I sharpen all of my bench planes with some degree of camber, or curve, to the cutting edge. Doing so eliminates plane tracks when the planes are used to dress the wide faces of a board, and makes squaring an edge easier than it is with a straight iron. There are multiple ways to achieve putting a camber on the edge of a plane iron. In this video, I demonstrate using a high speed grinder to camber the cutting edge of a jack plane blade (I’ll discuss another method in a separate video). I also discuss how much camber I use on this blade, and how I go about marking the camber on the blade before grinding. The method I use for marking the amount of camber works for any iron width or bed angle, even if you don’t know what the bed angle is (like for an old wooden plane), because there’s no math involved.