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PostPosted: Sun Jan 31, 2010 3:13 pm 
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Koa
Koa
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Joined: Thu Jan 10, 2008 5:08 am
Posts: 1906
Location: Raleigh, NC
First name: Steve
Last Name: Sollod
Focus: Build
Status: Amateur
What is the best way to cut out a sound port? ...a router? ...some kind of saw? I figured I could place a template of the shape that I want to use, draw out the shape on the side, and cut it out some way... I'm just not sure how I should do it...
Steve

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PostPosted: Sun Jan 31, 2010 3:27 pm 
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Brazilian Rosewood
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Joined: Sat Jan 15, 2005 12:50 pm
Posts: 3933
Location: United States
My ports are generally round, and I use a Forstner bit, with a backing block on the inside. When I made a bigger oval one on a test mule I used a burr in the Dremel tool. It's easy to slip and mark up the side, so be careful. All's fair in love and lutherie.


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PostPosted: Sun Jan 31, 2010 4:26 pm 
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Koa
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Location: Raleigh, NC
First name: Steve
Last Name: Sollod
Focus: Build
Status: Amateur
Alan,
I was thinking an oval would be nice. I've seen several pictures of these posted. I have found that sometimes power tools can get away from you and it can be better to use manual tools. I could see how a fostner bit would work for a round sound hole. There must be different approaches that people take...

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www.swiftcreekguitars.com


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PostPosted: Sun Jan 31, 2010 4:29 pm 
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Koa
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Posts: 1383
Location: Canada
I think router.


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Milton, ON


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PostPosted: Sun Jan 31, 2010 4:34 pm 
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Joined: Fri Mar 24, 2006 12:42 pm
Posts: 2360
Location: Windsor Ontario Canada
First name: Fred
Last Name: Tellier
City: Windsor
State: Ontario
Zip/Postal Code: N8T2C6
Country: Canada
Focus: Build
Status: Amateur
I rough mine out with a carbide inlay cutter using my Stewmac dremel router base, (works like a Rotozip saw) and final shape with files and sand paper. My 1st was round and done like Al's but to me it looked like the entrance to a bird house so I went to a oval shape on the next 2.

Fred

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http://www.fetellierguitars.com
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PostPosted: Sun Jan 31, 2010 4:37 pm 
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Koa
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Joined: Wed Oct 10, 2007 2:47 am
Posts: 781
Location: Wauwatosa, WI, USA
Draw the design, use a forstner bit to cut a few good size holes, Dremel on Stewmac base with fishtail bit to get close, then switch to a sanding drum on the Dremel to fine tune it. and get smooth.


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PostPosted: Sun Jan 31, 2010 9:55 pm 
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Koa
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Posts: 1371
Location: Calgary, Canada
Status: Amateur
Depends what shape you're doing. this saw will cut any shape however. Sanding sticks and files to finish. It doesn't work however unless you cut the hole before the top is glued on. I use it for archtop F holes as well. http://www.leevalley.com/wood/page.aspx ... at=1,42884


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PostPosted: Sun Jan 31, 2010 10:00 pm 
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Koa
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Joined: Sat Jun 24, 2006 12:41 pm
Posts: 975
Location: United States
First name: Tracy
Last Name: Leveque
City: Denver
State: CO
Country: USA
Focus: Build
Status: Amateur
I've done it several ways, but I think the safest way for a beginner would be to drill a few holes in the design, then use a small sander in your dremel to sneak up on the line. Once you get close enough, a small mill file, and any other file can be used to get to the final shape. Then use sandpaper to clean up. It may take longer, but much less stressful. This is done after the rims are bent and the linings and blocks are glued in. Good luck!

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PostPosted: Sun Jan 31, 2010 10:13 pm 
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Joined: Wed Oct 08, 2008 11:36 am
Posts: 7473
Location: Southeast US
City: Lenoir City
State: TN
Zip/Postal Code: 37772
Country: US
Focus: Repair
I've only done one but it was a complex shape. I used a laminate trimmer with a 1/8" bit but I wouldn't recommend it unless you're pretty comfortable with the tool. It would be easy to make a big mess.

First I made a paper pattern and glued it on.
Attachment:
SoundportPattern.JPG


Made the raw cut with the laminate trimmer.
Attachment:
SoundPortOutsideRawCut.JPG


Clean up and beveled with sandpaper on a stick.
Attachment:
BeveledSoundport.JPG


Ebony and maple laminated backing.


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PostPosted: Mon Feb 01, 2010 5:53 am 
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Brazilian Rosewood
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Location: England
I just use a round soundport, and have found that the easiest solution to me has been a hole saw.

Colin

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PostPosted: Mon Feb 01, 2010 12:46 pm 
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I use a Dremel and a carbide "fishtail" bit, with a clear, smaller base that I made for this operation. Follow w/sanding drum on the Dremel, sanding sticks/handsanding to finish off. I leave my doublestick taped pattern on the guitar through the finishing.

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