Surface Roughness vs. Abrasive Grain Size

U.S. mesh size vs. surface roughness. Reference table showing the relationship between abrasive grain size and workpiece 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