[CAUT] Pulley keys.

[Roger Jolly]

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Hi Fred,
                We ream the hole thickness with one of those German reaming=
=20
tools before sizing holes, I wonder if that is the difference.  I have=20
noted that the thickness of the bottom of the mortice is all over the map=20
from manufacturer to manufacturer, and quite a variance within one piano.

Roger

At 02:08 PM 3/25/2005, you wrote:
>On 3/25/05 10:22 AM, "Roger Jolly" <roger.j@sasktel.net> wrote:
>
>Hi Fred
>
>like, say tite-bond (how would I know that?)   Oh my! did you you do that=
=20
>silly thing.   I would never do that......... again.(G)
>
>
>Hey, I=92ll try most anything that seems like it might work, and will save=
=20
>some time and effort =96 with a bit of discretion as to what piano I try it=
=20
>on. Which is one reason I love university work. Lots of pianos to=20
>experiment on where nobody will notice if it goes wrong.
>     On the subject of sizing BR holes using a BR pin chucked in a drill,=
=20
> I have to agree with Mannino. I=92ve tried it and haven=92t had any luck.=
=20
> Tried at various speeds and lengths of time (=3D heat, size, ironing=20
> effect). Bottom line, like Don, I think the hole has to be tapered from=20
> above, and the only way I can figure to do that is with an easer from=20
> above. 3 mm or so of cylindrical material the size of the pin is too=20
> much. 1 mm is about just right. (Oh, I used these simple-minded metric=20
> numbers because I was writing with Roger in mind. For the more=20
> intellectual on the list, who like to exercise their minds deciphering=20
> fractions, that would be about 1/8=94 and about 3/64=94. The English=
 system=20
> of measurement is such a wonderful heritage, I hope we never abandon it=
 <G>).
>Regards,
>Fred Sturm
>University of New Mexico

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