seeking wood screws

[Carl Meyer]

This is a multi-part message in MIME format.

---------------------- multipart/alternative attachment

  ----- Original Message -----=20
  From: Dean May=20
  To: Pianotech=20
  Sent: Saturday, January 08, 2005 10:53 AM
  Subject: RE: seeking wood screws


  >>I use an external tooth lockwasher under the plate.  The reason:  I =
don't want the hanger bolt to turn in the rim when I tighten the nut on =
top.

  Carl Meyer
  PTG assoc<<


  Wouldn't such a washer also tend to prevent the locknut below from =
turning when the hanger bolt is raised? If the hanger bolt is backed out =
to raise the plate, but the nut below doesn't turn with the bolt, then =
the plate remains stationary.=20

  Dean:

  I always fix the nut below with locktite and or a set screw.  So that =
is not a problem.  The nut below must be positioned so that the acorn =
nut does not bottom out.  If the hanger bolt is too long, I cut it off =
to proper length and then slot the end to allow it to be turned with a =
flat blade screwdriver. =20

  You are correct that only if the screw is loose in the rim it might =
turn.  I don't like it too tight and use beeswax on the threads.   I =
have on ocassion made slight changes in plate height after the piano is =
up to pitch.  Just a bit in certain areas where a little more =
downbearing is needed.  Makes you nervous though.  If a larger area were =
to be lowered, I'd remove every other nut, turn the hanger bolts say a =
quarter turn, replace the nuts (not too tight)  then repeat for the =
alternate ones.  I know that's scary but you only live once.

  I catch a lot of flack for removing the "acoustic dowels".  Somehow, =
I'm not convinced that is such a forbidden act.  Maybe acoustic dowels =
complete the circle of sound????

  Carl Meyer
  PTG assoc


  Although I don't have any personal experience with the system yet, it =
seems like you are trying to prevent an inconsequential problem. If it =
the acorn nut tightens sufficiently within a reasonable amount of turns =
after contacting the plate, that alone is evidence that bolt is not =
turning  significantly. If you can't tighten the acorn nut, then maybe =
there is a problem.


  Dean


---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/fd/d4/3c/8b/attachment.htm

---------------------- multipart/alternative attachment--