Cutting inserts for use in milling tools

A cutting insert for installation on a rotatable cutting tool holder, the cutting insert comprising:

• a front face;
• a rear face;
• a plurality of side faces, wherein each side face extends between the front face and the rear face and comprises a side seating surface;
• a cutting edge comprising a straight angled lead cutting edge at an intersection of the front face and a side lead surface of each side face;
• and
• a rear corner foot extending from the side lead surface defining a rear corner intersection line with the side lead surface, wherein the side seating surface comprises:
• a second forward seating surface boundary intersecting the side lead surface;
• a rear seating surface boundary intersecting the rear face;
• and
• a rear corner foot seating surface boundary intersecting the rear corner foot.

A cutting tool assembly comprising:

• a rotatable cutting tool holder having a longitudinal rotation axis and comprising a plurality of cutting insert pockets;
• and
• a plurality of cutting inserts insertable into the cutting insert pockets, each cutting insert comprising:
• a front face;
• a rear face;
• a plurality of side faces, wherein each side face extends between the front face and the rear face and comprises a side seating surface;
• a cutting edge at an intersection of the front face and each side face, wherein each cutting edge comprises:
• a facet cutting edge, and a straight angled lead cutting edge extending from the facet cutting edge at a lead cutting edge angle with respect to the facet cutting edge of from 5° to 40°,
• and wherein each side face further comprises:
• a side lead surface intersecting the straight angled lead cutting edge;
• and
• a rear corner foot extending from the side lead surface defining a rear corner intersection line with the side lead surface, wherein the side seating surface comprises:
• a forward seating surface boundary intersecting the side lead surface;
• a rear seating surface boundary intersecting the rear face;
• and
• a rear corner foot seating surface boundary intersecting the rear corner foot.

A cutting insert comprising:

• a front face;
• a rear face;
• a plurality of side faces, wherein each side face extends between the front face and the rear face;
• and
• a cutting edge at an intersection of the front face and each side face, wherein each cutting edge comprises:
• a facet cutting edge;
• and
• a straight angled lead cutting edge extending from the facet cutting edge at a lead cutting edge angle with respect to the facet cutting edge of from 5° to 40°, wherein the cutting insert further comprises a clearance edge extending from the facet cutting edge at a clearance edge angle of from 0.2° to 5.0° with respect to the facet cutting edge.

A cutting insert comprising:

• a front face;
• a rear face;
• a plurality of side faces, wherein each side face extends between the front face and the rear face;
• and
• a cutting edge at an intersection of the front face and each side face, wherein each cutting edge comprises:
• a facet cutting edge;
• and
• a straight angled lead cutting edge extending from the facet cutting edge at a lead cutting edge angle with respect to the facet cutting edge of from 5° to 40°, wherein each side face comprises a side lead surface intersecting the straight angled lead cutting edge at a side lead surface angle measured from the front face of from less than 90° to 60°.