*3.3. Cutting Parameters*

The trials were carried out in a Tongtai TMV510 machining center (Tongtai Machine & Tool Co., Luzhu Dist, Kaohsiung City, Taiwan) equipped with a Fanuc Control Numeric Computer (CNC) (FANUC Iberia, Castelldefels, Barcelona, Spain) (Figure 4) under dry conditions. The values usually used during repair and maintenance operations were selected for the factor levels of feed rate, *f*: 50 mm/min and 100 mm/min; cutting speed, *V*: 20 m/min and 25 m/min; and depth of cut, *d*: 0.25 mm.

**Figure 4.** Tongtai TMV510 machining center equipped with a Fanuc Control Numeric Computer (CNC).
