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All parts truss rod?

 
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tnt



Joined: 14 May 2007
Posts: 2897
Location: Princeton, NJ

PostPosted: Mon Oct 30, 2017 9:23 am    Post subject: All parts truss rod? Reply with quote

So I'm using this:

https://www.allparts.com/LT-1422-000-Double-Action-Truss-Rod_p_2150.html

(They now come with a nice shrink warp over everything to keep glue out of the moving parts.)

The only issue I have is the top of the adjusting nut sits just about 3/32" higher than the top of the rod. Which requires me to rout a channel out of the finger board (I'm installing this for headstock adjustment.)

I used one on the last bass I built and had this same issue - it seems to work, fine, but it seems odd....

Anyone have experience with these?
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rickrob



Joined: 19 Oct 2011
Posts: 1083
Location: Massachusetts

PostPosted: Tue Oct 31, 2017 9:11 am    Post subject: Reply with quote

I used a similar type of truss rod (not allparts, but the same design), and routed the channels using this drawing. You route a little deeper into the neck and slightly wider for the adjusting nut.

These were the measurements from the docs for the rod I used.

1/4" wide slot
3/8" depth (approximate, actual is .369" allow for adjusting)
Cut for nut area is 1.75" long by .425" (about 7/16" total top to bottom)
Wrapped two way adjustable rod


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tnt



Joined: 14 May 2007
Posts: 2897
Location: Princeton, NJ

PostPosted: Wed Nov 01, 2017 1:35 pm    Post subject: Reply with quote

rickrob wrote:
I used a similar type of truss rod (not allparts, but the same design), and routed the channels using this drawing. You route a little deeper into the neck and slightly wider for the adjusting nut.

These were the measurements from the docs for the rod I used.

1/4" wide slot
3/8" depth (approximate, actual is .369" allow for adjusting)
Cut for nut area is 1.75" long by .425" (about 7/16" total top to bottom)
Wrapped two way adjustable rod



Thanks....so it looks like I'm putting it in upside down....huh.

I have the flat bar side facing down....

That would explain it!
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tnt



Joined: 14 May 2007
Posts: 2897
Location: Princeton, NJ

PostPosted: Sun Nov 05, 2017 6:12 am    Post subject: Reply with quote

You think there is any long term problem with this bar being installed upside down?
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rickrob



Joined: 19 Oct 2011
Posts: 1083
Location: Massachusetts

PostPosted: Sun Nov 05, 2017 10:28 am    Post subject: Reply with quote

It's a double action rod, so the adjustments are done in the opposite direction now and there will be a little less surface contacting the fingerboard, since the
round rod is on top. Might have to turn the nut a bit more than normal to get the adjustment. My guess is it'll be OK.
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