Table 1.

Experimental cutting conditions.

Cutting Condition (CC)	Drill Diameter, D (mm)	Spindle Speed, n (rpm)	Feed Rate, fr (mm/rev)	No. of Hole
CC1	0.4	10,186	0.003	44
CC2	0.4	14,186	0.002	79
CC3	0.4	19,099	0.001	41
CC4	0.4	19,099	0.003	11
CC5	0.4	14,186	0.003	24