Lance, Where do you get this West Systems and Epotek epoxy? Ted Simmons >I would fill/repair with West Systems epoxy. If you have to, drill holes >along the crack to wedge a tool in to open it up a bit. You may consider >dental oral syringes to inject the epoxy. Plastic grocery bags will keep >the epoxy from spreading too far. >If you need thinner epoxy, Epotek makes epoxy as thin as water. > >Lance Lafargue, RPT >New Orleans Chapter >Covington, LA. >lafargue@iamerica.net > >---------- >> From: Delwin D Fandrich <pianobuilders@olynet.com> >> To: pianotech@ptg.org >> Subject: Rim splitting >> Date: Thursday, June 26, 1997 8:40 PM >> >> John W. McKone wrote: >> >> > I just got back from looking at a Yamah CFIII that I will be rebuilding >> > soon, and found one heck of a rim split. This is not your typical >> > lamination separation that any of us who rebuild see fairly often, but >a >> > horizontal split completely through the rim, from inside to outside. >The >> > split is about a foot long and is located about one inch above the >> > soundboard. It begins on the bass side of the piano, just where the >rim >> > begins to curve around the back. >> > >> > Has anyone had any experience repairing something like this? >> >> Yes. If possible try to find out why it split. I've done three that >> split in a similar manner due to the piano being dropped by movers. This >> seems to happen more often in Japanese & Korean pianos because of the >> "select hardwood" that are typically used in their rims. It's doubtful >> that there would be a structural defect in a piano like this, but check >> it out anyway. >> >> >> > I'm trying to >> > decide what glue and/or filler to use to get the best combination of >> > stability and structural integrity. It seems to me that fiberglass >might >> > be the best bet for gap filling, >> >> "Fiberglass" may fill the gap, but it's a lousy adhesive. Use a good >> quality, reasonably fresh epoxy designed for wood bonding. Check a >> marine supply shop. Geougen (check spelling?) Brothers WEST System epoxy >> is one that would be very good for this purpose. >> >> > but may not hold the split as well as something like resorcinal. >> >> Resorcinal is an excellent adhesive if the glue line is very thin. It is >> a very poor gap filler. >> >> > Ideas? Comments? >> >> Assuming that you use epoxy, you will have to be certain that you fully >> saturate the crack. This means that you will have to figure out some >> method of injecting epoxy fully into the cracked area. If you aren't >> able to do this, you may have to open the crack up further. >> >> I'll leave it to others to deal with repairing the polyester finish >> after you're through. >> >> Call if you want to discuss this further. I'm in the directory. >> >> ddf >>
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