Does anyone know if historically,woodworkers cambered their irons? Or is this a modern adaptation?
The oldest reference I own is the "Planecraft" book originally printed in the 1930's. It has all of about one sentence on the subject:
"If course and rough work is in hand, the blade may be ground as in "D" (illustration D is a cambered edge). But this will result in a series of corrugations which must later be removed for a nice finish."