pinblock drilling angle, with pin bushings

Michael Spalding spalding48@earthlink.net
Sat, 1 May 2004 21:25:34 -0500


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Listers,

Just finished stringing a piano with tuning pin bushings.  Drilled the pinblock at 4 degrees, but the bushings, of course, are aligned with the holes in the plate webbing at 0 degrees.  Also, unless the pinblock drilling is perfect, the bushing will be offset from the pinblock hole.  So as the pin is driven through the bushing and into the pinblock, I can see it change direction, and I would think that either the bushing or the pinblock (or maybe both) is being damaged by this misalignment .   Pin torque is right where I want it, so maybe I'm obsessing over nothing.  But I would appreciate hearing from some of you who have more years of following your restringings, is this in fact a problem, and if so, how do you minimize the effect?

thanks


Michael Spalding
spalding48@earthlink.net
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