Counter-bearing drag

[John Ross]

Where is the half round brass purchased?
John M. Ross
Windsor, Nova Scotia, Canada
jrpiano at win.eastlink.ca
----- Original Message ----- 
From: "Frank Emerson" <pianoguru at earthlink.net>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Friday, August 03, 2007 10:13 PM
Subject: RE: Counter-bearing drag


>I have encountered severe cases such as you describe, where no amount of
> lubrication would relieve the problem.  My solution  was as you described
> with a brass half round counterbearing.  However, I would not totally
> eliminate the felt, but select a thickness of felt that will only lightly
> contact the string.  I would also use a narrower width felt.  It doesn't
> take much to silence this tiny string segment.
> 
> Frank Emerson
> 
> 
>> [Original Message]
>> From: Jon Page <jonpage at comcast.net>
>> To: <pianotech at ptg.org>
>> Date: 8/3/2007 9:20:32 AM
>> Subject: Counter-bearing drag
>>
>> There is a S&S locally right on the water, well not really, water 
>> view/water front.
>>
>> There is noticeable and detrimental drag to a section in the high tenor.
>> I can move the lever almost '5 minutes' (clock index) before the tension
> drops,
>> conversely on raising. Needless to say, these notes are not stable.
>>
>> Short of replacing the wire in that section (complete restringing is 
>> not in the cards
>> for this family) could a thin brass strip be placed between the 
>> strings and counter-
>> bearing to facilitate the rendering of the strings. If not only a 
>> small curved segment
>> at the top edge of the felt.
>>
>> I plan to replace the strings on my next visit to their area
>> but thought this might be an expedient option.
>>
>> When restringing, I don't replace the counter-bearing as originally
> designed
>> with friction for the entire surface. I limit it to the top edge. My 
>> next one wil
>> have simply a half-round or half-oval with non-bearing felt between 
>> that and the agraffe.
>> -- 
>>
>> Regards,
>>
>> Jon Page
>>
> 
>