Keith A. McGavern wrote: > > >SGrossner@aol.com wrote: > >> > >> Dear List: > >> > >> I am about to restring a Chickering grand. The block is good, and I intend to > >> use 4/0 pins. I was set to ream for new pins, when I noticed the holes are > >> tapered so as to get tighter the further down you drive them. The reamer I > >> have, a spoon bit, would eliminate that taper. Something I hesitate to do... > > > >> Regards, Sam Grossner, chicago. > > > >Sam, > > > >The tapering probably went a long way toward allowing the pins to slip, > >because the wood is not pressing equally throughout the length of the > >pin. I would straighten it out without a qualm! Make sure you use a > >3/0 reamer and not a 4/0. I'm assuming 2/0 is what you are removing. > > > >Hope this helps, > > > >Warren Fisher > > Sam, Warren, List, > > Your reason to hestitate to ream these tapered holes is well justified, > Sam. I'd verify the original tuning pins and see if they weren't tapered > as well. > > I recall a Bosendorfer class I attended many years ago tht spoke > specifically to the tapered design as a very special feature. It allows > setting the pins ever so slightly to increase frictional holding power. To > ream these tapered holes out removes that feature permanently. > Keith, Excuse me, but if you are putting regular straight pins back in, aren't you setting up a situation where there might not be enough friction at the top of the pin, or the posibility of splitting the block at the bottom? Just curious! Warren > kam544@ionet.net > Registered Piano Technician > Oklahoma Chapter 731 > Piano Technicians Guild > Oklahoma Baptist University > Shawnee, Oklahoma, USA -- Home of The Humor List Warren D. Fisher fish@communique.net Registered Piano Technician Piano Technicians Guild New Orleans Chapter 701
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