[pianotech] tightening balance hole was Bouncing Bostons

[jimialeggio]

  JD,

The key to making this work using hornbeam or maple or any hardwood, is 
that there must be no play in the finished hole...any play at all = 
annoying clicks.

Since the key pivots at this hole, the hole cannot be perfectly round.

In a hard wood you can help to minimize how "out-of-round" the hole has 
to be by minimizing the depth of the hole. In quartersawn hard maple 
that means 1/16" (1.5mm-ish)hole depth.  However even with that minimal 
depth, I still have problems managing the necessary front to back 
unihibited movement without introducing noise producing slop in the hole.

Any comments on what I may be missing here.

Jim I








On 8/1/2010 6:21 PM, John Delacour wrote:
>
> Those of you with memories that go back 5 months will remember a 
> discussion (thread: Pully Keys) of a _serious_ balance hole case, 
> which no amount of Elmers balsam or blue steam would have remedied.
>
>
>
>
>


-- 
Jim Ialeggio
grandpianosolutions.com
978- 425-9026
Shirley, MA