Broken frame rails on Steinways

[Isaac OLEG SIMANOT]

Hi ,
That works for sure, but the problem with split (yes!) rails is that
regulation don't stay here, and that energy is lost.

I had the case of a non split hammer rail, that split when in the shop all
the parts where off ( and the shop is climate controlled ). Still did not
understood what had been.

Ok may be I did not notice at first, but I don't think so, I am careful with
that (been caught once it is enough).

Do you have the 3M microfinishing film quality (sanding) in the US ? Is 3M
an American trade ?

I mesure the front rail of the keyboard of my S&S mod C 1969 hamburg, and it
is thinned right and left 0.10 ' difference.

I did not check the keyed, it seems difficult to have it warped (shaped) at
the front accurately (I've find that Kaway key frames where thinned too)


Regards.

Isaac



> -----Message d'origine-----
> De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part
> de David Ilvedson
> Envoyé : lundi 22 octobre 2001 23:45
> À : pianotech
> Objet : Re: Broken frame rails on Steinways
>
>
> A great repair for stripped screws in general is a shim of hard shoe
> leather and a bit of CA glue pushed into the hole along one side or both
> sides...Always works!
>
> David I.
>
> *********** REPLY SEPARATOR  ***********
>
> On 10/22/01 at 9:45 PM John Delacour wrote:
>
> >At 13:38 22/10/01 -0400, A440A@AOL.COM wrote:
> >
> >>     I assume  by "open" you mean split or shattered.  Yes,
> this is quite
> >>common.  It seems that on Steinways built between the beginning and 1930
> >>Hammer rails would often split along the corners. I expected it was from
> >the
> >>stress of hammer screws compressing the rails onto ever
> shrinking dowels.
> >>However, I have also seen a lot that were cracked at the bottom, so my
> >logic
> >>is suspect here....
> >
> >The most common cause of split rails in my experience is ham-fisted
> >tuner-repairers.  First they overturn the screws and order the next size
> >up, which they screw into the old holes.  Next they overturn these and
> >meanwhile the flange is getting more and more squashed.  The final
> >solution
> >is to enlarge the flange holes and use the next screw size up.
> These must
>
> >be tightened with two hands to make sure the flange gets even more
> >squashed
> >and the point of the screw presses hard against the bottom of the brass
> >rail.
> >
> >It may be that swelling of the maple dowel alone can cause split
> rails but
>
> >I'd say incompetent workmen account for most of them.
> >
> >JD
>
>
>
>