Ramping insert and high-feed milling tool assembly

A ramping insert comprising:

• opposing first and second rake surfaces;
• an insert peripheral surface connecting the first and second rake surfaces;
• an insert screw hole opening out to opposing sides of the insert peripheral surface, the insert screw hole having an insert screw hole axis;
• and first and second cutting edges extending along an intersection of the insert peripheral surface and a corresponding one of the first and second rake surfaces;
• each of the first and second cutting edges comprising:
• a first ramping sub-edge;
• a first side sub-edge;
• a first feed sub-edge connected to the first ramping sub-edge and the first side sub-edge;
• a second ramping sub-edge connected to the first side sub-edge;
• a second side sub-edge connected to the first ramping sub-edge;
• and a second feed sub-edge connected to the second ramping sub-edge and the second side sub-edge;
• wherein:
• each of the ramping and feed sub-edges is longer than each of the side sub-edges;
• a maximum rake surface length of each rake surface is measurable between the first and second side sub-edges thereof, and each of the ramping and feed sub-edges converge with increasing proximity to the side sub-edge to which they are both connected;
• wherein:
• each ramping sub-edge comprises a sharp ramp corner portion, said sharp ramp corner portion being a corner portion of the ramping sub-edge closest to a feed sub-edge;
• each feed sub-edge comprises a sharp feed corner portion adjacent to one of said sharp ramp corner portions;
• and a connection point of the ramping sub-edge to the feed sub-edge is located in the middle of a corner formed by the adjacent corner portions.