Minimization of Surface Roughness and Tool Vibration in CNC Milling Operation

Table 3

Factors and selected levels in milling operations.

Factor	Level
	−1	0	1
—cutting speed (m/min)	100	140	180
—axial feed (mm/tooth)	0.1	0.15	0.2
—depth of cut (mm)	0.75	1.0	1.25