Jumpy Tuning PIns

[Jon Page]

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At 02:19 PM 6/8/2002 -0400, you wrote:
>Regarding the jumpy tuning pins in the piano I'm restringing, I meant to 
>say that they are so jumpy that I believe the piano will be very difficult 
>to tune.  I read the naptha suggestion in Reblitz.  Almost half of the 
>tuning pin holes have the "black" in them but this wasn't obvious before 
>the old pins were removed, or I may have backed out on the job then.  When 
>I tried the 3/0 instead of 4/0 there is less jumping and creaking, but the 
>torque on those is only 80 or a little more.  Isn't that too loose to 
>start with? Also, when I tried a new pin (4/0) in a hole with no "black" 
>in it, it was jumpy too and did seem too tight (torque 160).  I tried 
>tuning pin driving fluid (APSCO) in a couple of the holes.  At first it 
>seemed to do the job and eliminate the jumping, but a couple of hours 
>later they were almost as jumpy as the others. Any ideas would ! be 
>appreciated!

Did you ream the holes and/or use a gun barrel brush to deglaze them?

Dipping the pin into powdered rosin before driving them in helps to improve 
the feel.
Regards,

Jon Page,   piano technician
Harwich Port, Cape Cod, Mass.
mailto:jonpage@attbi.com
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