END MILL OF SMALL DIAMETER FOR CUTTING CONTOUR LINE

摘要

PROBLEM TO BE SOLVED: To provide the radius end mill of a small diameter by which contour line cutting can be used to perform deep cutting processing with high efficiency. SOLUTION: This radius end mill is provided with a peripheral edge, an end cutting edge having a low and a medium gradient and an edge portion in which an edge with a corner R is formed at the connecting portion between these peripheral edge and end cutting edge, the peripheral edge is formed so that its rotating track can be made to be the track of an inversely tapered shape and the side angel of this inversely tapered shape is formed to be an angle in 3 deg. to 30 deg..