Accu-just hitch pin removal

[Delwin D Fandrich]

----- Original Message -----
From: "Ron Nossaman" <RNossaman@cox.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: July 02, 2003 5:39 PM
Subject: Re: Accu-just hitch pin removal


>
> >Ron,
> >Good ideas. Actually the piano is coming in more a complete restoration
> >next summer in which I'll have full access from underneath the piano and
> >punching the material back up should be more probable.
>
> Hi Tom,
> Then that's probably your best bet. If the pin involved spans two
unisons,
> it should be reasonably ignorable until then.
>
> >I'm still amazed at the rigidity of this material.  I thought this would
> >be a quick drill out and install time. Lesson curve continues!
> >Tom Servinsky
>
> Those little hummers are hardened steel, similar to a high speed steel
> drill bit. You aren't going to cut them out with any edged drill bit on
the
> planet that I'm familiar with. It would take aluminum oxide or diamond
> abrasives, and flooding the area with coolant would be a tad
> counterproductive. It does surprise me that it won't drive on through
> though. It seems pretty unlikely to me that the holes in the plate
wouldn't
> be drilled through, but it's possible. I had an SF in the shop about
seven
> years ago, but I don't remember if that's the case or not. There's a lot
of
> spring to these pins, and it takes a pretty good lick at best to get them
> to move in the hole, so even with a clear through hole it's hard to move
them.
>

Yes, they should be through-drilled except in the bass. Corrosion of some
kind does build up over time and the break-away friction can be
considerable.

Del