High Speed Milling Tool and Tangential Ramping Milling Insert Therefor

A single-sided tangential ramping milling insert (14) for high speed milling comprising:

• opposite insert seating and top surfaces (20, 22);
• a peripheral surface (24) extending between the insert seating and top surfaces (20, 22) and comprising two opposite side surfaces (26);
• a reference plane (P) passing through the entire peripheral surface (24) midway between the seating and top surfaces (20, 22), the reference plane (P) defined by a first axis (X) passing midway between the side surfaces (26), and a second axis (Y) passing through the side surfaces (26) and intersecting the first axis (X);
• a clamping bore (28) which opens out to the insert seating and top surfaces (20, 22), the clamping bore (28) having a third axis (Z) perpendicular to the reference plane (P);
• wherein each side surface (26) comprises:
• a first cutting edge (40) formed at an intersection of the side surface (26) and the insert top surface (22);
• a second cutting edge (42) connected to the first cutting edge (40) and extending transversely thereto;
• a ramping cutting edge (44) connected to the second edge (42);
• and
• a rake surface (38) extending from at least a portion of the first cutting edge (40) towards the insert seating surface (20);
• wherein
• in a side view along the second axis (Y), a main cutting edge portion (52) of the first cutting edge (40), and a first ramping cutting edge portion (56) of the ramping cutting edge (44), are spaced apart from one another and converge outwardly, along the first axis (X).