hammer filing

[Richard Brekne]

Interesting stuff Robert.

As long as we are on about this.. heres a technique I have used (and still
do) on a number of occasions. I do this when I know I am going to both do a
major reshaping, change hammer flange centers, and any other general
maintenance to all hammers.

I take off one hammer at a time. Change the center pin, then reshape the
hammer with a sanding drum mounted to my bench drillpress. I have this jig I
use to hold the hammer so that I can just swing it past the turning drum.
Easy to adjust as neccessary for angled hammers. Then I do any other
maintenance (knuckle bolstering... or whatever looks needed) and put it back
on.

When I am done then I just even things out with 240 grit paper and iron to
finish. After useing the sanding drum and jig a few times you get really
consistant results.


"Robert A. Anderson" wrote:

> I used to use the Dremel with the guide back in the "old days." It was
> certainly fast, and the typical piano I was working on was an old upt.
> with mostly shot hammers. ......

snip snip.....

> Even if you use the Dremel, I think it's a good idea to develop a
> technique of filing by hand. Not all hammers want to be filed the same
> way. I get better tactile feedback when I file by hand and I consider
> that my primary technique, even though I use the Dremel in certain
> situations.
>
> Bob Anderson
> Tucson, AZ

--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no