ISCAR TIP TALK - What is ?roll-in entering? in milling? [Milling]

Roll-in entering or, simply, rolling in is a method of approaching a material in milling. In rolling in, a milling cutter enters the material by arc that causes a gradual growth of mechanical and thermal load on a cutting edge. This approach cut significantly contributes to machining stability and improves tool life. Rolling in is contrary to the traditional straight entering, when the load suddenly increases.