<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html><head><style type="text/css"></style><title>Re: Pinblock Glassing</title></head><body> <div>Hi Joe,</div> <div><br></div> <div>I'll second Terry's post. We use a locally made thick viscosity epoxy filler, but the West System stuff is very good also. The 225 piano we're building has two plate flanges, one either side of the pin block. We epoxy fit the block to both flanges. Floor wax makes a very good release agent and there's no risk of contaminating the pin block. Only a thin coating of wax is necessary. It doesn't take long and the fit will be perfect. Its also a good idea to grind the plate flanges if they have a very rough finish, or there may be a tendency for the plank to key into the flanges. You don't need to be too particular about the smoothness of the flange surface, but you don't want it too rough either. We epoxy fit the plank to the plate outside of the case, then fit the plank and plate to the case using our action-strike-line jig for determining the location of the plate. While the epoxy is setting, the plank is screwed to the plate in the same manner as it will be fitted in the case. While there's nothing wrong with doing a perfect plank fit the woodworking way (we used to do this), I don't see the point in wasting time on the process when the plank can be quickly fitted up to around 0.5 mm tolerance, then epoxied to make a perfect fit.</div> <div><br></div> <div>I suspect that a well-fitted plate helps tuning stability.</div> <div><br></div> <div>Ron O.</div> <div><br></div> <div><br></div> <blockquote type="cite" cite><font face="Arial">Joe, we just went through this a day or two ago.</font></blockquote> <blockquote type="cite" cite> </blockquote> <blockquote type="cite" cite>Use car wax or any number of other release agents to epoxy does not stick to plate.<i> </i></blockquote> <blockquote type="cite" cite> </blockquote> <blockquote type="cite" cite>I use West System epoxy and #404 High Density Filler (peanut butter consistency). This is their highest strength filler. If you don't goober too much on, you won't need to sand it, so using it is hassle-free. Only used enough to fill any gaps. If you don't goober too much on, it won't spread under the plate web.</blockquote> <blockquote type="cite" cite> </blockquote> <blockquote type="cite" cite>I highly recommend using the West System Two-Step Bonding Method to ensure the epoxy never comes loose.</blockquote> <blockquote type="cite" cite> </blockquote> <blockquote type="cite" cite>100% success rate.</blockquote> <blockquote type="cite" cite> </blockquote> <blockquote type="cite" cite>The plate should be set in it's final resting position when the epoxy is curing - screwed to the pinblock and bolted to the rim - shouldn't need clamps, but it is also fine to use clamps to apply some pressure on the flange toward the pinblock.</blockquote> <blockquote type="cite" cite> </blockquote> <blockquote type="cite" cite>Also, check the archives - no doubt there is tons there also.</blockquote> <blockquote type="cite" cite> </blockquote> <blockquote type="cite" cite>Terry Farrell</blockquote> <div><br></div> <div><br></div> <x-sigsep><pre>-- </pre></x-sigsep> <div><font face="Times New Roman" size="+1" color="#0000FF"><b>OVERS PIANOS - SYDNEY</b></font></div> <div><font color="#000000"><i>   </i></font><font color="#0000FF"><i>Grand Piano Manufacturers</i></font><font color="#000000"><br> _______________________</font></div> <div><font size="-2" color="#000000"><br> </font><font color="#000000">Web http://overspianos.com.au</font></div> <div><font color="#000000">mailto:ron@overspianos.com.au<br> _______________________</font></div> </body> </html>