fine grit hammer filing

[Marcel Carey]

I finish my hammer shaping with 400. It give the attack a little
brightness on soft playing. I find it evens out the quality of attack
from soft to loud playing.

Marcel Carey, RPT
Sherbrooke, QC

> -----Original Message-----
> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On
> Behalf Of Dave Nereson
> Sent: November 12, 2004 2:27 AM
> To: Pianotech
> Subject: fine grit hammer filing
>
>
>
> ----- Original Message -----
> From: "Don Mannino" <donmannino@comcast.net>
> To: "Pianotech" <pianotech@ptg.org>
> Sent: Tuesday, November 09, 2004 11:39 PM
> Subject: Re: voicing/juicing ronsen hammers
>
>
> > . . . . . They still needed a little more, so I filed
> them with 1,000 grit
> > sandpaper . . . . . <
>
>     Isn't 1000 grit about as abrasive as, say, newsprint?
> I'll admit that
> most of the hammers I've filed are on old pianos whose
> hammers have never
> been filed since they were built, and the string cuts are
> an eighth of an
> inch deep or more.  Sometimes I'll re-file a job someone
> else botched.  I
> seldom have a chance to do voicing on really nice grands.
> But even there,
> I've never used finer than 120 grit.  Using finer seems
> like going past the
> point of diminishing returns.  Does going up past 320 or so
> really make that
> much difference?
>     I would think that under a microscope, the surface of
> piano hammers
> would look something like an overgrown back yard or maybe
> an Afro hairdo.
> Sanding something this fuzzy and fibrous with 1000 grit
> seems to me like
> "brushing" your cat with paper to smooth out its fur.
>     What's the finest grit you ever use, and why?
>     --David Nereson, RPT
>
>
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