[CAUT] Agraff levels

[Fred Sturm]

I don't know where Steinway buys agraffes, but they now own Kelly  
Plate, and they have upgraded that facility to install a computer  
controlled drilling process. The spacing of agraffes in new pianos is  
MUCH better in the past two to three years. I suspect the square of  
the holes (hence lack of cant of the agraffes) is much better, too -  
I haven't noticed much trouble leveling strings on the few new  
instruments I have serviced. They used to have Kelly drill their  
plates. Bad idea.
	All that said, perfection of hole drilling in cast iron is iffy at  
best. The unevenness of the material itself causes bits to chatter,  
at least in my experience. It's not like drilling brass.
Regards,
Fred Sturm
University of New Mexico
fssturm at unm.edu



On Jul 17, 2006, at 8:04 PM, Willem Blees wrote:

> It sounds like we're talking about two different issues. One is the
> level of the agraff itself, compared to the level of the of the plate.
> What you claiming is that the plane of the agraff holes are not level
> with the plate. Which could be caused by poor drilling, or that the
> counter sink of the agraff hole is not flat, which will cause the
> agraff to cant to one side when it is tightened.
>
> The other issue is the holes in the agraff, which is what I was
> referrring to. Although there might be very minute differnces in the
> plane of the holes compared to the top of the agraff, I think the  
> holes
> themselves are level.
>
> BTW, does Steinway make their own agraffs, or are they outsourced?
>
> Wim
> Willem Blees, RPT
> Piano Tuner/Technician
> School of Music
> University of Alabama
> Tuscaloosa, AL USA

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