DIAMOND CUTTING MEMBER AND METHOD OF MAKING THE SAME

摘要

A fixing seat (62) having a bearing surface (64) inclining at a predetermined inclination angle E is provided on the fixing reference surface (56) of a shank (54), and under such a posture as the first base (12a) of a diamond material is applied tightly to the bearing surface (64) and the first vertex is projecting forward substantially along the center line of the shank (54), the diamond material is secured integrally and the first vertex part projecting from the fixing reference surface (56) is removed by polishing at a predetermined inclination angleθthus forming the {112} face or the vicinity (nearly±1°or less) thereof as a face (70). Since the first base (12a) of the diamond material (10) is applied tightly to the bearing surface (64), as it is, and bonded integrally by active brazing filler metal, a large bonding area can be secured easily and high bonding strength can be attained easily. Production time and cost can be reduced sharply as compared with a case where the bonding surface is formed by polishing and removing a second vertex on the side opposite to the first vertex) where the face (70) is formed.