I am going to order a truss rod for my guitar project. If you have used a truss rod, what length did you use?

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Have you tried searching the site for info? The Search box is located at the top right of the page? 

If you want adequate answers, then you’ll have to include some more info? Scale length, number of strings, wood type, Etc. Otherwise, it’s a shot in the dark & you’ll get conflicting information? 

I will have 4 strings and I have planned to use a scale length somewhere between 600mm and 630mm and at least 19 frets, maybe even 20 frets.

I am looking at ebay and there seems to be some standard lengths for truss rods.

Hi, there are four or five or more different reinforcing methods/materials that can be used in a neck, and advising you what to use is hard, as Brian has mentioned already there are a few factors that would guide your decision.
If I was to tell you what rod I would use it could be misleading without any whys and wherefores. The types…

• Good neck wood, grain orientation, and fingerboard material is a good start. Traditionally classical nylon guitars do not have a truss rod in the neck.
• Depending on the number of strings I have used a simple hardwood bar inserted into a neck
• Simple carbon fiber bars can be used in the same manner.
• Solid metal bar sized to suit the number of strings. In my early 6 stringers, I used ¼” x ½” flat bar.
• Single rod, fixed on one end and a nut on the other. Needs to be fitted into a curve in the neck. Works one way
• Single rod in aluminum U channel. Installed flat. Works one way.
• Two-rod system, one end welded Works one way
• Two-way system, the rod is welded on both ends using a rod and a flat bar combination. Moves neck up or down.

I’ll leave you to decide which end to put the adjusting nut, peghead or heal, and what type of nut you want. I fit my rods in different ways in the neck. But as a guide only… adjusting at the heal end {inside the body] start the rod at around the first fret.

If adjusting at the peghead start your rod about 2” from the heel end. How deep into the neck I suppose it will depend on neck dimensions. But I cover my rod with a timber fillet and then the fingerboard.
Now you have the basics you can plan your own best method.
Good luck Taff

Thank, this is very useful and now I know how to calculate a good length for the rod!

Now I have ordered a 380mm truss rod as I will adjust at the nut.

Hi, that's ok, that's what this site is about, sharing. What style of rod did you settle on?

I have decided to adjust at the nut. I went with a dual action rod.


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