<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=iso-8859-1" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.19019">
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><STRONG><FONT size=2 face=Arial></FONT></STRONG> </DIV>
<DIV><FONT face=Arial><A title=ngravagne@gmail.com
href="mailto:ngravagne@gmail.com">Nicholas Gravagne</A> wrote;</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>"Could you tell us more of your technique in its use. I
imagine that the slow speed of the cordless is an advantage as to control. Also,
something of the size of the bobbin. I assume you used spray glue then carefully
wrapped sandpaper on the bobbin. What about the seam? This seems easier said
than done. ">></FONT></DIV>
<DIV><STRONG><FONT size=2 face=Arial></FONT></STRONG> </DIV>
<DIV><STRONG><FONT size=2 face=Arial>I never re-shape hammers without removing
them; normally if they're in such bad condition that they have to be reshaped,
the flanges need re-pinning anyway. This tool can be vicious so you must clamp
it in a vise and hold the hammer in your hand. Better to use 2 hands for better
control .... and your third hand to press down on the power button
.... if you can manage that! Make sure the drum is rotating in the right
direction. Luckily the cordless screwdriver has a reverse switch, unfortunately
not an "undo" switch.</FONT></STRONG></DIV>
<DIV> </DIV>
<DIV><STRONG><FONT size=2 face=Arial>I glued the sandpaper using impact glue,
but I tapered the joint instead of using a butt joint, the same way they make
the cardboard tubes on toilet rolls.</FONT></STRONG></DIV>
<DIV><STRONG><FONT size=2 face=Arial></FONT></STRONG> </DIV>
<DIV><FONT size=2 face=Arial><FONT size=3>"Also, RE the bit inserted into the
bobbin: I can see drilling a slightly undersized hole at the drill press, but
your insertion of the bit must be perfect or you will end up with an
out-of-round spinning bobbin. ">></FONT><BR><BR></FONT></DIV>
<DIV><STRONG><FONT size=2 face=Arial>The bobbin is a standard size cotton reel
for domestic sewing machines so the hole is already there and just happens to
fit the standard screwdriver bit. I did insert one of those aluminium tuning pin
bushings, which also just happens to fit, that the supply houses sell to
make it really tight;</FONT></STRONG><STRONG><FONT size=2 face=Arial> it's the
only time I've ever used one! Perfectly centred with no eccentricities. (Hmnn,
Eccentricity sounds like the name of a town where some of us might
live)</FONT></STRONG></DIV>
<DIV><STRONG><FONT size=2 face=Arial></FONT></STRONG> </DIV>
<DIV>"Reel & Bobbin Hammer Shaper">></DIV>
<DIV> </DIV>
<DIV><STRONG><FONT size=2 face=Arial>I would prefer to call it the Groovy Hammer
Humdrum!</FONT></STRONG></DIV>
<DIV><STRONG><FONT size=2 face=Arial></FONT></STRONG> </DIV>
<DIV><STRONG><FONT size=2 face=Arial>When gang filing hammers manually I place
about six or seven at a time in a vise with the flanges off and use a block
sander. Of course remember you have to sand towards the nose of the hammer from
each side. </FONT></STRONG></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>AF</DIV>
<DIV> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=ngravagne@gmail.com href="mailto:ngravagne@gmail.com">Nicholas
Gravagne</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=forsyth93@btinternet.com
href="mailto:forsyth93@btinternet.com">Alan Forsyth</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, March 13, 2011 3:59
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [pianotech] Cosmetic aspects
of filed hammers</DIV>
<DIV><BR></DIV></BLOCKQUOTE></BODY></HTML>