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PostPosted: Tue Apr 24, 2007 1:49 pm 
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Brazilian Rosewood
Brazilian Rosewood
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Joined: Sun Feb 27, 2005 10:11 am
Posts: 2176
Hi Guys and Gals.
Here is the way I make my classical bridges.

First I cut the blank to exact width and length and flatten or arch the bottom of the blank and draw two lines to delineate the edges of the tie block:






Then I cut at the lines to the depth of my wings (5/16") on the table saw:





Then I make multiple cuts at that depth to waste away the remaninder of the wood:




Then I use double stick tape to attach the blank to a board so I can keep my hannds clear of the router bit:



I am using my trusty pin router for the next operations,but a table mounted router would also work.

I set the pin router so the saddle slot is 3/16" from the front edge of the bridge-I am using a 3/32" end mill.

Here is a my pin router. It is a 70's vintage Delta with a pedal that raises and lowers the table.They discontinued this machine.I bought it for $400. You can also switch the motor to the bottom and us it as a router table.

Here I am routing the saddle slot:






Next I rout two 1/16" deep slots for the tie block inlay:







Next,I carve the ramp at the back of the saddle,carve the bridge wings and carve the end facets:









24_223326_DSC_0058_Medium.JPG">


Then I sand two pieces of ivory and glue them into their slots:









The last step is to drill the holes for the strings.
I use an adjustable vice on my drill press in order to get the correct angle:






Here is the finished bridge:




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PostPosted: Tue Apr 24, 2007 2:09 pm 
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Brazilian Rosewood
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Joined: Thu Oct 06, 2005 1:05 pm
Posts: 3350
Location: Bakersville, NC
Focus: Build
Status: Professional
Great stuff!
Thanks for taking the time.

_________________
Peter M.
Cornerstone Guitars
http://www.cornerstoneukes.com


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PostPosted: Wed Apr 25, 2007 1:30 am 
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Koa
Koa

Joined: Sun Jun 12, 2005 9:38 am
Posts: 1059
Location: United States
Nice tutorial, Brad! I do essentially the same thing, cept I use a milling machine instead of a pin router. To "carve" the bridge wings and end facets I use a four-in-hand followed up with a detailing file, and then a fine-toothed flat file. 220-grit sandpaper wrapped around a small block of wood works well for final smoothing of the wings while still preserving the sharp curved edges of the end bevels.

Best,

Michael

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PostPosted: Wed Apr 25, 2007 1:52 am 
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Cocobolo
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Joined: Thu Jun 22, 2006 4:09 am
Posts: 326
Location: United States
Very nice tutorial! Thanks for all the pics for all us visual learners.


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PostPosted: Wed Apr 25, 2007 5:28 am 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Tue Feb 15, 2005 10:31 am
Posts: 3134
Location: United States
Thanks Brad! So, what is the "correct angle" of your string holes? 10deg. seems to be used a lot.


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PostPosted: Wed Apr 25, 2007 7:51 am 
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Brazilian Rosewood
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Posts: 2176
Carlton,
I never measured the angle.
I start the holes 1/8" from the bottom of the bridge and eyeball the angle so the holes emerge at the bottom of the "ramp".


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PostPosted: Thu Apr 26, 2007 6:09 am 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Tue Feb 15, 2005 10:31 am
Posts: 3134
Location: United States
Thanks Brad. Makes sense.


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