Five different grades of RDMT button-style indexable milling inserts for carbon, alloy and stainless steels as well as cast iron are added to the high performance milling portfolio of Sumitomo Electric Hardmetal.  The new inserts span application advantages where benefits from high wear resistance to high resistance to insert fracturing are required.


Available in sizes of 8, 10, 12 and 16 mm inscribed circle, the five grades cover physical vapour deposition (PVD) coated ACP100, 200 and 300 and chemical vapour deposition (CVD) coated ACK200 and 300.

The ACP100 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.  The ACP200 and 300 grades for milling steel and ACK300 for cast iron employs Sumitomo’s Super ZX multi-layer nano technology coating which combines alternating 10 nanometre thin layers of TiAN and AlCrN.  Like Super FF, Super ZX delivers 1.5 times greater efficiency and double the tool life over conventional grades under normal cutting conditions.  The coated surface also has excellent chipping resistance and improved adhesion strengths.

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