<!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 6.00.2900.2912" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>A torque wrench bought at an auto supply store will be calibrated in foot-pounds. The torque wrench I have for measuring tuning pin torque is calibrated in inch-pounds. I think a safe assumption is that tuning pin torque wrenches sold by piano supply houses are calibrated in inch-pounds.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">Thus it seems the common unit we use is simply the string tension (150 lbs.), while the proper (?) equivalent in torque would be 18.75 "pound-inches".  Yet the torque wrenches we use for tuning pins are calibrated in pounds... right?</DIV> <DIV> <P><FONT size=2>--Cy--</FONT></P></DIV></BLOCKQUOTE></BODY></HTML>