Palm Naile driver modification

[Isaac OLEG]

Great answer, Daniel, thanks a lot.

I had a feared deformation under impact after the grinding.

My colleagues will appreciate the information as well, again, thank
you.

Isaac


-----Message d'origine-----
De : caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]De la part de
Daniel Gurnee
Envoye : mercredi 18 aout 2004 19:23
A : oleg-i@noos.fr, College and University Technicians
Objet : Re: Palm Naile driver modification


Isaac,

I appreciate your contributions and respond to your query on pin
drivers.  I
modified a standard punch with a Moto Tool grinding bit and have used
it for
50 years. It has an internal radius a little greater than that of the
tuning
pin tip.

Daniel Gurnee, RPT, Retired from HSU.


on 8/11/04 11:11 AM, Isaac OLEG at oleg-i@noos.fr wrote:

>
> Dear lists members,
>
> I have a question in regard with the "driver" shape on the Palm
nailer
> RN 16 that many use for the piano tuning pins.
> The tip of the tool is flat, and it generate a circular imprint on
the
> top of the tuning pins. On standard tuning pins, that little
> deformation is of no concern (seem to me) but I often use Nickel
> plated type (because they were used in the first place, or even just
> for the shiny look).
> On these pins, the circular shape goes along with a little weakening
> of the plating, and it is not very good looking (indeed for the one
> who knows where to look, but also in a more general sense).
>
> I asked Danair, and they say me that the material on the driver is
S-5
> Tool Steel.  The heat treat (hardening) is 52-54 RC.
>
> Nowadays they where unable to tell me if a grinding I propose to
test
> to obtain the spherical shape inside the driver (like on an usual
pin
> driving tool) will weaken the tip, or cause a deformation under use.
> Have anyone tried to modify that tool in that manner, or did you
hear
> of valuable solution (a colleague of mine thought of the use of a
> leather washer cemented on the tip).
>
> Thanks in advance
>
> Your advice on the grinding tool to be used should help also (but I
> will probably ask a machinist to do the modification)
>
>
> Best regards in sunny summer !
>
>
> Isaac OLEG
>
>
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