Optimisation of Cutting Tool and Cutting Parameters in Face Milling of Custom 450 through the Taguchi Method

Table 3

Control factors and their levels.

Control factors	Unit	Code	Levels
			1	2	3	4
Cutting tool (Ct)	—	A	T1	T2	T3	T4
Cutting speed (Vc)	m/min	B	40	80	120	160
Feed rate (f)	mm/rev	C	0.05	0.10	0.15	0.20