Patent ID: 7740089

Claim:
A drilling tool ( 1 ) for percussion drilling, which comprises a cutting element ( 3 ) that is configured as a plate ( 3 ) or head and that has at least one cutting edge ( 11 ) defined by a cutting face ( 6 ) and a free face ( 10 ), wherein the cutting edge ( 11 ) is associated with a first free face section ( 10 a ) which lies in a cutting plane (CP) and is followed by a second free face section ( 10 b ), wherein the cutting plane (CP) is cut at a right angle to the cutting edge ( 11 ) and wherein the first free face section ( 10 a ) is convex and is limited by a convex bulge ( 13 ) or a convex polygon outline ( 15 ), while the second free face section ( 10 b ) is straight, wherein a rib ( 14 ) is defined by the first free face section ( 10 a ) and an associated first cutting face section ( 6 a ), wherein a vertical height (H) of said rib ( 14 ) ranges from 0.1 mm to 1.0 mm, wherein an extension (V) of the second free face section ( 10 b ) extends in a direction of rotation (d) of the drilling tool ( 1 ) through the cutting element ( 3 ) below the cutting edge ( 11 ), and wherein said extension (V) defines an intersection and dividing line between the first free face section ( 10 a ) and the second free face section ( 10 b ).