The right cutter, insert, and cutting conditions can boost tool life 30% in this highly aggressive cutting process

Are you having surface finish problems in a finish milling application? Examine the tool's depth of cut (DOC). Many engineers still believe finish passes should remove 0.005-0.010" (0.13-0.25 mm). A better choice in most work materials is a DOC of 0.015-0.025" (0.38-0.64 mm). When the carbide inserts do not have enough materials to bite into, the tool will rub against the work surface instead of cutting, reducing tool life and surface finish quality.

You may also be milling a hard material without realizing it. In turning, you can classify any work material above R^sub c^45 ...