Patent ID: 8956091
Filing Date: 2015-02-17
Classification: B23B,Y10T

Abstract:
1. A drilling tool comprising: a tool main body; a shank extending along a longitudinal axis located at a tip side of the tool main body; and a connection body located at a tip side of the shank, wherein the shank and the connection body are connected via screw portions of the shank and the connection body, wherein a guide part for aligning centers of the shank and the connection body along the longitudinal axis is formed in the vicinity of the screw portions of the shank and the connection body, wherein the guide part includes a tubular portion formed in front of a female screw portion of the shank and a base shaft portion formed at a base of a male screw portion of the connection body, and wherein a distal-most end face of the shank facing the connection body is formed as an inclined plane that is inclined with respect to the longitudinal axis and forms an inclined gap between the distal-most end face of the shank and an end face of the connection body, the inclined gap being wider on one side of the longitudinal axis than on an opposite side of the longitudinal axis by the distal-most end face of the shank being formed as the inclined plane, the inclined gap extends radially outward from the guide part to the outermost surface of the shank and the connection body to discharge cuttings during rotation of the shank and the connection body.