Adjusting a double (side by side) truss rod?

Asked by: Cynthia Hupke

How does a double truss rod work?

Dual-Action Truss Rod (Two-Way Rod)

The top bar is somehow fixed in length, and the lower bar is threaded on each end to allow it to expand or contract in length, based on which direction the nut is turned while adjusting the truss rod.

Which way do you turn truss rod to lower action?

Remember in a single action truss rod: tightening the rod (turning clockwise) straightens the neck, loosening (turning anti-clockwise) permits it to bow. Before you adjust the nut, make a mark on it that corresponds to a fixed point below it on the access channel to the nut.

How do you adjust a dual action acoustic truss rod?

And whenever I do a truss rod adjustment I like to do so under full string tension because ultimately that's how the necks going to live and that string tension plays. Such a big role in neck relief.

Which way to turn truss rod if action is too high?

Loosening a truss rod (turning counter-clockwise) adds relief to (decreases tension on) the neck which results in increased (higher) string action height. Loosening the truss rod is done to correct backbow.

How do you install a double action truss rod?

The truss rod should fit snugly into the channel and the top should be flush with the face of the neck. Use glue sparingly while gluing on your fretboard. So it doesn't run into the channel.

How do you adjust a truss dual action Fender Rod?

Back here that we're in so how this works is from where I'm standing now clockwise. Moving this direction will tighten the truss rod.

Can you adjust truss rod with strings off?

You only need to loosen your guitar strings before adjusting your truss rod if you want to tighten the truss rod. Tightening the truss rod creates extra tension on the strings, which can cause problems. If you want to loosen your truss rod, you don’t need to loosen your strings.

How long should you wait after adjusting truss rod?

It works well if you wait around 15-20 minutes between each turn. I found the most important thing was to just do about 1/4 turn at a time, and to use common sense, if you think your cranking it too hard, you probably are. As long as you feel it has more give, you should be good.

Can you over tighten a truss rod?

Turn the nut clockwise to tighten the rod. Loosening a truss rod nut can’t harm anything, but over-tightening can.

What to do when truss rod is maxed out?

I recommended a Heat Press and a Fret Level / Setup, which would get it in fighting shape. Since the truss rod was maxed out, and couldn’t get the neck any straighter, I first did a Heat Press on the neck, which I set up to introduce a good bit of back bow with no string tension and the truss rod completely relaxed.

How do I know if my truss rod is straight?

So, grab your guitar, sit the bottom of it on your foot and take a look at the E string while keeping it parallel to your legs. The lines generated by the string and the neck will tell you if the neck is straight or if it is convex or concave. These conditions can be fixed by adjusting the truss rod on your guitar.

What causes fret buzz?

Changes in humidity and temperature can commonly cause fret buzz. Fret buzz is a buzzing noise that occurs when the string vibrates against one or more of the frets. Sometimes you can experience fret buzz in the open position, and other times it could be specific strings and/or frets.

Do I glue in a truss rod?

Leave your clamps in place until the epoxy has properly cured. Prior to gluing the fretboard onto the neck, we suggest placing 3/4″-wide masking tape down the centerline of the neck, over the installed truss rod. Spread the glue evenly over the neck with a glue brush.

How do I know if my truss rod needs adjusting?

If you hear buzzing, or if the fret fails to sound a note, then your guitar neck has bowed upward toward the strings. This means that you need to loosen the truss rod.

How do you adjust a truss rod?

It's all very simple you turn the truss rod clockwise to tighten it and counterclockwise to loosen it what happens if you tighten it your neck and the trust wood will look like this.

How much should I adjust truss rod?

Don’t adjust too much at once. You’ll want to turn the truss rod about a a quarter of a turn at a time until you’re familiar with how your truss rod will react. Always re-tune the guitar before checking your adjustment. Don’t force anything.

Which way turn truss rod acoustic?

Which Direction to Turn the Truss Rod Bolt. When it comes to turning the truss rod bolt, just follow the old adage: righty-tighty (clockwise) and lefty-loosey (counter clockwise). That’s if you’re oriented so that you’re facing the truss rod bolt itself.

Does tightening truss rod lower action?

Turn the truss rod nut clockwise to counteract this condition. TRUSS ROD TOO TIGHT: When the truss rod is too tight, the neck bows backward. This lowers the string height and increases string buzz. Turn the truss rod nut counter-clockwise to counteract this condition.

How low should the action be on an acoustic guitar?

Measuring at the 12th fret (as in the photo), the action height should be 2.6 mm for Steel String Acoustic guitar, 1.8 for electric, 2.0mm for bass and 3mm for a Classical.