Palm Naile driver modification

[Isaac OLEG]

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