Miniature ball end mills have a smaller diameter than standard ball end mills, which allows them to provide more precision and better control over material removal during milling tasks. They are suitable for detailed milling applications such as dental milling or small-electronics manufacturing. These end mills are made from cubic boron nitride (CBN), which is harder than carbide and is suitable for finishing hardened steels with a Rockwell hardness of 65 to 70 HRC. Ball end mills have a rounded nose that creates a round-bottomed groove in milling tasks. Also known as miniature ball-nose end mills, they are rotated against a workpiece to make round-bottomed slots and pockets or mill complex shapes without sharp corners.