Palm Naile driver modification

[Daniel Gurnee]

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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