Carbide turning inserts, like all other metal cutting tools, are identified with a series of letters and numbers. These refer to the Turning Tool ISO code system that provides a (relatively) simple way to identify carbide inserts.

An insert's material, or grade, is designed to suit a particular machining application, and even though two inserts may look the same, the base material and the coating (if there's one) can be very different.

TNMG insert is the floorboard of indexable turning blades, which is the mainstream of modern metal cutting applications of products that are primarily used in metal cutting milling cutting cutting thread turning areas such as the material can be divided into the coating blade metal ceramic blade ceramic knife TNMG ...