Round cutting insert with anti-rotation feature

A round cutting insert, comprising:

• a plurality of first projections formed on a first surface;
• a first cutting edge disposed circumferentially about the plurality of first projections and a first outer surface that extends generally inwardly from the first cutting edge, wherein the plurality of first projections extend at least partiall onto the first outer surface;
• wherein the plurality of first projections each include a top surface contained in a plane that is recessed with respect to a different plane that contains the first cutting edge;
• a plurality of second projections formed on a second surface that is generally opposed to the first surface;
• a second cutting edge disposed circumferentially about the plurality of second projections and a second outer surface that extends generally inwardly from the second cutting edge, wherein the plurality of the second projections extend at least partially onto the second outer surface;
• and
• wherein the plurality of second projections each include a top surface contained in a plane that is recessed with respect to a different plane that contains the second cutting edge.

An anti-rotation mounting arrangement between a round cutting insert and an insert receiving pocket in a tool body, the round insert including a first portion that terminates in a first cutting edge, and includes a first outer surface that extends generally inwardly from the first cutting edge, a second portion that terminates in a second cutting edge and includes a second outer surface that extends generally inwardly from the second cutting edge, and a circular side surface between the first portion and the second portion, comprising:

• a plurality of first projections extending from the first portion, wherein the plurality of first projections extend at least partially onto the first outer surface;
• wherein the plurality of first projections each include a top surface contained in a lane that is recessed with respect to a different plane that contains the first cutting edge;
• a plurality of second projections extending from the second portion, wherein the plurality of second projections extend at least partially onto the second outer surface;
• wherein the plurality of second projections each include a top surface contained in a plane that is recessed with respect to a different plane that contains the second cutting edge;
• and
• a plurality of dimples formed in the insert receiving pocket for cooperating with and receiving one of the plurality of first projections or the plurality of second projections to prevent rotation of the round cutting insert while mounted in the insert receiving pocket.

A cutting tool assembly, comprising:

• a tool body having an insert receiving pocket;
• an insert that is received in the insert receiving pocket, the insert having a first portion having a first cutting edge generally disposed about an outer periphery of the first portion and a first outer surface that extends generally inwardly from the first cutting edge, and a second portion having a second cutting edge generally disposed about an outer periphery of the second portion and a second outer surface that extends generally inwardly from the second cutting edge, the insert defining a non-cylindrical opening extending axially through said insert from the first portion to the second portion;
• the insert further having a plurality of first projections extending from the first portion wherein the plurality of first projections each include a top surface contained in a plane that is recessed with respect to a different plane that contains the first cutting edge, and wherein the plurality of first projections extend at least partially onto the first outer surface;
• the insert further having a plurality of second projections extending from the second portion wherein the plurality of second projections each include a top surface contained in a plane that is recessed with respect to a different plane that contains the second cutting edge, and wherein the plurality of second projections extend at least partially onto the second outer surface;
• and
• a fastening screw that extends through the non-cylindrical opening to removably secure the insert to the insert receiving pocket of the tool body.