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Neck radius of Jazz Bass Special

Discussion in 'Luthier's Corner' started by Benton, Jul 20, 2003.

  1. I have a japanese made fender fretless Jazz Bass Special from about 1988. It has a P body and a Jass neck. I have worn pits and grooves in the fingerboard so it has poor rattling noisy tone especially when notes are in tune.
    I would like to sand them out myself but am aware that I need the right tools. Specicaly a sanding block that matches the neck radius. I do not know what the radious is or how to measure it. Once I have the block I know it will be a matter of sandpaper, patience and elbow grease to get the board level. Any advise and help would be great. Thanks.
  2. Carey


    Jan 18, 2002
    Redlands, CA
    You can get radius gauges from Stew Mac. These will tell you what the radius is and then you can buy the appropriate sanding block. You can also sand the radius without the block, but you have to check your progress regularly with the gauge.
    Also, make sure you take off an even amount when you level the board. It would be best to have a straight edge to check your progress. Set the neck as straight as possible and start sanding, checking it with the radius gauge and the straightedge often.
    Good luck!
  3. You can make your own radious sanding block.

    Make a block out of pine about 4 X 12 inches long and sand the revirse radious into it using your neck with 40 grit sand paper on it so it is the oposit of your neck.
    You can atach the sand paper with DA contact cement.
    One you have that made you can fix the groves in your neck with it.

    Or just buy a radious block from Stew Mack.]

    I think it is fun to do it yourself.