<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2600.0" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Super Glue </FONT></DIV> <DIV>Joe Goss<BR><A href="mailto:imatunr@srvinet.com">imatunr@srvinet.com</A><BR><A href="http://www.mothergoosetools.com">www.mothergoosetools.com</A></DI= V> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=pierre.gevaert@belgacom.net href="mailto:pierre.gevaert@belgacom.net">Gevaert Pierre</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, June 15, 2002 = 1:01 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Doping pins.</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial size=2>Dear list,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>What is CA glue?</FONT></DIV> <DIV><FONT face=Arial size=2>Are there different qualitys or = brands that are better to use?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Thanks,</FONT></DIV> <DIV><FONT face=Arial size=2>Pierre Gevaert.</FONT></DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=Billbrpt@AOL.COM href="mailto:Billbrpt@AOL.COM">Billbrpt@AOL.COM</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, June 15, 2002 = 4:19 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Doping = pins.</DIV> <DIV><BR></DIV><FONT face=arial,helvetica><FONT size=2>In a = message dated 6/15/02 8:47:25 AM Central Daylight Time, <A href="mailto:ptuner@optonline.net">ptuner@optonline.net</A> (Matt = Wynne) writes: <BR><BR><BR> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff = 2px solid; MARGIN-RIGHT: 0px" TYPE="CITE">> > Matt, List: <BR>> > <BR>> > I = may have missed a post or two on this thread, but is there an advantage = <BR>> > to turning a grand upside down?  I've used CA glue for = loose t-pins from <BR>> > the topside only - and with pretty good = results so far. <BR>> > <BR>> > Jerry Gravina <BR><BR>Jerry: = <BR><BR>I like to flip grands because the CA is applied directly to the pins = and <BR>immediately surrounding area.  I haven't commissioned a = study but I imagine <BR>that if you apply from the top, some glue gets = absorbed by the tuning pin <BR>bushing.  If I have room, it usually takes = me under 5 minutes to flip a <BR>grand = alone</BLOCKQUOTE>.</FONT><FONT lang=0 face=Arial color=#000000 size=3 FAMILY="SANSSERIF"> = <BR><BR>Although I rarely get involved with something like this, there is a time and = place for everything.  There is a friend of many years who has a Lyon = & Healy grand that has been sitting around in unplayable condition for about = 10 years.  It really needs rebuilding but there is no way he could = afford that.  The soundboard and bridges are in flawless shape. = <BR><BR>Upon inspection, the pinblock looked good too with no visible = delamination but many of the tuning pins were uncontrollably loose.  I decided = that this was a good candidate for CA glue pinblock doping.  Last weekend = we did the doping job and today I will go finish the project. <BR><BR>I = look at it from a theoretical point of view:  couldn't I surround more of = the pin more effectively by first turning the piano over and doping from the = backside, then from the top?  Not only did this work very well = but upon doping from the backside of the pinblock, there was some seepage = through to the edge of the pinblock between the bottom two laminations. =  This told me that even though the block was not *visibly* delaminating, it was = in fact very weak, enough so that the glue seeped through. <BR><BR>The whole = idea of using CA glue is that this substance will fuse together any = structurally weak parts of the block.  The other kinds of dope which are = merely intended to swell the wood cannot provide any structural strength = the way CA glue does. Upon doing the first rough tuning, each pin was stuck = hard and took some real muscle to move it.  But afterwards, the feel was = amazingly normal and smooth (not jumpy as might be expected) with = very high torque, about what you'd expect from a new pinblock. <BR><BR>The = hammers were worn enough to need replacing but the customer not having = enough to pay for that, I just decided to give them a good filing.  The let = off was about 1/2" but after a good knuckle bolstering job, it brought the = let-off right up to where it should be with a few hammers even blocking = slightly.  It lifted all the shanks off the rest rail too. Today, I'll go = over the regulation but I don't expect to have to do a lot.  I'll = give it two more tuning passes (a total of 4).  We had to overhaul the = pedal box but aside from that, just a few basics like this will bring the = old grand of fairly good design back to life for a few hundred dollars. <BR><BR>Another younger tech who is still learning the trade is participating and the customer himself did the doping.  We had = fans blowing full force with all the windows open to evacuate the fumes = which were pretty intense at times.  Like the recent thread on Spinet = Grommets, involving the customer of modest means and maybe another = tech who is learning the trade can be a way of lowering the costs to the = customer and having that person be really grateful. <BR><BR>Everyone enjoyed the = session, we broke for lunch and another couple of iced tea breaks which we'll = do again today and have a very well spent day.  Tonight, = undoubtedly, there will be music flowing from that house all evening long. <BR><BR></FONT><FONT lang=0 face=Arial color=#000000 size=2 FAMILY="SANSSERIF">Bill Bremmer RPT <BR>Madison, Wisconsin <BR><A href="http://www.billbremmer.com/">Click here: -=w w w . b i l l = b r e m m e r . c o m =-</A> = </FONT></FONT></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>