"Rickenbacker 4620 Bass"

Discussion in 'Luthier's Corner' started by Robert Canfield, Feb 26, 2015.


  1. Gilmourisgod

    Gilmourisgod

    Jun 23, 2014
    Cape Cod MA
    The problem I always have with trying to make deep cuts with a tablesaw is blade flex. The blade bends a little in the cut, at least with thin kerf blades, which is what I use in my underpowered 1.5hp saw.
     
  2. Jon Clegg

    Jon Clegg Supporting Member

    Feb 9, 2015
    Northern Virginia
    This guy uses a jointer, but the principle could apply to a hand plane, belt sander, etc:
     
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  3. Gilmourisgod

    Gilmourisgod

    Jun 23, 2014
    Cape Cod MA
    That's the techique I was clumsily describing, though I think it's a lot safer with a bench sander.
     
  4. IMG_20150421_123929149.jpg
    This is after 2 passes over the jointer Jon. I made a huge mistake by only leaving about an extra inch at the bridge end. I'm losing that with every pass. I'm going to try building a 12 degree sanding jig. It will take longer (will aggravate my torn rotator cuff) but should be less destructive to the length of the neck.
     
  5. Jon Clegg

    Jon Clegg Supporting Member

    Feb 9, 2015
    Northern Virginia
    Yikes! Yeah, I'd say that sanding would be the way to go here, much more controllable.
     
  6. Gilmourisgod

    Gilmourisgod

    Jun 23, 2014
    Cape Cod MA
    Yeah, unfortunately that's what I expected to see happen to the knife edge with a jointer. I'll have to try that on mine, which is set up pretty good right now, but I bet the same thing would happen. You'd have to have at least a couple inches of slop to cut off the damaged part later, and it multiplies quick as a function of the bevel. Sorry you are dealing with this, but at least it might save somebody else (me!) the same hassle later on. Do you have any extra length in the neck blank at the bridge end? Maybe you can still move the nut line downward to get more headstock length back?
    (edit, sorry, you said you have no extra bridge end length. S***!
     
    Last edited: Apr 21, 2015
  7. I have about an inch extra at the bridge end and about a 1/2 inch that I can move the bridge back and still have a nice round over. If all else fails, this is a 32", it could be a 30" scale if necessity dictates. I was going to make two 32"s and one 30" scale. I'm not freaking out just yet. :) Providence has this one right?
     
  8. PDX Rich

    PDX Rich

    Dec 19, 2014
    Portland, OR
    The jointer is certainly tempting, but it seems the guy in the video still needed to go back with a hand plane. A jointer should make additional planing unnecessary, right? Also, I am too afraid of tear-out to try the jointer (we had a similar conversation in my build thread).
     
  9. Hopkins

    Hopkins Supporting Member Commercial User

    Nov 17, 2010
    Houston Tx
    Owner/Builder @Hopkins Guitars
    Why not just build a router jig? Its easy and will leave you with a ready to glue joint
     
  10. This sanding jig I'm about to build could double as a routing jig. ???
     
  11. Hopkins

    Hopkins Supporting Member Commercial User

    Nov 17, 2010
    Houston Tx
    Owner/Builder @Hopkins Guitars
    Sounds like a plan
     
  12. What type of bit would you use?
     
  13. Hopkins

    Hopkins Supporting Member Commercial User

    Nov 17, 2010
    Houston Tx
    Owner/Builder @Hopkins Guitars
    I use a 9/16" Freud pattern bit, but a half inch straight cut bit would work just as well.
     
  14. OK! So, getting back to the BASS! First, I had to replace a leaking skylight in my workshop.
    IMG_20150422_090611533_HDR.jpg

    Second, I had to build a work table.
    IMG_20150422_090554917.jpg IMG_20150422_104949499.jpg

    Third, I had to build another jig to fix the scarf joint. As soon as the Gorilla Glue dries I will test the router on the jig.
    IMG_20150422_104923659.jpg
     
  15. Scarf test looking good!
    IMG_20150422_125634633.jpg IMG_20150422_125705780.jpg IMG_20150422_125627107.jpg
     
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  16. Rough cut body side laminates, walnut/maple/walnut
    Rough cut.jpg
     
    lbridenstine likes this.
  17. Gilmourisgod

    Gilmourisgod

    Jun 23, 2014
    Cape Cod MA
    That's exactly like the jig I made to route the top of my no-scarf headstock, though of course I screwed it up slightly first try as one side was ever so slightly higher than the other. His solution of making one side and them using it to template route the other is so obvious it never would have occurred to me!
     
  18. Scarf finally lined up and glued.
    IMG_20150424_125929383.jpg IMG_20150424_154456546.jpg
     
    ctmullins likes this.
  19. On a side note,... I also bought a G&L neck. The maple fret board only had lefties, so...
    IMG_20150424_171701232.jpg IMG_20150424_174610644.jpg
     
  20. Gilmourisgod

    Gilmourisgod

    Jun 23, 2014
    Cape Cod MA
    Nice job on the headstock, and congrats getting the scarf joint together. Those G&L necks look pretty good.
     
  21. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
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