Polycrystalline cubic boron nitride (PCBN) is a material which is sintered at extremely high pressure and high temperature into a wear-resistant material with properties close to those of diamond. Due to the hot hardness, oxidation resistance and fracture toughness of the material, inserts made of PCBN have excellent edge strength and long tool life when machining hard ferrous materials and pearlitic gray cast iron.

Seco Secomax™ Turning Insert, CNGA Insert, 120408 Insert, Diamond, 5.25 mm Maximum Depth of Cut, 12.7 mm Inscribed Circle, 4.76 mm Thickness, 12 Seat, L1-U Chipbreaker, 0.8 mm Corner Radius, 5.15 mm Hole Dia, Manufacturer's Grade: CBN060K, ANSI Code: CNGA432S-00625-L1-U CBN060K, ISO Code: CNGA120408S-01525-L1-U CBN060K, 80 deg Included Angle, 0 deg Relief Angle, PCBN, TiAlSiN, Material Grade: H, For Use On: Hard Materials