Jude Reveley/Absolute Piano wrote: >  Exactly! > In the case of these particularly nasty string height sections, what are > our options? Fix what you can, within your self imposed tolerances, and compensate for what you can't fix within your self imposed limits of time and money. Each individual approach to each individual job will have it's own distinct personality. > Although somewhat unsightly, what about adding washers or dressing the > bottom of the agraffes' base? Why not? Manufacturers did/do. > Do you feel it necessary to tighten the agraffes down. When is too > tight? Any torque specifications. I tighten them. No torque specs, but something under 45° from finger snug to square and seated. > One idea I've been messing with is not going so tight and using a bit of > thread lock. As I understand the strength of threaded bolts, full > strength is reached before a bolt is fully cinched down anyway. I'll try > to get some torque measurements of what I mean. > > Comments appreciated... > > Jude Reveley, RPT The (thankfully few) instances of broken agraffe studs I see are usually the flat bottomed shoulder with the threads stopping short. The agraffe was either forced down past where the threads were actually cut, or not quite seated at all, or both. Or they were seated and just cranked too far past snug on a shoulder that didn't deform to meet them half way. Modern agraffes with the undercut shoulder are much more forgiving. Ron N
This PTG archive page provided courtesy of Moy Piano Service, LLC