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 Post subject: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 11:21 am 
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Cocobolo
Cocobolo

Joined: Fri Nov 16, 2007 6:06 am
Posts: 329
What method do you use to glue/clamp your bridge?

I see some people use clamps with long throat and some use clamp jig thru the pin holes. Pros and Cons of each?

Thanks, David


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 12:00 pm 
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Old Growth Brazilian
Old Growth Brazilian

Joined: Tue Dec 28, 2004 1:56 am
Posts: 10707
Location: United States
One deep throated "C" clamp and a home made bridge clamping caul patterned after the Stewmac bridge clamping caul


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 2:27 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Wed Jan 19, 2005 5:23 am
Posts: 2356
Location: United States
I used to use the clamps through the soundhole until I used a vacuum clamp. There was no turning back.


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 2:29 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Wed Jan 19, 2005 5:23 am
Posts: 2356
Location: United States
I used to use the clamps through the soundhole until I used a vacuum clamp. There was no turning back.


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 2:46 pm 
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Koa
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Joined: Wed Jan 30, 2008 11:16 pm
Posts: 718
Has anyone made a home-made C clamp out of plywood for this? Could it be made strong enough?

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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 2:50 pm 
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Mahogany
Mahogany

Joined: Tue May 13, 2008 10:07 pm
Posts: 73
First name: Matthew
Last Name: Stanwood
City: Yarmouth
State: Nova Scotia, Canada
for the next one I plan to use the LMI 'fox bridge clamp' but haven't used it before. Seems like a simple enough method anyways

Matt


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 3:00 pm 
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Walnut
Walnut

Joined: Wed Apr 30, 2008 7:32 pm
Posts: 24
I made a cam clamp once to glue the bridge on a soprano ukulele. It wasn't hard to make out of scrap wood and a little 3/4 by 1/8 inch steel. Since I made it for this uke, I designed it to clear the top braces. It worked well.
Doug


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 3:03 pm 
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Koa
Koa

Joined: Wed Jun 01, 2005 6:35 am
Posts: 1325
Location: Kings Mtn., NC, USA
First name: Bill
Last Name: Greene
City: Kings Mountain
State: North Carolina
Zip/Postal Code: 28086
Country: USA
Focus: Build
Status: Amateur
Ditto on the vacuum clamp. Easy, thorough, etc.

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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 3:04 pm 
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Old Growth Brazilian
Old Growth Brazilian

Joined: Tue Dec 28, 2004 1:56 am
Posts: 10707
Location: United States
Frei wrote:
Has anyone made a home-made C clamp out of plywood for this? Could it be made strong enough?
with the right treaded inserts you could make one but I assume you mean on that is both the clamp and lower and upper caul all in one but the cost of a single C-clamp and build your own upper win adjustable caul from ply, inserts screws and cork and a ply bridgeplate caul would far less work.


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 3:21 pm 
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Cocobolo
Cocobolo
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Joined: Sun Jan 09, 2005 8:49 am
Posts: 389
Here is one of the clamps I use:


You do not have the required permissions to view the files attached to this post.

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http://www.wellsguitars.com


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 3:39 pm 
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Contributing Member
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Joined: Mon Jan 03, 2005 7:46 am
Posts: 1315
Location: Branson, MO
First name: stan
Last Name: thomison
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State: mo
Zip/Postal Code: 65616
Country: united states
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As Robbie, did the clamps and for last 3 years vacuum, never do to it any other way (well unless breaks or run out of power, so good to know both)


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 4:28 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Tue May 13, 2008 10:44 am
Posts: 6262
Location: Virginia
I always use two bolts through the 1'st and 6th string holes that are the exact same size as the hole and lightly tighten them to hold for positioning and then use 3 clamps with cauls shaped for the wings and the center.


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 5:03 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Dec 14, 2007 3:21 pm
Posts: 3445
Location: Alexandria MN
I started with a central clamp and caul with two long clamps on the wings. Now I use the StewMac clamp. Pretty much the same principle as Sylvan's cool clamp. Quick, so it works well for hide glue. Plenty of access for clean up. You need a rigid central clamp or else the outrigger screws can spring the central clamp open and reduce the pressure.
I hold the bridge with two brads in the saddle slot. Drilling the holes before gluing as you have to do with the Fox clamp never appealed to me.
Terry

Image

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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 5:07 pm 
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Old Growth Brazilian
Old Growth Brazilian

Joined: Tue Dec 28, 2004 1:56 am
Posts: 10707
Location: United States
Terence Kennedy wrote:
I started with a central clamp and caul with two long clamps on the wings. Now I use the StewMac clamp. Pretty much the same principle as Sylvan's cool clamp. Quick, so it works well for hide glue. Plenty of access for clean up. You need a rigid central clamp or else the outrigger screws can spring the central clamp open and reduce the pressure.
I hold the bridge with two brads in the saddle slot. Drilling the holes before gluing as you have to do with the Fox clamp never appealed to me.
Terry

Image


Yep my rig is the same but I made ny own bridge caul


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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 5:21 pm 
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Contributing Member
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Joined: Fri Aug 26, 2005 5:49 pm
Posts: 2915
Location: Norway
I use the same set up as Terence. I can't tell from the picture if he has removed the plastic cap on the end of the clamp screw, which I did. The end of the screw is ball shaped, and I drilled a matching shallow "dent" in the middle of the bridge wing clamp. This will keep the screw on the C-clamp centered on the bridge clamp and keep it from moving as you apply pressure. One more thing to keep in mind with this set up is that you need fairly rigid bridge plate caul to counter the pressure over the bridge wings, to avoid distorting these areas during clamping.

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 Post subject: Re: Bridge clamp...how?
PostPosted: Wed Feb 25, 2009 8:06 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Fri Dec 14, 2007 3:21 pm
Posts: 3445
Location: Alexandria MN
Yep I removed the plastic thing and drilled a recess in the caul for the ball end of the clamp. I think I got the idea from a post by Arnt!! I just use a 3/4" caul exactly the same shape as the bridge plate with a radius on the soundboard side. I don't have any outriggers that span the X and come up under the wings. (Used to when I used three separate clamps) Do any of you guys do that?
Terry

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