| 主权项 |
1. A double-sided cutting insert, comprising
two identical opposing end surfaces, each end surface having four corners; a peripheral side surface extending between the opposing end surfaces, the peripheral side surface comprising two opposing identical major side surfaces; four spaced apart major cutting edges, each major cutting edge being formed at an intersection of each major side surface with each end surface; and a hole extending through the insert from one of the major side surfaces to the other of the major side surfaces, wherein each end surface comprising major rake surfaces adjacent the major cutting edges that form first angles with planes of the major side surfaces, and a central support surface forming a second angle with the planes of the major side surfaces, and each end surface comprises major intermediate surfaces between the major rake surfaces and the central support surface, the major intermediate surfaces forming third angles with the planes of the major side surfaces that are greater than the first angles and smaller than the second angles when measured in a central plane that extends along a central axis of the hole and is generally perpendicular to the planes of the major side surfaces and planes of the central support surfaces. |
