Mesh (scale) - Variation in Mesh Openings

Variation in Mesh Openings

Some standards use the mesh designation as the number of wires rather than the size of openings (see Tyler, above). There can be significant differences in particle size passing small laboratory screens versus large heavy-duty industrial screens due to the different wire sizes used. Thicker wire results in a smaller opening size for an equivalent mesh. An example of variation moving between machine sizes is:

Laboratory sieve cloth
Sieve Designation	Wire width			Opening
10 Mesh	U.S. Std. No. 12	0.800mm	0.0315in	1.7mm	0.0669in (0.0661 nominal)

Medium industrial screen cloth
Sieve	Wire Width	Opening	Opening
10 Mesh	0.035 in	0.0650 in	1651 μm

Heavy industrial screen cloth
Sieve	Wire Width	Opening	Opening
10 Mesh	0.047 in	0.053 in	1346 μm

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