Coated Carbide Turning Grade for Cast Iron Roughing

ISO classified as a K20 grade, the AC420K is designed to perform exceptionally well in cast iron roughing applications involving medium to heavy interruptions.

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ISO classified as a K20 grade, the AC420K is designed to perform exceptionally well in cast iron roughing applications involving medium to heavy interruptions. The AC420K is a black Sumitomo Super FF (fine and flat) CVD coated grade. Its ultra-thick coating layers of TiCN for wear and chipping resistance and Al2O3 layers for excellent wear and heat resistance drastically improve conventional cast iron grade tool life. 

Along with the AC420K, the comopany added the EGZ chipbreaker to its product lineup. The EGZ is a groove-style chipbreaker that is especially useful for medium- to light-roughing depth of cut (0.070” to 0.200”) applications with a feed rate range of 0.004-0.020 ipr.