in-the-home boring jig

[David ilvedson]

A very precise method, but a bit slow, involves dissolving the 
glue joint with wallpaper remover/heat and turning in a drywall 
screw into the broken shank in the head or butt.  The drywall 
screw is heated with a match or lighter.  Then with the upright 
hammer head extractor and the clamp that comes with it 
extract the broken piece.  I have tried this a few times but 
always go back the 7/32 bit in a handle and eye it.  I believe a 
detailed accounting of this method is in the Journal 
somewhere.  I think it was developed my Margie Williams & 
Mark Anderson in the Bay Area.    

David Ilvedson, RPT

From:           	bases-loaded@juno.com
To:             	pianotech@ptg.org
Date sent:      	Mon, 24 Jan 2000 22:54:02 -0500
Subject:        	in-the-home boring jig
Send reply to:  	pianotech@ptg.org

> I am looking for any ideas that will facilitate boring single hammers in
> the customer's home when the shank has broken off bluntly right below the
> hammer head (vertical pianos).  I have trouble precisely reproducing some
> of the angles, especially the compound angles.  I have been using the
> inexpensive adjustable maple jig for years - sometimes successfully,
> sometimes less so.
> 
> What have some of you found to be a successful approach to this problem? 
> I have found that fairly substantial tonal difference can arise when the
> angle of the hammer changes, even when the strike point is maintained.
> 
> Any and all suggestions welcomed!
> 
> Mark Potter
> bases-loaded@juno.com  
> 


David Ilvedson, RPT
Pacifica, CA
ilvey@jps.net