Edge Hone: The edge hone is by far the most commonly used edge preparation. Many inserts are automatically provided with an edge hone at the time of purchase, especially larger inserts that will be exposed to heavy cutting. An edge hone on a ground or precision insert must usually be specially requested. It is standard practice of all manufacturers to hone inserts that are to be coated before the inserts are subjected to the coating process. The reason for this is that during the coating process, the coating material tends to build up on sharp edges. Therefore, it is necessary to hone those edges to prevent build-up. "L" Land: The "L" land edge preparation adds strength to the cutting edge of an insert. Essentially, the "L" land amplifies the advantages of negative rake by diverting a greater amount of cutting force into the body of the insert. An "L" land is normally used only on negative, flat top inserts placed at a negative rake angle. T...
