| 摘要 |
<p>An object of this invention is to provide a rotary cutting tool capable of efficiently performing pocket processing and right-angle processing for four corners having a small diameter, without repetitive cutting by using a small-diameter end mill; and a cutting method using the same. To this end, an end mill (10), which is a tool for cutting a metal block such as a mold, is used by being set in a machine tool such as a milling machine. The end mill (10) has two cutting blades (11a, 11b) in the front end portion, and the point angle (D1) defined by the two cutting blades (11a, 11b) is 70.53 degrees.</p> |
