Working with the radius on fingerboards by hand is very tire-some and time-consuming process. And it’s usually in those moments that you wish to have a better way of working.
In this case I wanted a tool that could support any radius sizes but also that you can do compound radius. I figured that I’m probably not the first person with these thoughts so after strolling the web for solutions and inspiration I found some interesting examples to elaborate from. So, a month ago I finished the jig and did a blog post(only in Swedish) about the work.
And here’s my version and plan of the Fingerboard radius jig.
This model supports settings for both 1 and 2-radius fingerboards (Compound radius Fingerboards). In this model you can get 7.25″ up to approximately 18″. If you want values above, you’ve to add 15-25 cm to the height of the frames. One other thing that isn’t present in the plans is that I’ve mounted 2 small springs between the outer frame to inner frame. You can see parts of them in the last picture of the finished jig by clicking on it. The reason for this feature is to protect the frame to not fall down sideways and at the same time make jig more stable.
Download PDF file: Fingerboard Radius Jig Plan
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Michael Käppi is an amateur luthier at his spare time. On this blog, he expresses his love for guitars and desire to build them. Here you can follow ongoing projects as they progress, find tips & tricks, as browse the details on previous work etc. Stay tuned for more...