weird "threaded" tuning pin

pianolover 88 pianolover88@hotmail.com
Sat, 11 Jan 2003 20:32:13 -0800


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




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