TP bushings: was pinblock hole alignment

[Wimblees@AOL.COM]

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In a message dated 5/10/01 5:45:58 PM Central Daylight Time, 
davidlovepianos@hotmail.com writes:


> The issue is not whether the holes are centered but whether the hole in the 
> bushing lines up with the hole in the block.  Bushings are not always 
> uniform and even if they were it only takes a slight error in marking to 
> not 
> have the hole in the bushings line up with the hole in the block.  If they 
> don't, the pin can bear on the bushing rather than on the front side of the 
> hole in the block and can effect tuning stability.  Better to drill through 
> both insuring that the holes are aligned.
> 
> David Love
> 
> 

The wood of the bushing is not hard enough to effect the tuning pin, and thus 
effect tuning stability. I don't know why some companies use bushings in the 
first place. I guess maybe to look good, and keep the dust out of the pin 
block. (that's a joke). Or maybe, as you have found, it centers the drill 
when drilling holes in the pin block. Technically, you don't even have to 
have bushings in plates that call for them, because I don't think it has 
anything bearing on tuning stability. 

Just my 3 cents worth. (1 cent surcharge for higher gas prices). :)

Willem 

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