Thanks, Joe and David. As far as making a pattern for drilling from the old cap, I should think I'd be able to take a rubbing of the string grooves, no? Or probably better yet... it appears that the hole centers are directly opposite one another. Would that be a valid method to layout and/or verify hole placement? How do y'all layout a replacement bridge/cap when the original looks like mine does? Joe, I'm trying to find a local source for aircraft plywood but haven't had any luck. I can probably scrounge some Delignit from local techs, but may have to order something. Paul Bruesch Stillwater, MN On Sun, May 31, 2009 at 7:13 PM, David Love <davidlovepianos at comcast.net>wrote: > 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 > > > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090531/570c4445/attachment-0001.htm>
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