Knuckles

[Delwin D Fandrich]

In over 30 years I've still not found any consensus on this.  Technicians
and factories still seem to be about evenly divided.

My personal preference is to install the leather so that the nap lies toward
the hammer.  The idea being that there is much more force driving the jack
out away from the knuckle than there is resetting it as the mechanism
returns to rest.  If the clearance is set a bit tight and the spring is a
bit loose, the jack needs all the help it can get.

In truth, of course, after a few thousand cycles it really doesn't matter at
all.

-- ddf

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----- Original Message -----
From: Richard Brekne <richardb@c2i.net>
To: <pianotech@ptg.org>
Sent: Thursday, December 02, 1999 1:15 AM
Subject: Re: Knuckles


> Many thanks Lloyd. I seemed to remember as much but I wanted to be sure.
> Tried to check the nap of the knuckle... Seemed just as smooth in either
> direction really, If you get time you might describe this in a bit more
> detail, and it would certainly be interesting for many on the list to
> hear abit about the reasoning for which way the nap should lie. The jack
> moves in both directions across the knuckle...so which direction it
> needs the smooth run, and why this is so.
>
> thanks again
>
> Richard Brekne
> I.C.P.T.G. N.P.T.F.
> Bergen, Norway
>
> "Lloyd W. Meyer" wrote:
>
> > Richard,
> >
> > The line should be positioned in the direction of the hammerhead.
> >
> > Lloyd Meyer
> > Renner USA
>
>
>
>