 Read More Whats the difference between flat, ball nose and corner Sep 00, 0000· In addition, we can also divide the end mill into a flat ball nose and corner radius cutter. Whats the difference between these types? As a professional manufacturer of end mill, UKO tell you. Flat end mill. Flat end mill is the most popular end mill for our customers, of which 0 flute, 0 flute, 0 flute, and 0 flute aremon. The less