george wilson
09-15-2010, 10:07 PM
Someone was asking how I made the scratch stock to deepen the edge rabbet on guitar bodys in the waist.
Somehow the ball bearing router bits always cut shallower in the waist of a guitar body. I made this QUICK AND DIRTY scratch stock from a scrap of violet wood and a piece of saw blade steel. The pot metal thumb screw was carefully selected:).
Just a bandsaw cut to hold the blade. The scratch stock is beveled in its lower part to provide nearly a line contact with the side of the guitar. Rounded just enough to not scratch the guitar. It is pulled DOWN HILL from both directions to not ruffle the spruce top (or back),and does a perfect job of making the rabbet there deep as elsewhere.
We used things like this a lot in the Musical Instrument Maker's Shop when we were cutting binding in completely by hand.
Somehow the ball bearing router bits always cut shallower in the waist of a guitar body. I made this QUICK AND DIRTY scratch stock from a scrap of violet wood and a piece of saw blade steel. The pot metal thumb screw was carefully selected:).
Just a bandsaw cut to hold the blade. The scratch stock is beveled in its lower part to provide nearly a line contact with the side of the guitar. Rounded just enough to not scratch the guitar. It is pulled DOWN HILL from both directions to not ruffle the spruce top (or back),and does a perfect job of making the rabbet there deep as elsewhere.
We used things like this a lot in the Musical Instrument Maker's Shop when we were cutting binding in completely by hand.