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325 mesh to micron: 45 µm (0.045 mm)
325 mesh is an opening of 45 microns, which is 0.045 mm or 0.00177 inch, on the ASTM E11 US standard sieve series. The nearest wedge wire equivalent is a 45 micron (0.045 mm) slot, because wedge wire is specified by its slot rather than a mesh count.
Opening45 µm
- Millimetres
- 0.045 mm
- Inches
- 0.001772 in
- Thou (mil)
- 1.772 thou
- Mesh
- 325 mesh
- Nearest coarser sieve
- 325 mesh, 45 µm
- Nearest finer sieve
- 325 mesh, 45 µm
Equivalent wedge wire slot: 45 micron (0.045 mm)
Wedge wire is specified by its slot directly, so a wedge wire screen has no mesh count. Quote the slot in mm or microns.
Your inputs and results go into the quote form, so an engineer can check them against your operating conditions.
Nearby sizes
Mesh sizes near 325 mesh
| Mesh | Micron (µm) | mm |
|---|---|---|
| 200 mesh | 75 | 0.075 |
| 230 mesh | 63 | 0.063 |
| 270 mesh | 53 | 0.053 |
| 325 mesh | 45 | 0.045 |
| 400 mesh | 38 | 0.038 |
| 500 mesh | 25 | 0.025 |
| 635 mesh | 20 | 0.02 |
Swipe sideways to see the whole table.
What passes through 325 mesh
As a general reference on the Wentworth grade scale, particles smaller than 45 µm pass: clay. Real separation also depends on particle shape, the screen's open area and how the screen is loaded.
The wedge wire equivalent
A wedge wire screen is specified by its slot, so the equivalent is a 45 micron (0.045 mm) slot. Because the V-shaped wire widens behind the slot, particles that pass the face do not wedge in it. See mesh to micron and slot size and how to choose slot and open area.