Tuning Pin Torque Information

[Alan]

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100 in./lbs.? I don't think I have more than 10 pianos out here (in the
hills) with that much torque. I'm happy with anything that will stay. =
The
ranges I look at are:
=20
<30 in/lb Usually hopeless but CA will often bring to 40 or more
=20
30-50 Tuneable (usually) but not the most stable, would CA if possible
=20
50+ Usually holds reasonably well
=20
144 in/lbs??? Eat your Wheaties and be prepared to extend that hammer! =
What
is that, a brand new Baldwin???
=20
You've got me thinking on this, believe I'm going to measure more of the
pianos I see regularly and get some actual numbers -- a little study, as =
it
were ...
=20
I've never tuned (or even seen) one of them thar Blippendorfers; what =
would
their pins measure, typically?
=20
Alan R. Barnard
Salem, MO

-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On =
Behalf
Of Terry
Sent: Sunday, January 23, 2005 12:32 PM
To: Pianotech
Subject: Re: Tuning Pin Torque Information


Oh Gordon, shame on you!   ;-)  =20
=20
I know you are going to scream when you read this: the conversion for =
inch
to foot is 12 inches =3D one foot!=20
=20
Expressing tuning pin torque is correct either way, but inch-pounds are
traditionally used by piano technicians.
=20
So 12 ft.-lbs. equals 144 in.-lbs. (it's feet times pounds, not divided =
by).
I've tuned many old uprights with tuning pin torque less than 50 =
in.-lbs. -
too looses for my liking, but seems to hold a tuning pretty well. I find
that anywhere in the 80 to 150 in.-lb. range will be fairly tunable. If =
I
had to specify my favorite, I would say 100 in.-lbs.
=20
Terry Farrell

Hello List.  Back to my problem Yamaha C3 grand.  It has been suggested =
by
others=20
on the list that I check the pin torque.  I have researched the archives =
and
also have read the section on the subject in Arthur Reblitz book Piano
Servicing, Tuning & Rebuilding.  His comment on tuning pin torque is ". =
. if
it takes less than 50 inch pounds, than the pins are probably too loose. =
=20
I read one archive comment on loose tuning pins by John Tuttle.  He =
states
"I believe optimum torque to ne 12 Ft./lbs.
I couldn't find anything more specific in the archives on the subject.
Reblitz says "inch pounds" and Tuttle says "foot pounds". =20
Which should it be "Inch" or "Foot".  I will assume that it can be =
either.
And, is there a conversion on inch to foot?.
Does anyone have some suggestions on tuning pin torque.  I would assume =
that
the torque would be basically the same wether it is a grand, spinet or =
full
upright.
I thank you all in advance.
Regards,=20
Gordon Holley
PTG Associate
Goshen, Indiana=20


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