<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="State"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style> </head> <body lang=EN-US link=blue vlink=blue> <div class=Section1> Hi Alan,<o:p></o:p> <o:p> </o:p> Bolduc blocks are very forgiving, compared to say, delignit, when it comes to variations in hole size. If you drilled the block yourself, I would consider very strongly changing something in your procedure before you drill another. I would NOT contaminate the block with anything. Pull the offending pins and go up one size. Do one at a time and make notes about where you put them, because you probably won’t be able to find them a month from now. <o:p></o:p> I am just fitting a new bolduc hybrid block,( first I’ve tried) and will perform a few tests before I commit to drilling at my regular speed and length of time in the hole. I tried the hybrid block with the small laminations because of the insane amount of fitting that this particular block requires. The flange, which is curved, slants in the opposite to normal direction, plus has an angled section, which is not consistent in size nor angle, that comes up from the tuning pin field, about an inch across that I decided to fit almost as well as the flange. The original block though beautifully fit to the flange, had all kinds of inconsistent space between the angled flange and the webbing. I’m not really sure why it failed, but it may have to with the “rebuilding” this piano suffered twenty years ago. <o:p></o:p> <o:p> </o:p> Back to your problem. Do you know what size drill bit, and at what rpm’s the block was drilled at? If it helps, I drill Bolduc blocks at 1250 rpm. using an air cooled .257 high helix drill bit, as fast as possible, about 4 to 5 seconds in the hole. I drill with the block fitted, and attached to the plate. I would really be interested in knowing what procedure and techniques were used. Maybe I’m just lucky but I’ve always had wonderful results with A. Bulduc’s pinblocks.<o:p></o:p> <o:p> </o:p> As with any advice, take what you need and discard what doesn’t work for you. <o:p></o:p> <o:p> </o:p> Good Luck,<o:p></o:p> <o:p> </o:p> Owen J. Greyling<o:p></o:p> <o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: <st1:PersonName w:st="on">pianotech-bounces@ptg.org</st1:PersonName> [mailto:<st1:PersonName w:st="on">pianotech-bounces@ptg.org</st1:PersonName>] On Behalf Of reggaepass@aol.com Sent: Tuesday, June 03, 2008 4:33 PM To: pianotech@ptg.org Subject: Re: CA Glue for pin blocks<o:p></o:p> </div> <o:p> </o:p> A matter related to this thread:  I have a client with a recently rebuilt piano, including a new (Bolduc) pinblock.  The torque is acceptable on many/most of the tuning pins, but is too low on several.  The low-torque pins are not so loose as to not hold (at least, not yet), but make it harder to tune accurately and, especially, to get into a good groove as one moves along from string to string. <o:p></o:p> <div> <o:p> </o:p> </div> <div> So the question is: Should I use CA on the looser pins, even though this is an otherwise healthy, new block (I'm guessing some drilling discrepancies are the culprit), or would CA now present problems when we restring again (on this same block) down the road?  And, if I should <st1:place w:st="on"><st1:City w:st="on">NOT</st1:City> <st1:State w:st="on">CA</st1:State></st1:place> it, what then?<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> Thanks,<o:p></o:p> </div> <div> <o:p> </o:p> </div> <div> Alan Eder <o:p></o:p> </div>  <div id=u8CA93D0333E35A2-E10-1330> <div class=MsoNormal align=center style='margin-top:7.5pt;text-align:center'> <hr size=2 width="100%" align=center> </div> Stay informed, get connected and more <a href="http://mobile.aol.com/productOverview.jsp?productOverview=aol-mobile-overview&?&ncid=aolmbd00030000000139" target="_blank" title="http://mobile.aol.com/productOverview.jsp?productOverview=aol-mobile-overview&?&ncid=aolmbd00030000000139">with AOL on your phone</a>. <o:p></o:p> </div> </div> </body> </html>