snap-in center pin bushing problems

David Nereson dnereson at 4dv.net
Sat Aug 18 14:52:02 MDT 2007


Some Acrosonics have wippens with “snap-on” bushings for the
center pins of the sticker.  And the sticker has a 90-degree “L”
at the top, which sits atop the capstan screw.
Sometimes, however, something is not straight and the “L” is
angled off to the side of the capstan.  On a hard blow, the
capstan (and the tail end of the key) just gets forced up
between two stickers and won’t play the note.  I’ve investigated
the sticker and the center pin holes/bushings appear to be bored
straight, i.e., perpendicular to the sides of the sticker, and
the snap-in bushing in the wippen doesn’t appear angled.  Yet
when the sticker is snapped in, it sits askew.
I tried gluing a little sliver of wood to one of the birdseyes,
on the wippen tongue, to rotate the sticker around a little bit.
But it wasn’t enough.
I s’pose I could heat the sticker with a heat gun and twist the
heck out of it, but it would take about a 30-degree twist to
correct it.
Any other solution?  Surely this isn’t the only Acrosonic with
that problem.  Three other keys (actually wippens) have the same
ailment.
            --David Nereson, RPT
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