Hand Tools

Subject:
Reference to Sir Wm’s photo

Wiley Horne
Barry,

A key thing to know is that the cap iron (chipbreaker) must be undercut. This happens when you are sharpening/flattening the edge. As shown in Mr. Duffield’s photo, the cap iron is positioned on the stone in a way which will undercut the edge. Thus, the cap iron will meet the iron, not flush, but on a knife edge. The undercutting of the knife edge allows for some flexing of the cap iron when it is tightened.

Wiley

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