Bob: According to the copy of the Baldwin Piano Service Manual that I have, dated 1986, key height for the Baldwin concert grand is "2 9/16 inches ... approx." Hammer blow distance is 1 7/8". Let-off is 1/16" below the string. Hammer drop is another 1/16" below let-off. Key dip is .428" "... measured at the front of the key cover overhang." Aftertouch is at least 0.025" , but not greater than .060". There isn't any distinction made in the service manual between various versions of the Baldwin concert grand with regard to regulating specifications. Good luck! Allan N. Schumacker, RPT Nassau Community College Garden City, NY On Jul 4, 2009, at 2:56 PM, Bob Hull wrote: > > Rebuilding the action of an SD 10 and it appears that someone has > already been monkeying with this one. The balance rail pins are > almost buried in the mortise. The key ht. on the old action is 2 > 3/4" to the underside of the keytop. Does someone know what the > original specs were? The piano action handbook says 2 9/16" for > Baldwin concert grand but I didn't know if the SD10 would be > different than a generic older Baldwin concert grand. > > Also, original specs for hammer blow and dip if you know. I'll > make my adjustments from there. > > > Thanks. > > Bob > > >
This PTG archive page provided courtesy of Moy Piano Service, LLC