<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Verdana; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">I sent this yesterday, but it is not showing up.  I will re-send at the risk of having both posts appear... I apologize if they do.<div><br><div><br></div><div>On any upright, the bore is never calculated as below. Otherwise, as has been alluded, the hammer shank would be vertical when the hammer meets the string. A ballpark hammer bore determination for an upright would be: String to center pin distance less blow distance plus 5.5 mm (7/32").</div><div><div><br><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Verdana; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">Jurgen Goering<br>Piano Forte  Supply<br><a href="http://www.pianofortesupply.com/">www.pianofortesupply.com</a><br><br><br><br></span></div><br><div><div>On 2013-02-14,pianotech wrote:</div><div><br></div><blockquote type="cite"><div><span style="font-family: Verdana; color: rgb(0, 0, 0); font-size: 10pt; "><div><br></div></span><span class="Apple-style-span" style="font-family: monospace; white-space: pre; "> </span><span class="Apple-style-span" style="font-family: monospace; white-space: pre; ">Measuring the string to center pin distance and subtracting the blow </span><span class="Apple-style-span" style="font-family: monospace; white-space: pre; ">distance is not always the correct method to determine bore distance.</span></div></blockquote><div>and</div><blockquote type="cite"><div><span class="Apple-style-span" style="font-family: monospace; white-space: pre; ">Don't you measure from the string to center </span><span class="Apple-style-span" style="font-family: monospace; white-space: pre; "> </span><span class="Apple-style-span" style="font-family: monospace; white-space: pre; ">pin and subtract the blow distance? I thought that was it. Please correct me </span><span class="Apple-style-span" style="font-family: monospace; white-space: pre; ">if I'm wrong.</span></div></blockquote></div></div><div></div></div></div><br><br><br></span> </div> <br></body></html>