<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html><head><style type="text/css"></style><title>Re: [CAUT] Double loop eye forming jig</title></head><body> <div>Jim,</div> <div><br></div> <div>Jig image below.</div> <div><br></div> <div align="center"><img src="cid:a06240809c4451305e816@[192.168.0.7].1.0"></div> <div align="center"><br></div> <div>The small block to the right of centre has a groove in it which allows the long knurled thumb-screw to tighten the block onto the wire, holding it in a centralised position while the two coils are formed around the pin by hand (using a pair of parallel pliers on the small 'crank' on the end of wire). The forming pin is removable, so that I can turn up a suitable pin for making coils to the desired diameter. There always will be some spring-back after the coil is formed, so the forming pin needs to be smaller than the desired final diameter. The springback will be less with thicker core wires, and vice versa. The small 'crank handle' on the end of the wire, and the bend at the coil, are formed with parallel jaw pliers before the wire is fitted to the jig. The knurled thumb-screw has a long shaft made to a specific length, which provides a ready reference for determining where to position the bends on the wire before making the eye, to provide just enough wire to make the job of hand winding the coils around the back length segment, then bending the tail back to an appropriate angle before cutting it to length. When cutting the tail to length, its a good idea to keep the cutter jaws parallel to the plane of the eye. This prevents the sharp edges of the cut-tail from damaging the paint work on the plate.</div> <div><br></div> <div>Ron O</div> <div><br></div> <div><br></div> <blockquote type="cite" cite><font face="Arial" size="-1" color="#000080">I'd sure like to see that jig for making them that tight. (I do it the old way with round-nose pliersŠ)</font></blockquote> <blockquote type="cite" cite><font face="Arial" size="-1" color="#000080"> </font></blockquote> <blockquote type="cite" cite><font face="Arial" size="-1" color="#000080">Thanks,</font></blockquote> <blockquote type="cite" cite><font face="Arial" size="-1" color="#000080">Jim Busby BYU</font></blockquote> <blockquote type="cite" cite><font face="Arial" size="-1" color="#000080"> </font></blockquote> <blockquote type="cite" cite> <hr size="2"></blockquote> <blockquote type="cite" cite><font face="Tahoma" size="-1"><b>From:</b> caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]<b> On Behalf Of</b> Ron Overs<br> <b>Sent:</b> Saturday, May 03, 2008 9:41 PM</font></blockquote> <blockquote type="cite" cite><font face="Tahoma" size="-1"><b>To:</b> College and University Technicians</font></blockquote> <blockquote type="cite" cite><font face="Tahoma" size="-1"><b>Subject:</b> Re: [CAUT] Bass bridge, string scale, cantilevered bridge, tone</font></blockquote> <div><br></div> <div><br></div> <x-sigsep><pre>-- </pre></x-sigsep> <div><font face="Times New Roman" size="+1" color="#0000FF"><b>OVERS PIANOS - SYDNEY</b></font></div> <div><font color="#000000"><i>   </i></font><font color="#0000FF"><i>Grand Piano Manufacturers</i></font><font color="#000000"><br> _______________________</font></div> <div><font size="-2" color="#000000"><br> </font><font color="#000000">Web http://overspianos.com.au</font></div> <div><font color="#000000">mailto:ron@overspianos.com.au<br> _______________________</font></div> </body> </html>