>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 ar= e >> 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. Sincerely, Keith A. McGavern kam544@ionet.net Registered Piano Technician Oklahoma Chapter 731 Piano Technicians Guild Oklahoma Baptist University Shawnee, Oklahoma, USA
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