I was given a Stanley No.40 scrub plane in fairly good condition except for the iron. I came up with many ideas to create the radius required but went with a simple solution. The SVD-110 and a fine point sharpie. Takes a little freehand but the resulting radiused cutting was a joy to scrub a rough-cut plank. I was foolish and overlooked this gem of a plane for general handiwork so after flattening the back and establishing the radius point, I carefully drew the centerline of the iron from behind the radius to the bevel edge, then drew from the radius to the corners or the projected corners depending on the previous shaping. Depending on how well you see the layout lines add enough to maintain a perpendicular line to the face of the wheel. With the SVD-110 and the radii, the bevel can be shaped & sharpened and the layout can keep a nice smooth radiused edge as long as the radius is lined up perpendicular. Setup on the honing wheel and polish but keep in mind its purpose as there are no fine adjustments on this plane. I went with about 25 degrees as I'm mostly working with softwoods. I was using mine for an architectural hand-hewn look on wood so my final honing was over-done.
The scrub plane is unique, even with the frog back as far as possible and a slight radius on my No. 4 1/2 smoothing plane it can't get close to the controlled stock removal of the ugly duckling scrub, wish I learned that years ago but no one I knew even liked them.
The scrub plane is unique, even with the frog back as far as possible and a slight radius on my No. 4 1/2 smoothing plane it can't get close to the controlled stock removal of the ugly duckling scrub, wish I learned that years ago but no one I knew even liked them.