[pianotech] Knuckle Direction

[Paul Milesi, RPT]

I respectfully disagree.  During the downstroke of the key, a lot of the
weight of the hammer is on the knuckle/jack, and there is a need to minimize
friction.  Trust me, a player can feel this friction, especially if
regulation isn¹t perfect, e.g., if the jack is a little too far back.  When
the jack is returning to rest position, the weight of the hammer is on the
repetition lever, and any friction during return has no impact on touch.

As for the line on the Abel-type replacement knuckles, I can¹t remember
which direction it indicates, so I can¹t be of any help regarding that.

I seem to remember that this was discussed on the list sometime in the past
couple years and subsequently published in the Journal.  It¹ll be
interesting to see who weighs in this time around.  I, for one, wasn¹t on
the list at that time.

Paul Milesi, RPT
Washington, DC
(202) 667-3136
E-mail:  paul at pmpiano.com
Website:  http://www.pmpiano.com



From: Ryan Sowers <tunerryan at gmail.com>
Reply-To: <pianotech at ptg.org>
Date: Tue, 1 Jun 2010 13:02:15 -0700
To: <pianotech at ptg.org>
Subject: Re: [pianotech] Knuckle Direction

I would vote for orienting the nap for smooth jack return. So the nap would
be pointing towards the hammer. 

On Tue, Jun 1, 2010 at 12:57 PM, Dempsey Jr., Paul E <dempsey at marshall.edu>
wrote:
> OK, maybe just too much week-end or perhaps old-timers....
> 
> I am re-knuckle-ing a set of grand shanks. The new parts are of Able
> manufacture and have a pencil line on each.
> 
> Does this line face the flange or the hammer?
> 
> I know the line indicates the direction of the nap of the leather, but which
> way is preferable.
> 
> 
> 
> Paul E. Dempsey, RPT
> Piano Technician Sr.
> Marshall University
> Huntington, WV
> 304-696-5418
> 304-617-1149
> 



-- 
Ryan Sowers, RPT
Puget Sound Chapter
Olympia, WA
www.pianova.net <http://www.pianova.net>


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