--On Tuesday, May 4, 2004 11:51 AM -0500 Mark Cramer <Cramer@BrandonU.CA> wrote: > Question: > > I'm having trouble with key-frame shift-pins; noise/friction from the > bass-side in particular. > > I've squared the pin to the key-bed, rotated the pin to the last fresh > side, then finally ended up filing all four surfaces, rounding the > aris's, then fine-sanding, polishing and lubrifying. > > I've re-bedded the key-block to provide no more than sufficient down > pressure, and rounded the pin-guide (brass) and finally burnished the > contact surface to a shine. > > Everything was slick for the competition, however this morning it seems > the mild scraping sound has returned. When I remove the block, I'm afraid > I'll see the fine tell-tale abrassion marks again > > Any long-term solutions? > > Replace the shift pin(s)? > > Re-fit the key-block to a Yamaha system? Yes, replace the shift pin(s). Yamaha system works well (I've retrofitted successfully). Pianotek (I think) now sells the Hamburg Steinway system. I got one, but haven't had time to install it yet, so don't have experience to offer. But it sure looks like a good system. Regards, Fred Sturm University of New Mexico
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