Steps for determining Hammer boring info?

[John Ross]

Hi Kieth,
Thank you, that is what I wanted.
Best regards,
John M. Ross
Windsor, Nova Scotia, Canada
jrpiano@win.eastlink.ca
----- Original Message ----- 
From: "Keith Roberts" <kpiano@goldrush.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Sunday, April 27, 2003 11:36 PM
Subject: Re: Steps for determining Hammer boring info?


> I asked this question before, so this is how I think it should be done
from
> what I gathered. Set the hammer rest rail to what would appear to be the
> natural position or original with the old felts. With the hammer shank
> parallel to the strings, measure what the bore distance would be and see
if
> that is in a good place in the molding of the hammer. I think closer to
the
> felt on the big hammers is better. If so, check to see what the blow
> distance sets up to be with the rest rail position. Longer shank, give
more
> blow distance. If it looks good, give about 2 degrees of rake. If the
action
> is forward and the hammer hits the strings before the shank becomes
> parallel, add more rake, up to 7 degrees or so. Original seems to have the
> hammer at about 90 degrees to the string plane. Find the strike line from
> note 88. Tilt the bass hammers sideways no more than 18 degrees or you
will
> have rubbing problems. Fan the tenor to match the angle of the string.
> Should be easier than you think and isn't that critical. Evenness from one
> hammer to next  so whatever sound you get is adjustable evenly...
> Keith Roberts
>
> ----- Original Message -----
> From: "John Ross" <jrpiano@win.eastlink.ca>
> To: <pianotech@ptg.org>
> Sent: Sunday, April 27, 2003 11:29 AM
> Subject: Steps for determining Hammer boring info?
>
>
> > Hi list,
> > I have an upright Heintzman, the tall one. It came to me with the
hammers
> > all missing.
> > I decided to replace the butts, (brass rail), I already had the butts,
so
> > since the rail seems good, I am using them.
> > The next time I will change to wooden flanges, as has been suggested
> > recently, on the list.
> > The butts are apparently bored to a different angle, than the originals.
> The
> > originals had been massacred over the years as well, so there was some
> > variance in them.
> > How do I determine the pitch, and bore length for the new hammers.
> > I am getting Abel hammers from Wally.
> > Regards,
> >
> >
> > John M. Ross
> > Windsor, Nova Scotia, Canada
> > jrpiano@win.eastlink.ca
> >
> >
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> >
>
>
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