Drive Tuning Pins?

[David Skolnik]

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Chris -
How about some derisive comments of support?  Why do you say that 
"normally" you would CA'um?  I'm thinking that maybe the appropriate 
application of this process has been misunderstood.  CA should be a last 
resort, as I see it.  A little more information would allow more specific 
response.  For example, do these look like the original pins?  What size 
are they?  Would driving them cause any problem in the angle of the string 
coming off the tuning pin, in the bass?  Is there any sign of any 
separation between block and back?

It's important not to over-drive the pins, as you might then create 
excessive torque.  Also, you should be able to tell from the sound and feel 
of the hammer hitting the driving punch whether the pins have already 
bottomed in the hole. Try a few.  A tool to measure the torque (torque 
wrench) is not a bad item to have, but not cheap.  Schaff has one (actually 
it's in the Apsco Catalog) and Pianotek has a fancier one.

Sorry, I couldn't work up derision today.

David Skolnik





At 09:39 AM 10/27/2004 -0700, you wrote:
>I've got a customer with loose tuning pins (well, I mean her piano, of 
>course).  It's an old upright piano of nominal value.  Normally I would 
>not drive the tuning pins to correct this, I would do the CA glue thing 
>(unless there are indications of a more serious problem).  But in this 
>case I am considering driving 'em, because:
>
>1) The tuning pins are really high (about 1 inch), and there is lots of 
>room between the coils and the plate.
>
>2) All the pins in the piano seem to have about the same torque.  So that 
>makes me think that I'm not seeing a cracked pinblock problem.
>
>Comments, support, or derision please.
>
>Chris Henke
>Portland, Oregon

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