HI everyone, I wanted to know how to change to receiving the list on digest mode. Any suggestions? Thanks Marshall ----- Original Message ----- From: "Ric Brekne" <ricbrek at broadpark.no> To: <pianotech at ptg.org> Sent: Saturday, August 12, 2006 3:50 PM Subject: Key Bushing Clearance/Friction, was: Key mortise correction > Hi Terry > > You dont really. 0.002" and 0.005 are rather more like of theoretical > values which ends up being very close to what the <<optimalized>> bushing > feels like. You develop a feel for this sideways motion in both the > keybutton and the front bushings. And... as such things go... the actual > results vary a bit from tech to tech. Experienced techs whov'e gotten > good at this however display a pretty high degree of likeness in end > results. > > As for how much friction this ends up yeilding. Total key friction > shouldnt end up being more then absolute max 2 grams IMB... and I strive > for 1-1.5 grams. I find it difficult to understand how you can > consistantly get lower then this and still maintain firmness of play > myself. > > Cheers > RicB > > --------- > Two questions: How do you go about measuring key bushing clearance? And > how much key friction does these specs commonly yield? > > Terry Farrell > ----- Original Message ----- > SNIP > 4. Tight key bushing's. Gently squeeze the bushing to have .002" > clearance at BR bushings and .005" for FR bushing's. > > Regards Roger
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