Patent ID: 7311480
Filing Date: 2007-12-25
Classification: B23B,Y10S,Y10T

Abstract:
1. A drilling tool cutting insert adapted to be clamped in a rotatably driven drilling tool base body, the base body having a mounting groove formed in an end thereof defined by a pair of clamping jaws, each of the jaws having a bore therethrough, one of the bores being threaded, the bores for receiving a mounting screw for clamping said cutting insert in the mounting groove, said cutting insert comprising: a plate-shaped cutting element having a tip, a first end, a second opposite end, and a bore therethrough for receiving the mounting screw, said first end of said cutting element having an approximately S-shaped cutting edge extending across said tip and including a pair of mutually opposed convex cutting edges which extend substantially an entire radial extent of said cutting element, and each said convex cutting edge transitions into a concave outlet edge in a direction from said first end of said cutting element toward said second end of said cutting element, said concave outlet edges facilitating chip removal.