What is an end mill? This is one of the more critical elements that determines the performance of an end mill. A limited number of blades on an end mill can result in a lower cross-sectional space, which can cause bending while cutting. However, on contrary there is plenty of space for chip discharge, making it easy to remove chips. The chip pocket can shrink when there are too many blades. This can lead to a lower capacity for chip storage, but it also increases its stiffness and the cross-sectional area. https://www.sundicuttingtools.com/products/carbide-milling-cutter/