Patent ID: 8784019
Filing Date: 2014-07-22
Classification: B23B,Y10T

Abstract:
1. A drilling tool for chip removing machining, comprising: a basic body, including: a loose top, including: two opposite side contact surfaces; a pair of convex guide surfaces situated axially behind the side contact surfaces, the guide surfaces being concentric with the second center axis and radially spaced-apart from the second center axis at a distance that is less than the radial distance between the second center axis and a respective side contact surface; and a pair of torque-carrying tangential contact surfaces that are situated radially inside the envelope part surfaces and outside the side contact surfaces, wherein the front end of the basic body includes a jaw that is delimited by a bottom axial support surface against which the axial contact surface of the loose top is pressed, and two peripherally situated branches that protrude axially from the bottom axial support surface, the branches being elastically bendable to clamp the loose top in an operative end position in the jaw by a pair of inner support surfaces of the branches being resiliently pressed against the side contact surfaces of the loose top, and a pair of rotationally heading tangential support surfaces of the branches being pressed against the tangential contact surfaces of the loose top, besides which axially behind the inner support surfaces concave guide surfaces are arranged for co-operation with the two convex guide surfaces of the loose top, and the loose top being axially inserted into the jaw of the basic body and turnable to and from an operative end position, in which the tangential support surfaces of the branches are pressed against the tangential contact surfaces of the loose top, and wherein