fine grit hammer filing

[Farrell]

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MessageDon, 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 -----=20
  From: Don Mannino=20
  To: pianotech@ptg.org=20
  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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