This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Thank you Wim. I'll try this next time I encounter a mortised pinblock in need of care. Best regards, St=E9phane Collin. ----- Original Message -----=20 From: Wimblees@AOL.COM=20 To: pianotech@ptg.org=20 Sent: Saturday, May 25, 2002 8:08 PM Subject: Re: Tunings stability problem In a message dated 5/25/02 5:18:17 PM !!!First Boot!!!, = collin.s@skynet.be writes:=20 Hello Wim.=20 Can you tell more about the entire pin block epoxying procedure ? (I = am interested by that).=20 Regards,=20 St=E9phane Collin=20 (Bruxelles, Belgium)=20 I did this on a 110 year old Weber grand with a mortised pin block, = and it worked quite well. I shored up the bottom of the pin block, and = pored a small amount of impact resin in each hole and then drove in a = 2/0 pin in each hole. (in some cases, I was able to just push the pin in = with my fingers, because the holes had gotten so big). I used impact = resin back them because that was what I was familiar with. There are now = new epoxies that will do the same thing. You want a slow curing mixture, = because it takes time to put in the pins. Impact resin gives you about = 10 minutes to work with. So obviously, I only did a small section at a = time. In this case, the pin block also was delaminated, so in addition = to filling the cracks, the resin also filled the gaps between the = lamination. To tighten the gaps, I clamped the block with C claps in = about four or five places.=20 I let this sit for about 3 days. I removed the 2/0 pins, and then = strung the piano with 3/0 pins. Some of the resin will come out on top = of the block. So when yo're all done, you can chisel off some of the = excess, but it will deface the top of the block. If you have an open = face block, you probably would want to put a nice piece of veneer on the = top of the block. All you need to do is dimple the holes. A tuning pin = will drive right through the veneer.=20 I did this about 12 years ago, and the piano is doing fine. There will = be a little different feeling to the pins. They don't turn like they do = in wood, but that is a problem only the tuner has to deal with. There is = enough torque to hold the string.=20 Hope this is enough information. If you need more, just ask.=20 Wim=20 ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/47/d1/e3/cb/attachment.htm ---------------------- multipart/alternative attachment--
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