Table 4.

Main variables studied in papers on milling.

Reference	Cutting Force	Cutting Temperature	Surface Integrity	Chip Morphology	Specific Cutting Energy	Tool Wear	Tool Life	Friction Coefficient	Power Consumption
[1]	x					x
[2]			x		x	x	x		x
[9]	x			x		x
[17]		x	x	x		x		x
[22]						x	x
[27]		x				x	x
[29]	x	x
[33]	x	x				x
[34]	x			x		x		x
[35]		x				x
[36]	x		x			x			x
[37]					x	x			x
[38]	x	x	x			x
[39]			x			x	x
[40]	x		x
[41]	x		x
[42]						x			x
[43]			x			x	x
[44]	x				x