Jon is correct in his technique for identifying buckskin nap. Avery is correct in the direction. According to the Renner Company who knows a little about putting piano actions together, the jack should be moving "against the grain" as you push the key down (the direction Jon describes as _towards_ the flange). The jack should then have as smooth a path as possible getting back under the knuckle. Joel Rappaport PS: Avery, you put the quote at the top of your post, you traitor! Avery Todd wrote: > > Jon Page wrote: > > >When you go to install new knuckles, remember to gently rub > >the buckskin on your lip. You will feel the grain and thus align > >it so the smoother surface goes in the direction of jack travel. > >That would be _towards_the flange. Otherwise, the rougher > >side would cause a slight drag. > > Jon, > > Am I reading you correctly? You "want" the jack to come toward you > against the grain as the key is depressed and return with the grain to > enable it to get back under the knuckle quickly. At least that has always > been my understanding. > > Avery
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