weird "threaded" tuning pin

[Wimblees@aol.com]

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In a message dated 1/12/03 4:49:19 AM !!!First Boot!!!, 
pianolover88@hotmail.com writes:

> servicing my brother's recently acquired Broadwood "cottage" grand, circa 
> 1858. after a thorough cleaning and general inspection, I began the 
> delicate 
> task of tuning (to A435). Straight strung and all strings single strung as 
> well. As I started, my brother read a little warning decal that 
> surprisingly 
> was still intact. It warned to "the piano tuner",  "DO NOT HAMMER LOOSE 
> TUNING PINS!"  I was expecting it to continue.."WITHOUT FIRST SUPPORTING 
> PINBLOCK!" But it didn't.  Not sure exactly what was meant, I commenced 
> tuning. Many of the oblong pins were so loose, they could in no way hold 
> even the slightest amount of tension, so I removed the becket from one pin, 
> 
> removed it, and then I realized the reason for the warning...the pins were 
> actually threaded like a machine screw! Earlier, I had pulled the action 
> and 
> noticed the decent condition of the pinblock from underneath, and figured 
> maybe some CA glue would tighten the pins, at least for a while. So I asked 
> 
> my self, "what's the deal?" You can't use a larger tining pin, because the 
> plate tuning pin holes are threaded a good 1/2" deep, and will NOT take a 
> larger thread. So what can be done short of replacing the pin block, which 
> I 
> assume is what's holding the last half of the pin snug? Shim it with 
> sandpaper? Anyone else have experience with this weird kind of pin? Wonder 
> if it's related to the "screw stringer".
> 
> 
> Terry Peterson
> 
> 

Terrry

I serviced a piano like this in St. Louis. I had the same problem, loose 
threaded tuning pins. I told the customer the piano was untunable. The only 
solution I could offer was to completely rebuild the instrument. He did not 
want to do that.

But you brought up an interesting solution. I wonder if CA glue in the hole 
would do the job? According to what we've read on this list, CA glue works on 
"regular" pin block. So it might work on the threaded pins too. What have you 
got to loose?

Wim 

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