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4 string bass project
I want to build a standard tuned four string electric bass for art. This is my first cigar box instrument and despite the many hours of research I was still left with a few questions. I know I need a truss rod or something to act as one, but I don't…
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Will, I've used two methods. 1 - The eyebolt in a vise (threads protected with leather from the jaws on each side, threads extending 1/2" above the jaws, and a small fine tooth hacksaw to make the slot. the slot can be made wider with a narrow file if needed. Jam nut may not be able to be left on the bolt to clean up the threads, depending on your jaw depth (It can prevent the jaws from closing on the threaded section of the bolt, if so, a 1/4-20 die is used to clean threads if necessary). 2 - At my Northern shop, I have a mini table saw with a 4" carbide blade that I use to cut the slot with the jam nut on the bolt. The blade is like an abrasive disk, so I can widen the slot if needed.
Will, forgot to say, I always use stainless steel eyebolts for strength and that "chromed" look.
Will, I use an electric hand drill for the 1/4" hole through the headstock, here is a front and back view on a bedpan 1 string eyebolt tuner. First the front...
Will, when I use I-bolts: 1/4-20 X 1 1/2", jam nut threaded on bolt to eye, cut slot into end of bolt to accept string (hacksawed and filed), back nut off and on bolt to clean threads, 1/4" hole in headstock for tuner(s), T-nut (enlarge 1/4" headstock hole to 5/16" to accept t-nut threaded section) on eye side of headstock, return jam nut to eye, screw bolt into t-nut and through headstock to desired height, snug jam nut down onto t-nut, tune the string, lock down jam nut to lock tuner if desired, ease off to re-tune. Use as many as you make room for on the headstock, and play on! I'll post a front and back close-up photos in a few minutes that should help...