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. 2019 Mar 26;10(3):214. doi: 10.3390/mi10030214

Table 6.

Sa and Ra minimum achievable roughness.

Parameter Initial Roughness Minimum Achievable Roughness
Top Bottom
Sa 0.15 µm 0.083 µm 0.045 µm
0.63 µm 0.414 µm 0.221 µm
Ra 0.10 µm 0.033 µm 0.028 µm
0.14 µm 0.055 µm 0.032 µm