fine grit hammer filing

[David Ilvedson]

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I missed Don's report...I start with 60 or 80 garnet paper and=
 usually stop at 220.   

David I.

----- Original message ---------------------------------------->
From: Farrell <mfarrel2@tampabay.rr.com>
To: Pianotech <pianotech@ptg.org>
Received: Fri, 12 Nov 2004 17:36:11 -0500
Subject: Re: fine grit hammer filing

Don, I'd hate to think I know even one little thing that you=
 don't know, but........
 
"For badly worn hammers or removing a lot of felt on new hammers=
 I start with 180 or 220 grit strips..."
 
I guess you just haven't seen (or have forgotten) BADLY WORN=
 hammers. Some are so bad (we are talking old upright played in a=
 Primitive Baptist Church for 50 years - think about it!) that I=
 start with a router!
 
But then, one could argue I'm not really talking about=
 pianos......   :-(
 
There are some ugly things in this world.
 
Terry Farrell
----- Original Message ----- 
From: Don Mannino 
To: pianotech@ptg.org 
Sent: Friday, November 12, 2004 3:29 PM
Subject: fine grit hammer filing


Dave wrote:
 
>  Isn't 1000 grit about as abrasive as, say, newsprint?
 
Nope, quite a bit rougher actually, and it doesn't leave nearly=
 as much black ink on the hammers ;-)
 
I use 600 grit strips (with plastic tape backing) for final=
 filing when I use strips, and a large (4" x 6") paddle with=
 1,000 grit for fine filing.  I do not file badly worn hammers=
 with 1,000 grit usually, of course, but I do for just a single=
 hammer sometimes.  With a large paddle it is suprising how much=
 you can cut into the hammers, even with very fine grit.   For=
 badly worn hammers or removing a lot of felt on new hammers I=
 start with 180 or 220 grit strips, then finish with 600 or 1,000=
 grit.
 
You'll just have to try to catch one of my voicing classes. =
 Those who have seen one can tell you that I remove quite a bit=
 of felt with that 1,000 grit paddle!  It's all in balancing=
 pressure and speed.
 
Some hammers do respond well to rougher grit, so I keep that=
 handy as well, in both paddle and strip form.  Since I work=
 mostly on new or fairly new pianos, though, the large paddle=
 gets used probably 90% of the time.
 
Don Mannino RPT
 
 


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