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 Post subject: Cutting soundhole
PostPosted: Fri Jan 19, 2024 4:34 pm 
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Mahogany
Mahogany

Joined: Thu Jan 12, 2017 6:14 am
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First name: Jon
Last Name: Snider
City: Colorado Springs
State: Colorado
Focus: Build
Status: Amateur
I’m curious how many rout out their soundhole after final thicknessing of the top, vs other techniques? I’ve read somewhere of someone routing it out befor final thicknessing (obviously only the back side) and the cut out falling out after a certain thickness vs depth of cut is reached.


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 Post subject: Re: Cutting soundhole
PostPosted: Fri Jan 19, 2024 4:54 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Wed Feb 20, 2008 7:15 pm
Posts: 7378
First name: Ed
Last Name: Bond
City: Vancouver
Country: Canada
Focus: Build
Status: Professional
After thicknessing for me. I install my rosettes in a .070 channels. I use the same bit in the same router to cut the sound hole. First cut is still .070, then flip the top and route the rest of the way through from the back…



These users thanked the author meddlingfool for the post (total 2): Duct Tape (Sat Jan 20, 2024 8:54 am) • Kbore (Fri Jan 19, 2024 6:12 pm)
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 Post subject: Re: Cutting soundhole
PostPosted: Fri Jan 19, 2024 5:48 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Sat Jan 15, 2005 12:50 pm
Posts: 3927
Location: United States
I inlay the rosette, thickness the top, glue on a 'doubler' around the hole, and then cut the hole through the doubler and the top at the same time. The doubler and the braces around the hole go out as far as the edges of the rosette to reinforce the top there.



These users thanked the author Alan Carruth for the post (total 3): Duct Tape (Sat Jan 20, 2024 8:54 am) • Pmaj7 (Fri Jan 19, 2024 6:40 pm) • Kbore (Fri Jan 19, 2024 6:11 pm)
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 Post subject: Re: Cutting soundhole
PostPosted: Fri Jan 19, 2024 6:58 pm 
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Joined: Mon Apr 16, 2012 12:47 pm
Posts: 2520
First name: Jay
Last Name: De Rocher
City: Bothell
State: Washington
- Thickness the top
- Install the rosette and soundhole binding
- Level the rosette and soundhole binding
- Rout out the soundhole

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 Post subject: Re: Cutting soundhole
PostPosted: Fri Jan 19, 2024 7:15 pm 
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Joined: Wed Oct 08, 2008 11:36 am
Posts: 7375
Location: Southeast US
City: Lenoir City
State: TN
Zip/Postal Code: 37772
Country: US
Focus: Repair
After final thicknessing here too.

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 Post subject: Cutting soundhole
PostPosted: Fri Jan 19, 2024 11:49 pm 
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Brazilian Rosewood
Brazilian Rosewood
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First name: Brad
Last Name: Combs
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Sometimes I do this thing where I inlay a solid ring as the sound hole binding. I do this before final thickness when the top is at ~.140. I make sure the ring is around .125 which will be thicker than the final top. Once the ring is inlaid I cut the sound hole which is a smaller diameter than the ring by .060 leaving a .030” sound hole binding.

Sounds difficult but it’s just difficult to type. :) Here are a couple pics.

Image

Image

Otherwise, after final thickness. I learned the inlaid sound hole binding here. I can’t remember who shared it, maybe Terry Kennedy, cannot remember. :)

Actually, here is where I saw it, from Jay and he attributed Rick Davis - viewtopic.php?f=10101&t=49844&start=25

Brad


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These users thanked the author bcombs510 for the post (total 2): Kbore (Wed Feb 21, 2024 11:44 am) • Duct Tape (Sat Jan 20, 2024 8:58 am)
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 Post subject: Re: Cutting soundhole
PostPosted: Mon Feb 19, 2024 12:33 pm 
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Mahogany
Mahogany

Joined: Thu Jan 12, 2017 6:14 am
Posts: 84
First name: Jon
Last Name: Snider
City: Colorado Springs
State: Colorado
Focus: Build
Status: Amateur
meddlingfool wrote:
After thicknessing for me. I install my rosettes in a .070 channels. I use the same bit in the same router to cut the sound hole. First cut is still .070, then flip the top and route the rest of the way through from the back…


Where does that leave you top thickness? Obviously at least a little under .140” (3.5mm), maybe more.

And perhaps this is a rough thickness snd your final is even less? Thanks


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 Post subject: Re: Cutting soundhole
PostPosted: Mon Feb 19, 2024 12:37 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Wed Feb 20, 2008 7:15 pm
Posts: 7378
First name: Ed
Last Name: Bond
City: Vancouver
Country: Canada
Focus: Build
Status: Professional
always well under .140…


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