Patent ID: 6579042
Filing Date: 2003-06-17
Classification: B23B,B23C,Y10T

Abstract:
A cutting assembly comprising:a tool holder having an insert seat, the insert seat including a seat surface into which a screw-threaded mounting hole extends in a direction obliquely to the seat surface; a cutting insert mounted in the seat, the insert having a front surface and a rear supporting surface oriented parallel to the seat surface, the insert having a through-hole defining a center axis and including a front cavity disposed at the front surface of the insert, the front cavity defined by a wall, at least a screw-supporting portion of the wall having a circular cross section which tapers toward the rear supporting surface; and a fastening screw extending through the through-hole, the screw including a threaded shank, and an enlarged head disposed in the cavity, the head including an outer face configured as part of a sphere which makes 360 degree contact with the screw-supporting portion of the cavity wall, the threaded shank threadedly mounted in the mounting hole, the head and shank being shaped symmetrically about the center axis of the screw, a maximum cross section of the head being larger than a minimum cross section of the through-hole, the center axis of the screw forming an acute angle with the center axis of the through-hole.