The first physical aspect of an end mill is cutting diameter which in some cases might be different than the shank diameter which is to be gripped in the tool holder. End mills come in standard length or long version. Less number of flutes provide more room between the flutes and more chip load capacity for roughing or cutting soft materials.

Are a very important feature that should be considered when ordering an End Mill. They are made from Carbide which are very tough but brittle. The coatings cover the cutting edges and make them much harder and increase its temperature resistance significantly.

Carbide End Mills with more flutes are better choices for general and finishing purposes producing less chatter.The end mill tip surface defines if it is a center cutting or non-center cutting. End Mills with corner rad can be a good choice for machining non-sharp corners and rough machining applications since the sharp End Mills are more susceptible to chipping. Ball nose End mills are so beneficial whenever the cutting edges are not perpendicular to end mill axis.