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 ARCHIVED TOPIC: Neck truss rod?


Please note this is an archived topic, so it is locked and unable to be replied to. You may, however, start a new topic and refer to this topic with a link: http://www.banjohangout.org/archive/380630

1xsculler - Posted - 01/18/2022:  12:43:15


When I tighten the truss rod in the neck it increases the bow. When I completely loosen it the neck goes “almost” flat. So long as it stays that way I’m not too worried but if it starts to bow it doesn’t appear I can adjust it out???

roydsjr - Posted - 01/18/2022:  16:11:40


If you have a 2 way truss rod, then you can go the other way to adjust it. If it's a one way
(removable nut) then you don't have any adjustment.

1xsculler - Posted - 01/19/2022:  08:47:02


Thanks very much for that info.

Old Hickory - Posted - 01/19/2022:  18:09:03


Something sounds off.



A one-way truss rod only counteracts up-bow (relief). Tightening a one-way rod is supposed to flatten an up-bowed neck. Loosening a one-way rod lets the neck get pulled into up-bow by the strings. But a one-way rod cannot set any amount of up-bow.



A two-way rod, on the other hand, can both flatten a neck and introduce relief. 



If you can "tighten" a nut (clockwise) and see increased bow but can't turn the nut the other way past a neutral position to create flatness and even backbow, then you might need to have a luthier look at this. And you might be looking at an expensive repair.



I am NOT recommending that you turn the nut further than it wants to go. That's the absolute worst thing to do. But something does not sound right.

lightgauge - Posted - 01/20/2022:  03:32:02


Sounds like a two way rod installed upside down. If it works in both directions, it is a two way rod.

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