Hard sintered body cutting tool

A hard sintered body cutting tool comprising:

• a first sintered body layer containing at least 80 percent by volume and less than 98 percent by volume of diamond with a remainder being a first binder containing a metal of group VIII of the periodic table and containing at least one material selected from a group of carbides, nitrides and borides of transition metals belonging to the groups IVb, Vb and VIb of the periodic table and solid solutions and mixtures thereof;
• and
• a second sintered body layer containing at least 30 percent by volume and less than 75 percent by volume of cubic boron nitride with a remainder being a second binder containing at least 5 percent by weight and less than 40 percent by weight of Al and at least one Ti compound being selected from a group of TiC, TiN, TiCN, (Ti, any of transition metals, excluding Ti, belonging to the groups IVb, Vb and VIb of the periodic table)C, (Ti, any of transition metals, excluding Ti, belonging to the groups IVb, Vb and VIb of the periodic table)N and (Ti, any of transition metals, excluding Ti, belonging to the groups IVb, Vb and VIb of the periodic table)CN,
• said first and second sintered body layers defining an edge portion, a major surface of said first sintered body layer forming a rake face, said second sintered body layer forming a flank,
• said first sintered body layer being at least 0.02 mm and less than 0.1 mm in thickness,
• said first sintered body layer being in a thickness ratio of at least 1:5 to said second sintered body layer.