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Grit Size vs. Surface Roughness

Comparing sandpaper grit size and surface roughness.

sandpaper grit sizes

Approximate comparision of sandpaper grit size and surface roughness:

Grit Size vs. Surface Roughness
Grit SizeSurface Roughness
(10-6 m)
80 1.80
120 1.32
150 1.06
180 0.76
240 0.38
320 0.30
500 0.18
600 0.13

Sandpaper - grit size vs. surface roughness

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