Re Routing A Truss Rod Channe

Discussion in 'Restoration & Repair' started by lucifer, Jul 7, 2018.

  1. lucifer

    lucifer New Member

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    Hi there what's the best way to mill a truss rod channel for a hot rod two-way double action truss rod on AN ALREADY BUILT GUITAR
    in fact a neck through guitar
    is there a fixture for that?

    i am filling the existing truss rod channel right now with a block of wood; i am going to press fit it into the old pocket then i wanna re-rout a pocket for the hot rod truss rod but not sure how to make a fixture so i'll be on a straight line the whole time
    does anybody have an idea?
     
  2. Michael_P

    Michael_P Member

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    1: I hope you plan on gluing that strip of wood in
    2: the Hot Rod truss rod has some issues with thinner necks...e.g. there are better alternatives that have a lower profile and have the 2 way adjustment

    best I can think of for a "fixture" is a template and to use a collar on your router (as opposed to trying to use a pattern bit (top bearing flush cut) which might be problematic in regards to diameter of the cutter)...I would make said template out of at least 3/8" plywood and make sure there is enough material left to the sides of the slot to prevent any bowing out from pressure when using the router and pushing against it.
     
  3. GuitarBuilder

    GuitarBuilder Member

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    A very challenging project! You'd need a fixture to hold the guitar such that the channel is parallel to your workbench surface. The you'd need another fixture to guide the router at the correct angle.
     
  4. lucifer

    lucifer New Member

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    i did use glue( titebond original). and i made this template out of AL just as a back up to help me stay straight
    [​IMG]


    it's a jackson KV2 btw so you're right a really thin neck
    but what's wrong with hot rod truss rods??
     
  5. lucifer

    lucifer New Member

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    or would it be better to do this on a router TABLE with the bit cutting from bottom?
    not that i have the router table i'd have to pay someone to do it for me
     
  6. surveyor

    surveyor New Member

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    Do the arithmetic first. Measure the thickness at the 1st fret from the bottom of the existing channel to the bottom of the neck. Figure what it will be when you re-channel the slot and if you don't have at least 1/8", don't do it. You don't need to ask why I know...
     
  7. lucifer

    lucifer New Member

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    no you're right but what about the hot rod truss rod
    and what about doing it on the router table ? with my socks on??? ha ha
     
  8. surveyor

    surveyor New Member

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    It may not be appropriate to mention this, but the exact same thread is being discussed at length on OLF at this time and could be very helpful for your situation.
     
  9. lucifer

    lucifer New Member

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    what's OLF?
     
  10. Michael_P

    Michael_P Member

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    it's another luthier's forum...

    I think your template looks good, and since you took the time to make it out of aluminum it's more than good and better than using plywood, though certainly more costly and problematic to do fine tune adjustments to.

    at this juncture I would make a copy of the fretboard/neck taper on a piece of wood and make a practice run before you try it on the real thing.

    my query about gluing in the filler was based upon your wording about "press fit"...sure, you would assume that a person would use glue, but...ASS-U-ME

    as far as the hot rod truss rod, many have reported blowing out the back of the neck and considering your working on a KV2 with a speed profile I'd stay a country mile away from the thing.

    as noted, verify whatever truss rod you plan to use leaves a decent amount of meat left over...1/8" can resist a decent amount of force before failing...1/16" is far weaker and asking for trouble
     

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