Sumitomo Electric Hardmetal High-performance milling grades expanded
UK – Five different grades of RDMT button-style indexable milling inserts for carbon, alloy, stainless steels and cast iron have been added to the high-performance milling portfolio of Sumitomo Electric Hardmetal.
The new inserts offer high wear resistance and high resistance to insert fracturing, Sumitomo explained.
Available in sizes of 8, 10, 12 and 16 mm inscribed circle, the five grades are physical vapour deposition-coated (PVD) for the ACP100, 200 and 300 inserts, and chemical vapour deposition-coated (CVD) for the ACK200 and 300 inserts.
The ACP100 grades for cutting steel and ACK200 grades for cast iron incorporate Sumitomo’s Super FF ultra-hard coating that employs a tough carbide substrate with an ultra-fine TiCN crystal structure. It has an ultra-smooth alumina on the surface and faces of the insert. According to the company, this amalgamation of coating combinations enable up to 1.5 times more efficiency in machining and provide more than a doubling of tool life over conventional grades under normal cutting conditions. The coated surface also has good chipping resistance and improved adhesion strengths.
The ACP200 and 300 grades for milling steel and ACK300 for cast iron employs Sumitomo’s Super ZX multi-layer nano technology coating that combines alternating, 10-nanometre-thin layers of TiAN and AlCrN. Like Super FF, Super ZX delivers similar tool life efficiency and its coated surface also offers the same characteristics as the Super FF.