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. 2018 Sep 13;13(9):e0203838. doi: 10.1371/journal.pone.0203838

Table 5. Average roughness of machined surface with different cutting parameters.

Test number 1 2 3 4 5 6 7 8 9
n (r/min) 250 250 250 710 710 710 1120 1120 1120
Fn (mm/r) 0.1 0.2 0.3 0.1 0.2 0.3 0.1 0.2 0.3
Ra 9.5 11.0 12.6 8.5 10.7 11.4 6.7 9.6 10.2