What is this? A piano question? ;-] I'd try Protek. It won't hurt anything. If you can get at the broken screws...prop up the rail and tap them out with a thin punch. CA in a shim if needed and install new ones. David I. > -----Original Message----- > From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf > Of Dave Nereson > Sent: Sunday, November 12, 2000 8:55 AM > To: pianotech@ptg.org > Subject: Re: pianotech-digest V2000 #984 > > > Does anyone know how to loosen up "frozen" (seized-up) regulating > screws -- > in this case, let-off screws. This is in a Baldwin studio, only 20 years > old or so. I tried turning them carefully and the eyelets would > break off. > So I had to take off the button, grab the other end of the screw with a > vise-grips and turn out the remainder of the screw. But in some > cases, that > would break off also, leaving only that portion of the screw that's in the > wood, and nothing left to grab. So I tried heating them all with a torch, > thinking the expanding metal would also expand the hole in the wood, then > when they cooled, they might turn easier, but no dice. They still break > off. And they're not even rusty. I hate to put any type of oil or liquid > lube, thinking that would expand the wood cells, making the let-off screws > even tighter. How to get the remainder of the screw out of the wood? (I > can do it by carving away enough wood to let me grab some screw with the > visegrips, but hate to butcher the rail). Can ya buy a new let-off rail > from Baldwin (it's the common studio model that's in many many schools)? > >
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