[pianotech] snapping pins

[Leslie Bartlett]

I quit tuning a '30's Kimball baby grand which if I moved the pin in
mid-range enough to go +- 20 cents the pins would crack up to half a dozen
times. EVERY pin was that way. Block was not replaced and a highly respected
local rebuilder said the guy has simply swabbed epoxy on the holes, so
ruined everything.  He also did some other stupid things....  Refinished
piano, with veneer on lid beginning to come loose, not fixing the problem,
of course.   But I digress. The issue is the pins..   What would cause the
swabbing of holes with epoxy (pins seem to be original size) cause different
response than wicking CA down into the holes?   I may be smart enough that I
have some idea, but am caught in a conundrum. Several years ago I knocked
out about 3 pin-sleeves out of sever holes on an old piano.  I then filled
the holes with epoxy, then redrilled them and those five holes were very
nicely tight, turned smoothly, and had none of the cracking/snapping  I
experienced today.     I have no real experience for dealing with this, and
would appreciate help.

Thanks

Les bartlett




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