Corner radius end mills combine a flat cutting bottom with a small radius at the tool corners. This design significantly improves tool strength compared to sharp-corner square end mills, reducing edge chipping and extending tool life. They are ideal for semi-finishing and finishing operations where surface integrity and durability are important. Corner radius end mills are widely used in mold and die, aerospace, and precision machining. Selection should focus on radius size, coating, and flute design to balance cutting performance and tool longevity.