Ron, Never had a problem with replacement agraffe threads. Lately I've been buying agraffes for S&S from Pianotek. They package them as sets for the specific model, at about 60$US. Includes the appropriate number of wide-spaced bi-chords. Mike Ron Overs wrote: > Hello all, > > We're currently at the assembly stage of a moderate overhaul of a 20 > year old US Steinway M. I didn't like the original agraffes with their > oversize string holes, so I decided to replace them with new parts > instead of re-cutting the original string holes. > > The new agraffes have been here for a few weeks. I sourced them from a > local parts supplier. > > Today was intended to be the 'fitting agraffes' day, but it ended up > as the 'return agraffes to supplier' day. Being a US piano, the > agraffes threads are 1/4" by 36 threads per inch, but the parts > supplied turned out to have a thread size of 6.5 mm OD by 0.75 mm > pitch. Has anyone had this experience? The intended replacement parts > (ie, the 6.5 mm things), instead of measuring around 0.246" across the > thread OD when measured with a micrometer, actually measured right on > 0.250", which is just around 6 thou smaller than their 6.5 mm nominal > size which would be 0.256". > > Anyone out there have any ideas about a possible supplier of quality > 1/4" X 36 TPI agraffes, which are actually the intended thread size > without oversize string holes? > > Since our supplier ordered the parts as being 1/4" by 36 TPI, I'm > wondering how many others there are who have been caught with these > out of spec parts. For the reference of others, these out of spec > agraffes can be screwed into the plate holes about 3 - 4 turns before > they tighten up due to the misalignment of the thread pitch. > > Ron O.
This PTG archive page provided courtesy of Moy Piano Service, LLC