Jon - Sometimes I want to speak with authority when all I have is conviction...experience but no proof, no slow-motion videos or electron microscopic photos. So here's what I believe: The reamers do get dull. I'm not sure how long it takes. I sometimes prefer using roughed center pins because of this. It you were to go into a new bushing with, say, a .051" reamer, you'd end up with a different size hole than if you were opening up a bushing that had had a .050 pin in it. The teflon deforms. You don't say what vintage teflon you're doing. The older ones that might be looser in the wood would respond differently. Once, when I was asking Newton about teflon, expecting some subtle wizardry, I was surprised (aghast?...I was much younger) at his recommendation... just give it a little twist, said he! You can bear slightly against the inside of the bushing for part of the reamer's rotation. I'm curious...for those 3 or 4 half swings, what is the friction (assuming you have some device to measure)? Another question...you say your burnishers mic properly. How are you using these on teflon? Lastly, while basically clear, I could use a photo of what Ed Foote spoke of in his post. TeFlons be with you! David Skolnik At 07:39 PM 1/23/2006 -0500, you wrote: >I guess I need a refresher course in repinning these beasties. > >Maybe my reamers are dull. My burnishers mic. properly as do >the straight-sided reamers. > >I usually ream and burnish to same-size re-pin but can't seem to get beyond >4 half-swings. And mostly halting at the third. > > >Help >-- > >Regards, > >Jon Page >_______________________________________________ >Pianotech list info: https://www.moypiano.com/resources/#archives
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