Ball knife and round nose knife
The ball knives are generally monolithic. The new knives are precisely sized and can be machined with small recessed areas. However, no matter how high the speed is, the center point of the ball cutter is always stationary, and the ball cutter is the milling cutter whose blade is a semi-spherical ball. The round nose knife refers to the length of the arc portion to be larger than 1/4 circle. Generally, the low blade has a section that is flat and has arcs at both ends.