Neck angle

If you have a string instrument of any kind that needs fixing, a mistake you made in building a new instrument that you need to "disappear," or a question about the ethics of altering an older instrument, ask here. Please note that it will be much easier for us to help you decide on the best repair method if you post some pictures of the problem.

Neck angle

Postby Jeff Kittren » Fri Jul 15, 2016 7:22 pm

I have a neck angle of 8.85 on an SG style I'm building. What would
> be the mm measurement at the center of the bridge (to the body of
> the guitar) ?? do you know of a degree to mm height calculator? I
> used Tundramans neck angle calculator but it does not let you
> convert neck angle to mm height. Can you help?? Thank you
>
Jeff Kittren
 
Posts: 1
Joined: Fri Jul 15, 2016 1:51 pm

Re: Neck angle

Postby Dave Weir » Fri Jul 15, 2016 9:18 pm

Seems like you need more data. How high is the neck above the body at a particular point, say the 22nd fret?
What is the scale length? What the the range of height adjustment in the bridge. Assuming a straight neck, where do you want the action to be when the bridge is in the center of the range. I think if you have all that, the rest is trigonometry.
User avatar
Dave Weir
 
Posts: 105
Joined: Tue Jul 02, 2013 8:48 pm
Location: Escondido, CA

Re: Neck angle

Postby Gordon Bellerose » Sat Jul 16, 2016 2:14 pm

Yep. That angle does seem a bit steep.
With the neck installed, lay a straight edge on top of the frets, sticking out over where the bridge will be.
The bottom of the straightedge should be about where the lowest adjustment point on your bridge is.

As Dave said, there is a lot of information missing, that we would need to help.
I need your help. I can't possibly make all the mistakes myself!
Gordon Bellerose
 
Posts: 1079
Joined: Wed May 30, 2012 11:47 pm
Location: Edmonton AB. Canada

Re: Neck angle

Postby Brian Evans » Sat Jul 16, 2016 2:49 pm

My thought was "8.85 whats, surely not degrees". And then I thought "you have an SG in the basement, why not go down and look at it". So I did. It is a 1998 Epiphone SG whatever, the top of their line one with the Bigsby on it, made in Korea and I once looked up that the factory that made it won the Gibson award for best quality in 1998. So there you go. $225 in a punk record shop in Hamilton, used, on a hot day in July.

Neck angle is 2.25 degrees. Bridge height (action set quite low but plays great) is a wee tad under 5/8". Call it 15.5mm and it is your typical tune-o-matic bridge. My first ever good guitar was a 1968 SG with Vibrola. God only knows why I sold it. Probably to pay for a girlfriend... :(
Brian Evans
 
Posts: 712
Joined: Sat Aug 30, 2014 8:26 am
Location: Tatamagouche, Nova Scotia

Re: Neck angle

Postby Ryan Mazzocco » Sat Jul 16, 2016 4:52 pm

Brian Evans wrote:My first ever good guitar was a 1968 SG with Vibrola. God only knows why I sold it. Probably to pay for a girlfriend... :(


;) I hope she was worth it.
User avatar
Ryan Mazzocco
 
Posts: 529
Joined: Sat Feb 04, 2012 6:01 pm
Location: Joplin, MO

Re: Neck angle

Postby Dan Smith » Tue Jul 26, 2016 10:18 pm

Jeff,
For what it's worth, i'm building a couple of SG"s.
One has a TOM roller bridge, the other has a fixed intonation JR style bridge.
The end of the fretboards are above the flat part of the body about 1/32".
I did a mockup and used a bevel gauge to copy the angle.
I marked the where the end of the fretboard would be on the body, and placed my bridge where it should be located on the body based on scale length. I put a thin piece of wood under the bridge to simulate the thumbscrews. I placed the fretboard onto the body. I put a straight edge from the end of the fretboard to one of the middle bridge saddles and copied the angle with a bevel gauge.
My protractor shows about 3 degrees on both, but I don't know how accurate it is.
After I fretted the board and glued the neck in, the angle looks just right. I had to raise the bridge slightly to account for the fret height and clearance.
Dan
Ever-body was kung fu fight-in,
Them kids was fast as light-nin.
User avatar
Dan Smith
 
Posts: 328
Joined: Mon May 18, 2015 9:33 pm
Location: Texas


Return to String Instrument Repair: Practical and Political Issues

Who is online

Users browsing this forum: No registered users and 9 guests

Your purchase from these sites helps support the MIMForum, but only if you start at the links below!!!
Amazon music     Amazon books     Amazon tools     Rockler tools     Office Depot    

The MIMF is a member-supported forum, please consider supporting us with a donation, thanks!
 • Book store • Tool store • Links •