Patrick - I would echo Joel's reply, at least the part about rolling the pin between files, as I haven't used the Pianotek reamers. Drill bits won't work, at least in part because they are not accurate enough, and, I suspect, because their main cutting edge is at the bottom, not the sides. The ones I have (when I can find them) are copies of what Steinway was using, at one point at least. Made by Johnson Carbide, 4 flute, from .490" to .530" in .0005" increments. They worked well, at least until they started to feel dull, but I never found a direct relationship, that is, I would generally stay "undersize" with the reamer in relation to the pin size, or sometimes find the need to "cheat" a bit, by bearing, just a bit, to one side or another. They were not cheap, and I had to have a minimum (10 sets) made. Don't ask where they are now. By using different coarseness file, you can get the roughened pin to slightly different cutting diameters, and you can "refresh" the cutting edge easily. Or, as I think Newton once told me, you can get some results just by deforming them, slightly, of course. Before starting, recheck the price of a set of them bushings, just to remind yourself to not to screw any up. Have fun. David Skolnik At 05:22 PM 6/25/2005 -0500, you wrote: >Patrick, > >I read into your questions that you don't do many teflon bushings, and >are looking for something temporary. >Without a doubt the Pianotech reamers are the best tool. I have found >the tapered reamers to be a waste >of time . > >However, I remember during the teflon age that a very temporary reamer >could be made by rolling >a center pin between two files. Check the final size of the reamer pin >after a couple of runs between the files >to match the fit of the bushing. There are a few nuances with this >solution to make it work, but it can produce >clickless results. > >Joel > >Joel Jones, RPT >Madison, WI > > >On Jun 25, 2005, at 4:04 PM, J Patrick Draine wrote: > >>It's been a long time since I've repinned teflon bushings (click! click!) >>-- and lo and behold the straight reamers which I bought maybe 25 years >>ago have disappeared from my toolkit. The reamers which Pianotech sells >>are $20 apiece (or a set of 8 for $140). Yikes! Can one find these >>through other (non piano) suppliers at a better rate? Would reaming with >>drill bits of the same diameter yield acceptable results? I assume using >>the Mannino reamers would be a very major faux pas? >>Patrick Draine >> >>_______________________________________________ >>pianotech list info: https://www.moypiano.com/resources/#archives >> > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives
This PTG archive page provided courtesy of Moy Piano Service, LLC