Old wood planes are tools often challenging the century, continuing today to give satisfaction to those who use them. When accidentally a damage occurs, who causes it feels very guilty for having interrupted a century-old life . The only partial relief could be a good repair. The accidental fall of a cast iron plane often results in a lesion at the point of greatest weakness: on the sides, near to the mouth. This happened to my Stanley # 3. After listening to other suggestions, I developed this system to repair this lesion type, which was particularly simple and effective. After appropriately clamping the plane body to avoid unwanted movements we can drill 4 mm holes (slightly larger than electrodes that measure approximately 3.5 mm) along the lesion.
At this point, cast iron is properly heated with a torch or any fire, and the arc welding is carried out. I used a small inverter welder with specific cast iron electrodes. In fact it is easier fill the holes than a concave groove, which instead requires some experience. ( In the pics I forgot to take a shot just after soldering) .
I then proceeded to flatten the sole and sides, which were however almost completely aligned. And here it is returned to its former glory (or almost) and produce the usual thin shavings.