Pin Torque

[Newton Hunt]

Hi Avery,

A solid Baldwin block will not need replacing.  Repinning the loose
ones but not more than that.  You are right, you do not jerk a torque
wrench either tightening bolts or checking torque.  Smooth application
of force does it.

		Newton

Avery Todd wrote:
> 
> Newton,
> 
>    Thanks for your, as always, direct and to the point answer. :-)
>    The reason I asked is that some tuner down in Beaumont did some
> torque readings on a 15 yr. old (app.) Baldwin SF that the dealer has
> in the customers home on approval. He got her all upset by telling her
> there was a 'chance' she'd have to replace the pinblock within 10 yrs.
> or so. I checked some of the notes he had written down and told her
> were too loose and they felt OK to me. Not typical Baldwin TIGHT, but
> well within bounds. One of the readings he told her was too loose was
> about '50'. She also said he was "jerking" the torque wrench around,
> so I doubt that he really knows how to use it.
>    Since I've never used one, I just wanted some information from the
> experts to help soothe her fears. It's acutally a pretty nice piano.
> Very lightly used. Just needs some TLC (regulation, voicing, tuning
> etc.), which I'll be giving it next week. Thanks.
> 
> Avery
> 
> >If the pin is so tight you have trouble tuning it, it is too tight.
> >If the pin is so loose that it will not stay in tune, it is too loose.
> >If it stays in tune it is tight enough.
> >
> >20 to 100 inch pounds is a tolerable range.
> >
> >               Newton