Measure and Mark Pivot Point
At 0:42 in
Cutting a prefect circle with a router!
What happens here
On the material you intend to cut, draw the desired circle. Then, using a measuring tape, measure the radius of this circle from its center to its edge (e.g., 6 inches as shown). Transfer this measurement to the newly attached wooden jig plate. Measure from the outermost edge of the router bit itself (not the jig's edge) along the centerline of the wooden jig plate, to the point corresponding to the desired radius. Mark this exact point with a pencil. This mark will be the pivot point for your circle cuts. The video demonstrates finding the center of the wooden jig board (at 1.75 inches for a 3.5-inch wide board) to ensure the pivot point is accurately aligned.
Goal: Identify and mark the precise pivot location on the jig for the desired circle radius
Tools and materials
- Measuring Tape — Measuring the desired radius for the circle cut
- Pencil — Marking the pivot point on the jig plate
- Router Bit — Reference point for measuring the radius on the jig
- Material to be cut — The workpiece on which the circle will be cut
- Plywood Jig Plate — The custom wooden jig plate on which the pivot point is marked
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