Fred, It's nice to have a real pianist comment! How about octave glissandi? I've always felt that was a good test for an action... Wouldn't it be nice if we didn't have to use any chemicals or additives to bushing cloth?! I think this is possible with the hard anodized pins... I'll take a closer look myself.. If it appears to be low friction from the start then I would expect, based on my 16 year experience with capstans, that the friction will be just as low in another 16 years with key bushings. It would be interesting to put a few heavily used practice pianos into service with mixed conventional pins, conventional pins with lubed felt, and hard anodized pins and see how they hold up over time... Thanks, David >Another aspect is the glissando. And one of the best ways to check is >to do a pianissimo glissando:<snip> >While I concur with concern over environmental issue of materials, if >the pins are plated and the bushings are felt (or leather), there >needs to be lubrication. For me, that means McLube for the pins and >teflon powder or occasionally Protech CLP for the felt. The anodized >pins may reduce the need for lubrication, but I think I would still >lube the felt. <snip> >Fred Sturm David Stanwood wrote: > <snip>Pushing sideways against the front rail pin and moving the key up > and down to feel the increase in friction is an important test that > we all need to do on every piano we service. It's an issue for the > quality of piano playing because pianists often strike the keys at a > glancing angle ant the frictional touch weight increases > dramatically if the coefficient is high<snip>
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