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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>the friction resistance torque of the pinblock is the friction force times the radius of the pin. So for a given interference friction, the larger diameter pin will have more resistance torqe. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:20.0pt;font-family:"Lucida Calligraphy";color:navy'>Dean</span></b><b><span style='font-size:20.0pt;font-family:"CAC Leslie";color:navy'><o:p></o:p></span></b></p><p class=MsoNormal style='margin-bottom:3.0pt'><span style='font-size:10.0pt;font-family:AGaramond;color:navy'>Dean W May (812) 235-5272 voice and text <o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:3.0pt'><span style='font-size:10.0pt;font-family:AGaramond;color:navy'>PianoRebuilders.com (888) DEAN-MAY </span><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:AGaramond;color:navy'>Terre Haute IN 47802</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] <b>On Behalf Of </b>Noah Frere<br><b>Sent:</b> Wednesday, March 06, 2013 4:13 PM<br><b>To:</b> pianotech@ptg.org<br><b>Subject:</b> Re: [pianotech] Size of Pinblock Drill bit?<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Good point both of you on the brad point. Why 1/0? From what i understand, it has a nicer feel because of the decreased surface area contact with the wood. Plus it leaves more room for coils and string clearance. Plus they're less expensive i think (though that is an after-thought). Plus i like fine things. Thinner is finer :) Any reason why not?<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Wed, Mar 6, 2013 at 3:56 PM, Ron Nossaman <<a href="mailto:rnossaman@cox.net" target="_blank">rnossaman@cox.net</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal>On 3/6/2013 1:57 PM, Noah Frere wrote:<o:p></o:p></p><p class=MsoNormal>I searched my not inconsiderable archives for an answer, but have come<br>up empty-handed. I am using 1/0 Denro blued tuning pins in a new<br>multi-lam Maple pinblock, and need to order the drill bit. I'd like to<br>double-drill - makes sense. The Pianotek catalog recommends, in effect,<br>a drill bit .016" to .021" under the diameter of a 2/0 pin in a<br>multi-lam pinblock. Following that logic, I could use the .250" on the<br>first pass, and the .261" (.015" under) or .257" (.019" under) drill bit<br>on the second pass. Also, I like the idea of the brad-points, but also<br>like the idea of the other ones, which are "slow spiral." Any<br>recommendations?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal>You can't use brad points on the second pass anyway, so decide if they will get you anything desirable on the first and buy accordingly. Slow spiral, definitely, particularly on the second pass. The 0.250" should be fine for the first pass. As to final size, as Greg said, test - etc.<br><br>Why 1/0?<br><br>Ron N<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>No virus found in this message.<br>Checked by AVG - <a href="http://www.avg.com">www.avg.com</a><br>Version: 2013.0.2899 / Virus Database: 2641/6147 - Release Date: 03/04/13<o:p></o:p></p></div></body></html>