Sandvik CoroMill Face Mills & End are the first cutter to give a true 90 cut without sharp edges or steps; this allows cusp heights of 0.03mm, showing no discernible cusp on a smooth surface. This is possible because of the plus/minus 10-20' angular accuracy, compared with plus/minus30' with less advanced technology. CoroMill 490 is available for diameters of 25 - 80mm, with arbor, cylindrical and weldon shanks; with L and M pitch and in metric and inch. The complete CoroMill 490 range will cover 25 - 125mm. CoroMill 490 is available in P-geometries and later in M and K. Roughness applications L, M and H are available. The radius is 0.4 - 1.6mm