Patent ID: 6146061
Filing Date: 2000-11-14
Classification: B23B,Y10T

Abstract:
A cutting insert for chipforming metal machining, comprising a top surface having a cutting edge, a bottom surface, and a peripheral surface extending from the top surface to the bottom surface, the bottom surface having at least one groove formed therein defining a longitudinal axis, the longitudinal axis intersecting the cutting edge as the insert is viewed in top plan, the insert further including a hole passing through the insert and through the groove to divide the groove into spaced longitudinally apart groove segments, the groove having a width dimension extending in a direction perpendicularly of the longitudinal axis of the groove, a maximum groove width being substantially shorter than a smallest diameter of the through-hole, the bottom surface further including four recesses arranged symmetrically with respect to the hole, the recesses arranged in pairs such that the recesses of each pair are disposed on opposite sides of a respective groove segment and spaced therefrom, each recess being spaced from all other recesses and defined by a side flank surface and a transverse supporting surface, the side flank surface extending parallel to the longitudinal axis and facing away from the respective groove segment, each transverse supporting surface extending perpendicular to the longitudinal axis, all of the side flank surfaces and all of the transverse supporting surfaces being spaced from the center hole.