Daniel, Is your punch a manual or air powered? If air powered, can you perhaps provide a digital picture? Kindest Regards, Garret Garret Traylor High Point Piano 3407-A Archdale Road Archdale, N.C. 27263 P.O. Box 6127 High Point, N.C. 27262 hpp@highpointpiano.com www.highpointpiano.com (336) 887-4266 -----Original Message----- From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]On Behalf Of Daniel Gurnee Sent: Wednesday, August 18, 2004 1:23 PM To: oleg-i@noos.fr, College and University Technicians Subject: 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 > > > _______________________________________________ > caut list info: https://www.moypiano.com/resources/#archives > _______________________________________________ caut list info: https://www.moypiano.com/resources/#archives
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