Table 2.

Experimental results of electrolytic milling.

Variables	Spindle speed (Rev/min)	Feed rate (mm/min)	Electrolyte concentration (%)	External voltage (V)	Radial cutting depth (mm)	Wall thickness after machining(mm)
1	125	50	5	5	0.25	2.19
2	250	100	10	10	0.5	2.04
3	375	150	15	15	0.75	2.08
4	500	200	20	20	1	1.74
5	125	100	15	20	0.25	2.16
6	250	150	20	5	0.5	2.08
7	375	200	5	10	0.75	2.15
8	500	50	10	15	1	2.01
9	125	150	10	20	0.75	2.11
10	250	200	5	15	1	2.16
11	375	50	20	10	0.25	1.80
12	500	100	15	5	0.5	1.81
13	125	200	10	15	1	2.16
14	250	50	15	20	0.25	2.13
15	375	100	20	5	0.5	1.92
16	500	150	5	10	0.75	2.14