[pianotech] Repairing Bridge

[David Love]

Sounds good but I would probably not try and make a pattern from that old
cap.  Just lay it out from scratch.  Not hard.

 

David Love

www.davidlovepianos.com

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Joseph Garrett
Sent: Sunday, May 31, 2009 3:35 PM
To: pianotech
Subject: [pianotech] Repairing Bridge

 

Paul said: 

Thanks Ron... I'll do that. The original bridge is slightly less than

1.375", so I reckon I won't have to glue slabs together as long as I start

with 1.375" or thicker stock.

 

Thanks everyone!

 

Paul,

The best way to fix it is: 1. take measurements at each end and the middle
of the overall thickness of the bridge. 2. Slice off the top of the bridge
with a fence on the band saw. Suggest taking just slightly less than 1/2" of
the top of the bridge off. 3. Make a piece of stock slightly thicker then
1/2" thick , )I use aircraft plywood for this, but you can use delignit if
you have), and glue it back on the bridge. (this piece should be approx. the
same shape, so that trimming will not be a chore.) 3. With a horizontal
sander, thickness the bridge back to the original dimension. 4. From the
pattern, that you made before you started all of this, transfer the original
pin/string spacing to the new bridge cap surface. 5. drill the cap for the
appropriate sized bridge pins. 6. Shape the bridge to the proper termination
bevels. Use a fine wood rasp for this operation, not a chisel! 7. Mask off
the bridge top and sand the entire bridge. Finish with a good varnish or
laquer. 8. Remove masking and insert bridge pins using a 3/32" Nail Set to
do the final seating. 9....Yer Not done yet! 10.....Reinstall the bridge.
11. Let glue set up properly and re-install the strings, bring to tension
and seat strings on hitches and bridge surface. 11. Now you're done.

Regards,

Joe

 

 

Joe Garrett, R.P.T. (Oregon)

Captain, Tool Police

Squares R I

 

 

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