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> The Dreaded Truss Rod
DeepRoots
post Oct 9 2007, 09:51 PM
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Hey guys- i wanted to lower my action- so after playing with the bridge i'm now trying to adjust the truss rod.

Should i be feeling much resistance when tightening? I'm trying to be carefull as i know i can break the neck if i tighten it too much- but the "bit" i'm sticking the allen key in feels all loose and wobbles about alot.

When tightening it feels like there is no resistance.

I want to tighten it up but i hope you guys can tell me when to stop!

Thanks

DeepRoots
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Andrew Cockburn
post Oct 9 2007, 10:16 PM
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Stop!

Tightening the truss rod isn't specifically for lowering the action, it affects the curvature of the neck - it should be set so it is straight, then you need to work with the bridge.


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DeepRoots
post Oct 9 2007, 10:18 PM
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Turns out the little silver thing i was turning wasnt screwed in to the truss rod properly.

Could have really screwed things up there- thanks for the save Andrew.
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Andrew Cockburn
post Oct 9 2007, 10:19 PM
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Phew - glad I got to you in time smile.gif The truss rod is the only thing you can really damage your guitar by adjusting, the rest can be fixed by a guitar tech.

This post has been edited by Andrew Cockburn: Oct 9 2007, 10:20 PM


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MickeM
post Oct 9 2007, 10:32 PM
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QUOTE (DeepRoots @ Oct 9 2007, 10:51 PM) *
Hey guys- i wanted to lower my action- so after playing with the bridge i'm now trying to adjust the truss rod.

Should i be feeling much resistance when tightening? I'm trying to be carefull as i know i can break the neck if i tighten it too much- but the "bit" i'm sticking the allen key in feels all loose and wobbles about alot.

When tightening it feels like there is no resistance.

I want to tighten it up but i hope you guys can tell me when to stop!

Thanks

DeepRoots

If you're going to set the action the truss rod should actually be adjusted first or else you'd first be setting the action on an incorrectly convex/straight/concave neck and have to do it all over after adjusting the truss rod

This post has been edited by MickeM: Oct 9 2007, 10:32 PM


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mattacuk
post Oct 9 2007, 11:19 PM
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I dont even know what a Truss Rod is - how embarassing! mellow.gif


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MickeM
post Oct 9 2007, 11:26 PM
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QUOTE (mattacuk @ Oct 10 2007, 12:19 AM) *
I dont even know what a Truss Rod is - how embarassing! mellow.gif

It's a metal rod that's inside your neck (guitars' neck) and it's there to keep the neck straight (or slighthly bent i.e)
If it wasn't there the neck would self bend and become an unplayable banana neck. Twist sideways or whatever needed to ruin playability. Like what would happen with you if you didn't have a skeleton from waist up... if we assume for a moment that that's your neck. huh.gif

At the head (usually, sometimes where the neck meets the body), where the neck becomes head, there's a cover that can be removed (or a hole with a screw inside)
That's the place where you adjust the truss rod, with a screw driver or an allen key. I should say, that's where you adjust the truss rod IF YOU KNOW WHAT YOU'RE DOING biggrin.gif

Truss rods react differently to adjustment, some will be turned a full 360 with only slight result. Some will tighten and bend the neck if you just look at it too intense unsure.gif
So be careful if you get a few beers too many and a screwdriver one night and happen to decide to make grand achivements with your instrument.

This post has been edited by MickeM: Oct 9 2007, 11:29 PM


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mattacuk
post Oct 10 2007, 01:02 AM
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Thats a really good explaination - thanks!! biggrin.gif


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fkalich
post Oct 10 2007, 02:34 AM
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QUOTE (Andrew Cockburn @ Oct 9 2007, 04:16 PM) *
Stop!

Tightening the truss rod isn't specifically for lowering the action, it affects the curvature of the neck - it should be set so it is straight, then you need to work with the bridge.


not exactly. by spec there is a little bow, very slight, for reasons I won't go into. If you set it exactly straight, you may get some buzz on open strings and the first few frets. that being said, some set it pretty straight anyway, less than manufacturer's spec. The spec bow is slight, clearance in the middle of about the diameter of the high E string (.01 of an inch) when you depress the string at the 1st fret and the fret where you meet the body.

You have to be careful, as the rod might be maxed out in tightening. Like any screw, if you tighten it all the way and keep forcing it, it will snap. This can even happen in a new or nearly new guitar, if the manufacturer screwed up and did not allow enough room for adjustment.
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