Yes, but in this case Roger was making the assumption that there was a bridge cap.....like in a Steinway......... "<I presume the bridge cap is not cracked.>" Terry Farrell Piano Tuning & Service Tampa, Florida mfarrel2@tampabay.rr.com ----- Original Message ----- From: "Don" <drose@dlcwest.com> To: <pianotech@ptg.org> Sent: Tuesday, August 01, 2000 11:51 AM Subject: Re: Bridge gain delamination > Hi Terry, > > Some grands don't have bridge caps. Therefore the vertical laminations are > quite accesseable. > > At 11:21 AM 8/1/00 -0400, you wrote: > >Roger: O Yee of Great Wisdom. I read these posts with great interest, always > >trying to learn about a situation before I run into it. In the post below, > >if the vertical laminations on the bridge have delaminated (I assume we are > >talking the main portion of the bridge below the bridge cap) and the bridge > >cap is not cracked, how do you get epoxy into and spread around in the > >vertically delaminated areas - isn't the bridge cap covering all this, > >rendering the delaminated area inaccessable??????? > > > >Terry Farrell > >Piano Tuning & Service > >Tampa, Florida > >mfarrel2@tampabay.rr.com > > > >----- Original Message ----- > >From: "Roger Jolly" <baldyam@sk.sympatico.ca> > >To: <pianotech@ptg.org> > >Sent: Monday, July 31, 2000 10:35 PM > >Subject: Re: Bridge gain delamination > > > > > >> Hi Patrick, > >> I am assuming that the splits are only in the vertical > >> laminations. > >> I have successfully repaired a number of Baldwin vertically laminated > >> bridges with separations. > >> > >> You need a few cabinet makers wooden handscrews. ( the wooden clamps with > >> two handscrews) The points of the jaws will allow you to slip down > >between > >> the side of the bridge and the plate. Or you can modify them on a band > >saw > >> so that you can get a good grip on the sides of the bridges.. > >> > >> Remove enough strings to give you room to work. Dry clamp the offending > >> area and see if you can draw the split together, usually no problem. > >> > >> Remove the bridge pins that have hair line cracks. > >> > >> I use West System thin epoxy. Swab the pin holes, and the split. Install > >> new bridge pins. > >> Tighten clamps. Clean excess with acetone. Leave for 24hrs to cure. > >> > >> If you have not used wooden handscrews. You need to practice a little > >> before you start. They have a good deal of clamping power once you get > >> used to them, and are less prone to marking or denting your work. > >> > >> Replacing the bridge pins is a personal fetish for this type of repair. > >But > >> the pin will act like a pump and fill your small cracks from the bottom. > >> > >> I presume the bridge cap is not cracked. > >> > >> Hope this is of help. > >> > >> Roger > >> > >> > >> > >> > >> > >> > >> At 11:57 AM 31/07/00 -0400, you wrote: > >> >Dear List: > >> >I just returned from a piano evaluation, for a customer looking to buy a > >> (32 year > >> >old) small model 350 Kawai grand, walnut veneer, for $4500. Everything > >> looked AOK > >> >EXCEPT: > >> >the bridge gain (cf. Mason, he also calls it the bridge core; I'd call it > >the > >> >bridge body) is separating along the diagonal joint 3-4 notes above the > >> >tenor/treble break. There's minor cracking of the bridge surface at the > >> bridge > >> >pins, but there's clearly been some glue joint failure at the joint in > >the > >> body of > >> >the bridge (the sides of the bridge are no longer flush, the joint line > >is > >> too > >> >prominent). No tonal deficiencies because of it (yet). > >> >I'm (optimistically) thinking I could fix this in the home by running > >> screws with > >> >washers through the separated parts, soak epoxy into the slight but real > >> >separation, etc. I'm hoping that with 2-3 sessions the bridge should be > >AOK. > >> >Have any of you had success with this kind of repair on other Asian > >pianos > >> (I've > >> >seen this as a problem area on all of their long bridges)? > >> >Or should I tell my customer to back out of the deal? > >> >Comments, Jim Jon Ron Roger et al? > >> > > >> Roger Jolly > >> Saskatoon, Canada. > >> 306-665-0213 > >> Fax 652-0505 > >> > > > > > > > Regards, > Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. > Tuner for the Saskatchewan Centre of the Arts > drose@dlcwest.com > http://donrose.htmlplanet.com/ > > 3004 Grant Rd. > REGINA, SK > S4S 5G7 > 306-352-3620 or 1-888-29t-uner > >
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