Choosing an end mill

 

Unsure about which type of end mill is most suitable? Here are some fundamental considerations you should make before you buy.

The material to be milled

Different materials have different hardnessess and require different grades of carbide, different coatings, and different coolants to be effectively milled. In order to choose the most suitable end mill first determine the material to be milled, you can then match the hardness and characteristics of the material to be milled with an end mill that is suitable for milling that particular material. 


The shape of the end mill

For example, a ball end mill or square end mill, each shape gives a different finish and is used in differing applications, these are just some of the many shapes available. 

The type of center

Non-centre cutting is used only for profiling and open slotting. Centre cutting, in addition to profiling and open slotting, allows for contour slotting, plunge slotting , and other milling operations. 

The number of flutes

The more flutes means less space for chip ejection, increased rigidity, faster table feed, and excellent surface finish. Fewer flutes mean more space for chip ejection, decreased rigidity, and a lower quality surface finish.