Patent ID: 8727674

Claim:
A tool holder for clamping a cutting insert comprising a first side, a second side, a third side parallel to the first side and a fourth side parallel to the second side, a first corner at an intersection between the first and second sides, a second corner opposite the fist corner at an intersection between the third and four sides, a third corner at an intersection between the first and fourth sides, a fourth corner opposite the third corner at an intersection between the second and third sides, a top surface, a bottom surface, a first notch formed in the first corner and a second notch formed in the second corner, the first notch including a first forward surface, a first rearward surface and a first root between the first forward surface and the first rearward surface, the second notch including a second forward surface, a second rearward surface and a second root between the second forward surface and the second rearford surface, the first and second roots being intersected by a plane that is perpendicular to a longitudinal axis of the cutting insert that intersects the third and fourth corners, the tool holder comprising: a tool holder body including an insert-receiving pocket formed at a forward end thereof and having a bottom and at least one side wall for receiving the cutting insert; a clamp arranged on the tool holder body, the clamp including a top surface, a forward lower face and a rearward lower face, and an aperture formed therethrough, the clamp including a nose portion with a pair of downward extending nubs; and a clamp screw capable of being inserted through the aperture of the clamp and at least partially received in a clamp-securing bore of the tool holder body to bring the clamp into pressing engagement with the insert, wherein a central axis of the clamp-securing bore is formed at an angle with respect to an axis of the pair of downward extending nubs, and wherein the pair of nubs of the clamp engage the first and second notches in the cutting insert to exert a downward and rearward force on the cutting insert when the clamp is brought into pressing engagement with the insert, thereby securely clamping the cutting insert in the insert-receiving pocket of the tool holder.