Patent ID: 7740427
Filing Date: 2010-06-22
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, each of the jaws having a stop face and a centering face on the stop face at an acute angle to the stop face, said cutting insert comprising: a plate-shaped cutting element having a first end, a second opposite end, and a bore therethrough for receiving the mounting screw, said first end of said cutting element having a pair of mutually opposing cutting edges, said element having a chip face extending from each said cutting edge to said second end of said element and having a stop face and a centering fin with a centering face located between said chip face and said stop face, said centering face at an acute angle to said stop face, said cutting element centering faces adapted to engage with the centering faces on the jaws of the base body to center said cutting insert in the base body, said cutting element centering faces and the centering faces on the jaws of the base body being the sole means of centering said cutting insert in the base body.