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Home » Walter MN3 Geometry Offers Fine Finishing Benefits

Walter MN3 Geometry Offers Fine Finishing Benefits

June 28, 2021
Walter is launching the new MN3 geometry specially for the quickly growing potential of ISO N materials, for example aluminum: It is highly positive and can be used on both sides and therefore combines a long tool life and high metal removal rates with greater cost-efficiency. The polished rake face (for improved chip evacuation) and the extremely sharp cutting edge (for a softer cutting action) of the new geometry are particularly important factors for the insert's good performance. The double-sided insert is a useful expansion of the existing Walter portfolio for ISO N machining with the positive geometries FN2 and MN2. Walter is launching the new indexable insert in two grades: As a cost-effective, uncoated and polished grade WN10 and in the grade WNN10, with a wear-resistant HIPIMS PVD coating, extremely smooth surface and optimized layer bonding.

MN3 is the first Walter geometry to have double the number of cutting edges while also being highly positive. The rake angle on the radius is 29 degrees. It can be used both for the medium machining of non-ferrous metals and ISO N alloys (for example aluminum, copper or brass alloys) and for the fine finishing of small components made from steel and stainless-steel materials or high-temperature alloys. Thanks to the highly positive cutting edge and chip nubs, users benefit from improved chip breaking – even when working with "lead-free materials" like CuZn21Si3P. The surface roughness was optimized, which allows for an increased tool life even when working with materials that have a tendency to stick (built-up edges). The negative basic shape with double the number of cutting edges increases productivity and cost-efficiency.
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