Bert, I’m not familiar with Diamond brand tuning pins but there are several things that I am aware of that can result in slipping wire: n Large holes through the pins. Many tuning pins have holes that are too small to accommodate the 0.063” (1.6 mm) diameter wire used by some for the core wire of the lowest mono-chord bass strings. If one is to use wire of this diameter it is necessary to drill out the hole of a few pins. In years past—many years past—some pins came with holes large enough for the largest core wires ever conceived by the devious minds of the piano designers of a century or so back. Smaller treble wire wound on these pins—especially nickel plated pins with their lower surface friction—tended to pull out. Tuning pin makers responded by making the holes smaller ending one problem but making it necessary for traditional makers and rebuilders to drill out a few pins. n Plating through the hole. In addition to the bend at the hole wire depends on a certain amount of friction to hold it in place. If the plating was done after the hole was drilled or punched the surface might be too slick to hold the wire. n Rounded edges. Depending on how the hole in the pin was put there it is possible for one end of the whole to have a slightly rounded edge. This, along with a slick, plated surface, can cause smaller wires to slip out of the hole. ddf Delwin D Fandrich Piano Design & Fabrication 620 South Tower Avenue Centralia, Washington 98531 USA del at fandrichpiano.com ddfandrich at gmail.com Phone 360.736.7563 From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Albert Picknell Sent: Thursday, February 04, 2010 9:46 AM To: caut at ptg.org Subject: Re: [CAUT] Slipping Beckets Hi Gerry, David I've been using the nickel plated pins. The beckets are long enough, and my coiling technique is no different from one brand of tuning pins to another, but the incidence of slippage with other brands has been zero. It may be I just need to be a little more attentive with the Diamond brand pins, as they will show up even the slightest imperfection in the bend. Not gonna do the Baldwin thing. Cheers, Bert --- On Wed, 2/3/10, G Cousins <cousins_gerry at msn.com> wrote: From: G Cousins <cousins_gerry at msn.com> Subject: Re: [CAUT] Slipping Beckets To: "CAUT" <caut at ptg.org> Received: Wednesday, February 3, 2010, 12:16 PM Albert, David is spot on. Make sure that the becket is at length and wire correct at the TP hole. That being said... I recall an instance where the beckets were slipping. The TP hole seemed to have some lubricity. Perhaps from short degreasing of the cutting oils in the factory. Thought I can't be certain. The issue was resolved by running an additional 1-2mm piece of wire beyond the pin (hole) and bending it opposite of the winding direction. This was similar to a practice used by Baldwin. I believe,they used a mechanical stringing device. Others on the list might be able to confirm teh equipment used. This technique effectively makes Z through the pin. Although I personally don't care for the finished look, it did stop the issue without having to totally repin. Gerry C WCUPA _____ From: davidlovepianos at comcast.net To: caut at ptg.org Date: Wed, 3 Feb 2010 08:55:32 -0800 Subject: Re: [CAUT] Slipping Beckets I haven’t had that problem. Are you using blued or nickel and are you sure that the beckets are extending far enough through? David Love www.davidlovepianos.com From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Albert Picknell Sent: Wednesday, February 03, 2010 8:13 AM To: CAUT List Subject: [CAUT] Slipping Beckets Greetings, List In most respects I really like Diamond brand tuning pins, especially their consistency in size. However, since I began restringing pianos with them, I have had to replace anywhere from one to six treble strings per piano because beckets have slipped. I've never had this happen before, and I'm wondering whether anyone else has had a similar experience. Cheers, Albert _____ The new Internet Explorer® 8 - Faster, safer, easier. Optimized for Yahoo! <http://downloads.yahoo.com/ca/internetexplorer/> Get it Now for Free! _____ The new Internet Explorer® 8 - Faster, safer, easier. Optimized for Yahoo! <http://downloads.yahoo.com/ca/internetexplorer/> Get it Now for Free! -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20100204/4ffd958e/attachment.htm>
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