Round the edges of every plane blade?

摘要

Q: I've read that the cutting edge of a plane blade should be slightly cambered. Why? And should I do It to all of my plane blades? A: No, you xhouldn't camber all of your blades. Some need to be straight to perform their jobs. The blade of a shoulder plane or rabbet plane should definitely be left square, because you can't trim a tenon shoulder square or cut a square rabbet with a rounded blade. And 1 keep the blades square on all of my bench planes, except for my smoother. But I do round their corners slightly so that they don't cut tiny steps into the surface. A straight edge is also easier to maintain, which is an important consideration if you use your bench planes a lot.