Choosing the right rod length
Installation Techniques for Dual Action Truss Rods
Suggested Truss Rod Guide for neck building.
The following is a list for the recommended truss rod sizes for various musical instrument setups. This list is simply meant as a cross reference and it's not intended to be an engineering or technical selection for individual setups. Truss rods construction and lengths vary greatly from Manufacturer to Manufacturer and builder to builder. Another factor that enters into the equation is the type of wood and skill set of the builder to shape and prep the neck for overall performance.
This list is done as a guide for your assistance. We have received numerous questions over the years on various setups and rods for the application.
In general, we have opt'd to work mainly with two way or dual action type rods. For the most part they fit almost all applications for building but offer the flexibility for two-way adjustment instead of single direction. This allows the builder the most options and adjustment for correction or playability of the guitar, bass, mandolin or other instrument.
Any feedback on this list is great appreciated. We collaborate with many builders to hone in on the best solutions for builders.
Two way or Dual Action Rods
1. Dual Action. This rod is threaded at each end and works be pulling the rod in different directions either toward the center of the rod or away from the center. It allows the top and bottom part of the rod to move away from each other and apply pressure up and down at the same time to adjust the neck
2. Two Way. This rod is welded together on one end and threaded on the other end with a metal cap welded over the threaded nut. This allows the nut to push against either the rod or the end of the cap causing the entire rod to flex in one direction to allow adjustment. The nut is covered completely by the welded cap and turns inside the cap. Do not remove this cap, it is part of the design.
Carbon Fiber Rods:
1. Carbon Fiber. Clearly a very light weight and extremely strong non-adjustable neck reinforcement. This rod can be used in combination with a metal truss rod or one or two additional carbon fiber rods in the neck. It allows for very consistent and very straight necks, however, it does require the build to be very precise and consistent, there is not an adjustment once this is installed unless you add a two way or dual action rod to the build. 1.5 million PSI breakpoint and extremely light weight. This is a great option for bass guitars.
Dual Action Rod Size Chart
Listed below is a suggested length for using dual action two way truss rods. There are many variables in determining the length of the rod.
1. Heel or Headstock location
2, Scale length
3. Wood and wood cut (plain or quartered) or multiple piece.
4. Where you want the rod to land. Remember you can only adjust the part of the neck that will move, heel areas, volutes and other features will prevent neck movement and restrict the rod adjustment.
Limited 90 day parts only warranty:
Our warranty on this item is limited to replacement of the rod itself. We are not responsible for damages incurred in the installation of the rod or as a result of a damaged rod.
Please carefully check the rod for correct action prior to installation. Any cost beyond the replacement of the truss rod itself is not covered under our product warranty on this item.
Please bench test the rod prior to installation.
Please notify us immediately if you have a defective truss rod, we will replace the part under this 90 day warranty from the date of original purchase.