Gradient Boosted Trees Predictive Models for Surface Roughness in High-Speed Milling in the Steel and Aluminum Metalworking Industry

Table 2

Examples of machining cutting conditions and Ra values in Exp-1.

Machine	diam; (mm)	flutes	ap; (mm)	F; (mm min^−1)	n; (rpm)	Ra; (nm)
1	6	2	0.2	1500	5000	Smooth
	6	6	0.4	1500	6250	Smooth
	8	2	0.6	1875	5000	Semi-Fine
	8	6	1	2250	6250	Smooth
	10	6	0.2	2625	5000	Semi-Fine
	10	2	0.4	1875	8750	Fine
2	6	2	0.2	2250	5000	Smooth
	6	2	0.4	2250	7500	Semi-Fine
	6	6	0.6	1500	8750	Smooth
	8	2	1	1875	6250	Fine
	8	6	0.2	2250	5000	Smooth
	10	6	0.4	2625	7500	Smooth