Patent ID: 9744597
Date: 2017-08-29
CPC Classifications: B23B,B23C,Y10T

Claim:
1. A cutting tool insert, comprising a body having a first side surface, a second side surface extending in parallel with and being substantially identical to the first side surface, and four mutually substantially identical lateral surfaces extending between the first and second side surfaces; eight separate cutting edges, the separate cutting edges being identical and each separate cutting edge including a first cutting edge portion and a second cutting edge portion interconnected together by a corner edge, wherein the first cutting edge portion extends along a rim portion at an intersection between one of the first and second side surfaces and one of the lateral surfaces and the second cutting edge portion extends along a rim portion at an intersection between two of the lateral surfaces along a direction from the corner edge towards an imaginary middle plane extending between and in parallel with the first and second side surfaces; a plurality of corner points, a corner point being at each of the corner edges as seen in a side view along a center axis of the insert extending perpendicularly to the first and second side surfaces, four of the corner points being symmetrically arranged at each of the first side surface and the second side surface with equal diagonal distances between the corner points; a corner angle (α) between the first cutting edge portion and the second cutting edge portion is within a range of 75 to <90 degrees, wherein the first cutting edge portion and the second cutting edge portion have substantially the same length to provide a substantially equal cutting depth along each of two orthogonal cutting directions; and as seen along the center axis, a first angle (β) within a range of 14+/−9 degrees formed between a first imaginary line extending from the center axis to one of the corner points at the first side surface and a second imaginary line extending from the center axis to an adjacent corner point of the corner points at the second side surface.