Tuning Pin Angle

[Delwin D Fandrich]

Think of it in terms of the string-to-pin relationship. Not the pin-to-block. I
like to have the string leave the pin at about 89º to 89.5º. That is slightly up
in the direction of the coil. If you have access to your old Journals look at
the November 1999 issue.
 
Del


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From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of
Farrell
Sent: April 30, 2007 7:37 PM
To: pianotech at ptg.org
Subject: Tuning Pin Angle


I'm stringing an 1890s open-faced-pinblock Knabe grand. The strings come off a
bearing bar on the plate to the tuning pins at angles ranging from 2 to 8.5
degrees (the steeper angle is for the pins closest to the capo bar).
 
Fortunately I have graduated beyond the realm of drilling all tuning pins at
some magic 7 degrees or whatever. 
 
My general feeling is to drill the hole at the exact angle that will initially
orient the pin perpendicular to the string. My thoughts are that perpendicular
will not encourage the coil to loosen, nor will the string tend to cross over
the coil. But of course, over time, there will be some tendency for the pin to
lean forward (hopefully not much on my Delignit-capped block) a bit anyway. And
of course, over time the tuning pin will be screwed downward into the block -
both motions tending to make some acute angle with the string and the pin top -
which will tend to keep the coil tight - and hopefully not enough angular change
to create a situation where the string wants to run up over the coil.
 
That's the way I see it. What do others have as a preference for tuning pin
angle relative to string angle?
 
Terry Farrell
Farrell Piano
 
www.farrellpiano.com
terry at farrellpiano.com

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