what is a ball end mill used for

A ball end mill is a type of milling cutter that has a rounded end instead of a flat one. It is commonly used in machining complex surfaces and 3D shapes with contoured details. Ball end mills are versatile tools and are often used for:

Contouring: Creating intricate shapes and contours in workpieces.

3D Profiling: Milling complex three-dimensional surfaces with varying depths.

Die Cutting: Making molds and dies with smooth curves and contours.

Engraving: Adding decorative or functional engravings to a workpiece.

Roughing and Finishing: Removing material quickly (roughing) or achieving a fine surface finish (finishing).

Overall, the ball end mill's rounded tip allows for smooth machining operations and is particularly useful when working on curved surfaces or when a radius is needed in the final part design.