Patent ID: 8727673

Claim:
A metal cutting insert for use in chipforming and material removal from a workpiece, the metal cutting insert comprising: a metal cutting insert body including a cutting edge having at least one discrete cutting location; the metal cutting insert body further containing a distinct interior coolant passage communicating with the discrete cutting location; the distinct interior coolant passage having a coolant passage inlet defining a coolant passage inlet cross-sectional area, a coolant passage discharge defining a coolant passage discharge cross-sectional area, and an axial coolant passage length; the distinct interior coolant passage defining a coolant flow cross-sectional area along the axial coolant passage length thereof; and a plurality of surface features located between the cutting edge and the coolant passage discharge for enhancing coolant flow to the cutting edge wherein the plurality of the surface features are in the form of tear-drop shaped grooves having a varying width and depth in a radial direction, and wherein the varying width and depth of the groove is a maximum at an intersection of a substantially planar facet surface and a first transition surface of the cutting insert.