I would answer by saying "just enough". When I say snug I mean "not loose". If you let a balance rail bushing dry with a standard .146 caul it will come out too loose. Yamaha specifies .008" for the balance rail. That's not a lot. On Fri, Apr 2, 2010 at 3:32 PM, David Love <davidlovepianos at comcast.net>wrote: > What’s too loose? A “snug” balance rail bushing may not cause a sticking > key but it sure can cause a lot of excess friction. > > > > David Love > > www.davidlovepianos.com > > > > > On Apr 2, 2010, at 1:38 PM, Ryan Sowers <tunerryan at gmail.com> wrote: > > > The other thing about keybushing that I don't here discussed much is how to > make the balance rail snug enough. If you leave regular cauls in until they > are completely dry they will be way too loose for my taste. I actually > ordered a set of cauls from BiIl that are not oversized (the regular cauls > are .148"). Even so, I remove the cauls after about 15 minutes so they can > swell slightly. Otherwise they are too loose. A snug balance rail bushing > rarely causes a sticky key, and it will correct a lot of key squaring issues > making key leveling easier an quicker. > > > -- Ryan Sowers, RPT Puget Sound Chapter Olympia, WA www.pianova.net -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100402/5ecafc11/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC