the particular spot (Eb55).   It was under warranty.
Factory recommendation was to install a larger pin, which I did while
accompanied by the dealer's technician.  Now, I get a call that the note is
once again totally whacked out and I fear that the pin is once again
beginning to lean into the string's pull.  I think the ultimate solution
would be to drill a new hole perhaps an inch farther distally and just avoid
the area.  Anybody else deal with something like this?  First time in 35
years I have encountered the situation.  

Thanks, 

 

Ed Foote RPT
http://www.piano-tuners.org/edfoote/index.html


 

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