<!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 6.00.2800.1106" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV>I had posted a year ago: "Why do folks use pin driving fluid, = rosen, varnish, and whatever else? Do manufacturers use these things?" And = never got a definitive answer. The few reasons I was able to cull from 30 minutes = with the archives follows:</DIV> <DIV> </DIV> <DIV><EM>When the pin driving fluid has dried, it IS rosin!<G> AND = it does seal the<BR>block from outside contaminants. (SMOG, Salt air, etc.) = </EM></DIV> <DIV> </DIV> <DIV><EM>I found that ALL of the pins that were swabbed with the = =<BR>"Pin Driving Fluid" were consistantly smoother. Also, they had less =<BR>propensity(?) to "pop" and had a lower torque than those driven = "dry". =<BR>Several of the "dry" pins actually broke(!), where the pins with = "PDF", =<BR>in the same size holes, DID NOT!</EM></DIV> <DIV> </DIV> <DIV><EM>Nothing at all works quite well too with the current = cut<BR>thread pins if you can keep your hands clean and dry when stringing. The<BR>rosin et = all is just added assurance (buffer) toward establishing the = ideal<BR>interface. It's not the product, it's what the product does that counts.<BR>That's = really all there is to it. </EM></DIV> <DIV><EM></EM> </DIV> <DIV>Sealing the block from outside contaminants? Hmmmm. Breaking off = pins without PDF? - Shouldn't drilling the correct size hole solve that? Ron = N.'s explanation of how a PDF does its job is good, but implies that to = justify PDF use, you were running into jumpy pinblocks in the first place.</DIV> <DIV> </DIV> <DIV>Is that why folks use PDF - so they don't end up with jumpy pins? = How often does one run across jumpy pins on your own pinblocks? Is this not = controllable by drilling good holes and keeping things clean?</DIV> <DIV> </DIV> <DIV>Terry Farrell</DIV> <DIV> <SPAN id=__#Ath#SignaturePos__></SPAN> </DIV> <DIV>----- Original Message ----- <DIV>From: "Paul Chick (Earthlink)" <<A href="mailto:tune4@earthlink.net">tune4@earthlink.net</A>></DIV> <DIV>To: "Pianotech" <<A href="mailto:pianotech@ptg.org">pianotech@ptg.org</A>></DIV> <DIV>Sent: Saturday, June 21, 2003 10:56 PM</DIV> <DIV>Subject: RE: New Screws in New Pinblock</DIV></DIV> <DIV><BR></DIV>> <BR>> <BR>> -----Original Message-----<BR>> = From: <A = href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</A> [mailto:pianotech-bounces@ptg.org]On<BR>> Behalf Of Ron = Nossaman<BR>> Sent: Friday, June 20, 2003 10:30 AM<BR>> To: Pianotech<BR>> = Subject: Re: New Screws in New Pinblock<BR>> <BR>> <BR>> Considering the = positive reports from those using pin driving fluids when <BR>> stringing, = wouldn't the same fluid help in softening and lubricating the <BR>> pinblock temporarily for the screw installation?<BR>> <BR>> _Yes.<BR>> = <BR>> Paul C<BR>> _______________________________________________<BR>> = pianotech list info: <A href="https://www.moypiano.com/resources/#archives">http://www.ptg.org= /mailman/listinfo/pianotech</A></BODY></HTML>