[pianotech] Slipping Becket

[Dean May]

It is amazing what CA can do to solve all kinds of problems.

 

Dean

Dean W May                        (812) 235-5272 voice and text

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From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ryan Sowers
Sent: Friday, January 27, 2012 12:30 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Slipping Becket

 

How about just roughing up the last couple of inches of the string with
sandpaper to give it a better grip. I would suspect some kind of
contamination on the pin with a lubricant is the problem. A drop of thin CA
glue in the becket hole would probably fix it, but this may irrevocably
offend one's craftman sensibilities. It seems the issue is lack of friction,
so anything to increase it should be effective. 

I had a string loop on a harpsichord that was slipping, and the tiniest drip
of CA fixed it, and months later it is still holding fine. It beat replacing
the string!

Ryan Sowers

On Fri, Jan 27, 2012 at 7:11 AM, David Love <davidlovepianos at comcast.net>
wrote:

I have an interesting problem with a Yamaha C7 c 1980.  Nickel pins.  There
is one pin in which I can't get the becket to not slip and be pulled through
the pin.  Interestingly I've tuned this piano many times.  At this most
recent tuning I was going over the tuning and noticed that one unison (high
treble) had slipped considerably.  My first thought was that I had for
skipped it somehow in my sequence.  But as I pulled it up to pitch again it
simply continued to slip back. I realized that the becket was moving so took
off the string, cut off the old becket and reinserted the string with a
longer becket.  This one slipped as well.  Since the string spanned two
notes and was high up in the piano I decided to leave it until I could
decide to either replace the tuning pin or figure out exactly why this was
happening.  I've avoided nickel tuning pins for various reasons (mostly
looks and tuning lever feel) when possible but haven't encountered something
like this.  There is clearly something about the pin which is causing this
to happen but I'm not sure exactly what that is.  Thoughts?

David Love
www.davidlovepianos.com







-- 
Ryan Sowers, RPT
Puget Sound Chapter
Olympia, WA
www.pianova.net

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