Fred, The difference is the same as the difference between the profile of a flat head wood screw with its 60 degree angled head going into the straight shank on the one hand, and a bugle-headed screw like sheetrock or decking screws where there is a smooth curve from the top of the head to the shank. Alan > From: Fred Sturm <fssturm at unm.edu> > Reply-To: "College and University Technicians <caut at ptg.org>" <caut at ptg.org> > Date: Mon, 07 Jan 2008 16:18:07 -0700 > To: "College and University Technicians <caut at ptg.org>" <caut at ptg.org> > Subject: Re: [CAUT] Mason & Hamlin agraffes > > Hi Alan, > What does "radiused" mean in this context? I know what the PIanotek > one is like (have one), and would appreciate a more descriptive > account of the difference. Judging from the picture, it maybe has to > do with multiple cutting flutes? > Regards, > Fred Sturm > University of New Mexico > fssturm at unm.edu > > > > On Jan 7, 2008, at 12:21 PM, Alan McCoy wrote: > >> Hi Don, >> >> The reamer you have is probably from Pianotek and if so, it is not >> radiused. >> Than one actually has a countersunk-type profile. The one from MSC >> is truly >> radiused. If you are really into polishing after reaming, a faster >> way to go >> (than Revenko-Jones) is with a dremel and a polishing bit you can >> get from >> Wigets.com. It is a teardrop shape and a pink color and feels sort >> of like >> an eraser. Sorry I don't have the link here at school. >> >> The reaming can definitely be done in the home. Hold the drill in >> your hand, >> and also hold the agraffe in your hand and go slowly. By doing it in >> your >> hands there is give and you are much less likely to chew up the >> agraffe. The >> whole set can be done this way very effectively - reaming and >> polishing - in >> maybe an hour. >> >> Alan >> >> >>> From: Mark Cramer <cramer at brandonu.ca> >>> Reply-To: "College and University Technicians <caut at ptg.org>" <caut at ptg.org >>>> >>> Date: Mon, 07 Jan 2008 12:22:39 -0600 >>> To: 'College and University Technicians' <caut at ptg.org> >>> Subject: Re: [CAUT] Mason & Hamlin agraffes >>> >>> Actually no Don, I don't recommend the drill press. The bit can >>> grab and >>> make a mess (take my word, or do I need to send photo? ;>) >>> >>> >>> >>> The bit will self-center in the hole, and I will suggest once more >>> that the >>> variable speed drill with slip clutch is the ticket. You want to >>> hold the >>> drill with a loose grip and light pressure, so that if the bit >>> should catch, >>> the impact is wasted, rather than transferred to the agraffe. >>> >>> >>> >>> i.e.: the bit needs to be able to "chatter" if necessary, to >>> prevent a >>> sudden calamity. >>> >>> >>> >>> So yes, you do need to remove the agraffe and be able to hold it >>> flat to >>> your work-surface. (my simple holding fixture works great, sorry the >>> description may be a bit vague) >>> >>> >>> >>> In any case, I agree this is not a comfortable repair to do on-site. >>> >>> >>> >>> Good luck! >>> >>> Mark Cramer, >>> >>> Brandon University >>> >>> >>> >>> _____ >>> >>> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf >>> Of Donald >>> McKechnie >>> Sent: January 7, 2008 11:41 AM >>> To: caut at ptg.org >>> Subject: [CAUT] Mason & Hamlin agraffes >>> >>> >>> >>> Mark, David, Ron & Ric, >>> >>> >>> >>> Thanks for your replies to my questions. I just spoke to my >>> customer and she >>> has agreed to try replacing the strings on the note. If I can get the >>> agraffe out without any fuss I will try polishing the holes as >>> shown by Paul >>> in the March 05 Journal. Trying to use the reamer during in home >>> service >>> could get a bit dicey. It needs to be perfectly still, preferably >>> at a drill >>> press to ream correctly. Paul's point about the reamers leaving >>> striations >>> is a good one. The buffing method is more work but perhaps better >>> for in >>> home service. We'll give it a try and hopefully this will work for >>> now. She >>> has not complained of other notes having this buzz but I would bet >>> that will >>> come up at another time. >>> >>> >>> >>> Thanks again, >>> >>> Don >>> >>> >>> >>> Don McKechnie >>> >>> Piano Technician >>> >>> Ithaca College >>> >>> dmckech at ithaca.edu >>> >>> 607-274-3908 >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >> >> >
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