DIAMOND BLADE

PROBLEM TO BE SOLVED: To provide a blade diamond blade by which a cutting quality at the beginning of cut-off is made good, and which is excellent in durability at cutting. SOLUTION: The diamond blade 1 is mainly comprised of a plurality of slits 3 in which a substantially disc-like shape is presented and formed into a hook hole shape by a combination of a straight line and a round shape at a predetermined interval on the outer periphery, a rotary shaft hole 4 provided in a rotary shaft center, a steel-made substrate 6 having a rotary locking hole 5 for transmitting a rotary drive stably by being provided close to the rotary shaft hole 4, and a tip 2 presenting a flat plate shape installed between the slits 3, respectively, along the outer peripheral direction of the substrate 6. And the tip 2 is; having a tip face 7a having the groove in which three cut grooves 9 toward the direction of the rotary shaft hole 4 from the tip outer end are provided by being cut, and a tip 7b not having a cut groove 9; that the tip face 7a having a groove is installed by being jointed to the substrate 6 so that it is made to appear on the substrate surface 10 and the substrate rear face of the substrate 6 alternately. COPYRIGHT: (C)2004,JPO&NCIPI