Round-over bits basics
Set up a round-over bit
After mounting a round-over bit in a router, adjust the bit up or down so the bottom of the concave cutting edge aligns flush with the router base or the surface of the router table. Use a flat block of wood, as shown in the drawing, to check your adjustment.
Before cutting your workpiece, test the cut on scrap stock. If the bit extends too far, it will cut a slight ridge into the workpiece surface, called a fillet. If the bit does not extend far enough, it will cut an incomplete radius.
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