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Table 5.

Experimental results of surface roughness of dry and MQL condition.

Sth Run x1 x2 x3 x4 Dry surface roughness (Ra) MQL surface roughness (Ra) % reduction in surface roughness (Ra)
13 1 1500 150 25 2 1.12 0.94 16.07
14 2 2500 150 25 2 0.95 0.85 10.53
8 3 2500 300 25 1 1.17 1.02 12.82
11 4 1500 300 15 2 1.27 1.11 12.60
9 5 1500 150 15 2 1.10 0.92 16.36
24 6 2000 200 20 2.5 1.21 1.10 9.09
1 7 1500 150 15 1 1.08 0.90 16.67
25 8 2000 200 20 1.5 1.20 1.01 15.83
5 9 1500 150 25 1 1.04 0.88 15.38
18 10 3000 200 20 1.5 0.61 0.51 16.39
20 11 2000 500 20 1.5 1.31 1.16 11.45
16 12 2500 300 25 2 1.26 1.10 12.70
19 13 2000 100 20 1.5 0.58 0.50 13.79
4 14 2500 300 15 1 1.13 0.98 13.27
22 15 2000 200 30 1.5 1.16 1.00 8.62
23 16 2000 200 20 0.5 1.03 0.88 −11.96
26 17 2000 200 20 1.5 1.17 1.08 7.69
10 18 2500 150 15 2 1.05 0.93 11.43
2 19 2500 150 15 1 0.84 0.74 11.90
27 20 2000 200 20 1.5 1.18 1.08 8.47
17 21 1000 200 20 1.5 1.28 1.12 12.50
12 22 2500 300 15 2 1.22 1.07 12.30
15 23 1500 300 25 2 1.29 1.14 11.63
21 24 2000 200 10 1.5 1.15 0.92 20.00
30 25 2000 200 20 1.5 1.19 0.96 19.33
3 26 1500 300 15 1 1.26 1.06 15.87
7 27 1500 300 25 1 1.24 1.04 16.13
6 28 2500 150 25 1 0.75 0.60 20.00
29 29 2000 200 20 1.5 1.13 1.01 10.62
28 30 2000 200 20 1.5 1.15 1.01 12.17

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