List, I've heard of a liquid that you "paint" on the key pins that drys to a slippery coating. Anybody know about this? Bob Sadowski RPT Erie,PA ---------- > From: Delwin D Fandrich <pianobuilders@olynet.com> > To: pianotech@ptg.org > Subject: Re: glueing controversy > Date: Friday, September 19, 1997 11:30 PM > > Newton Hunt wrote: > > > > I have wished for some heat shrink tubing with Teflon like qualities to > > be use on such. > > > > Alfred Knight had some balance pins that had a Teflon sleeve around them > > to help reduce friction at the bushings and at the balance hole. I do > > not know is Knight continues such practice. > > > --------------------------------------------------------- > > Newton, > > Heat shrinkable Teflon tubing is available. I've gotten it in the past > from electronics distributors—the industrial type, not the Radio Shack > variety. Various diameters are available. If you’re interested in trying > any of these ideas, make sure you get Teflon tubing. The other types are > neither as lubricious nor as tough. > > I've tried it on one set of front rail and one set of balance rail pins > experimentally. You have to enlarge the balance pin hole in the bottom > of the key considerably. A modification which is, of course, not easily > reversible. In this particular case, I had to fix those anyway. It > didn't produce enough benefit to be worth the trouble. For the front > rail, I used very thin bushing cloth to allow for the extra thickness of > the tubing on the key pins. This seemed to provide somewhat more benefit > and might be worth some real study. One experimental keyset does not > constitute a viable test. I wonder, though, if some of the modern > lubricants such as McLube might not provide nearly as much benefit with > a whole lot less work. > > I've also used shrinkable Teflon tubing on a number of set of Steinway > type repetition springs. It’s a very reliable method of permanently > lubricating this friction point. And I do mean permanently. The spring > setting is much more reliable and consistent. It is not necessary to > clean out spring groove in the bottom of the repetition lever beyond a > quick wipe with the tip of a pencil. In fact, half the time I don’t even > do that. > > —ddf
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