[CAUT] Tuning Pin Questions, self adhesive nameboard felt

[Fred Sturm]

Hi Dave,
	This sounds very strange. I have a 3-4 year old M at UNM, and it has  
normal key bushings. I think that in manufacture of key buttons, they  
tend to use a cloth with heat sensitive glue pre-applied, and then  
heated cauls activate the glue. If there was a malfunction where the  
cauls weren't hot enough, or not given enough time, maybe you'd get  
something similar to what you describe, a cloth with a fairly thick  
glue "backing" sitting in the key button mortise. Except that the  
material would be felted cloth, not the nameboard stuff, which isn't  
woven and isn't very dense.
	Could this be the case? I simply can't imagine any piano (or key  
button) manufacturer using self adhesive nameboard felt in this  
application. Well, I guess I can imagine it, but it seems pretty  
unlikely.
Regards,
Fred Sturm
University of New Mexico
fssturm at unm.edu



On Jul 9, 2008, at 4:56 AM, Porritt, David wrote:

> These were the original factory bushings.  Same self-stick felt on  
> all buttons though the guide rail bushings were “normal”.  This  
> piano is in a practice room for piano majors.  Four years is not  
> unusual to need bushings in that case.  Those pianos are played long  
> and hard – especially hard!  We have another M purchased at the same  
> time but I haven’t rebushed that one yet.  I’m sure I will soon.
>
> dp
>
> David M. Porritt, RPT
> dporritt at smu.edu
>
> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf  
> Of Kendall Ross Bean
> Sent: Tuesday, July 08, 2008 7:13 PM
> To: caut at ptg.org
> Subject: [CAUT] Tuning Pin Questions, self adhesive nameboard felt
>
> Dave~
>
> A 4 year old Steinway M? Self stick nameboard felt? Were those the  
> original factory bushing in the keybuttons?
>
> Or had it been previously rebushed.....?
>
> Or were there two kinds of felt on the keybutton?
>
> (Its just hard to believe keys would have been rebushed within the  
> first four years...
>
> (Either confused, or incredulous, or perhaps, both~)
>
> ~Kendall
>
> PianoFinders
> www.pianofinders.com
> e-mail: kenbean at pianofinders.com
> phone: (925) 676-3355
>
> Connecting Pianos and People
>
> Kendall:
>
>
>
> You asked how many still use self stick nameboard felt.  This summer I
> rebushed the front and balance rail bushings on a 4-year old  
> Steinway M
> and while the guide pin bushings were traditional, the felt on the key
> buttons was clearly self-stick felt!  It was the exact same stuff as  
> the
> nameboard felt.  Fortunately it came off well - the sticky stuff stuck
> to the felt not the button - but I had certainly never seen that  
> before!
>
>
>
> dave
>
>
>
> David M. Porritt, RPT
>
> dporritt at smu.edu
>

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