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Surface Roughness vs. Abrasive Grain Size

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Abrasive grain size and workpiece surface roughness:

Abrasive Grain Size vs. Surface Roughness
Surface Roughness
Ra
(μm)		Abrasive Grain Size
(U.S. mesh size)
0.7 - 1.1 46
0.35 - 0.7 60
0.2 - 0.4 80
0.17 - 0.25 100
0.14 - 0.2 120
0.12 - 0.17 150
0.1 - 0.14 180
0.08 - 0.12 220
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