How is mesh size measured?

 Mesh size measures the number of openings per linear inch or centimeter in a sieve or screen. It is typically used to describe the size of an abrasive particle. Rather than measuring particle size precisely, mesh size refers to the average size of the range of particles in a grade. 

To measure the mesh size, the size of the openings in the mesh is first determined. It is done using a micrometer or other precision measuring tool. A sieve or screen opening size is divided by the sieve or screen total length to determine how many openings per linear inch or centimeter exist.



For example, if a sieve has openings that are 0.5mm in size and the total length of the sieve is 100mm, the mesh size would be calculated as follows:

100mm / 0.5mm = 200 mesh

This means that the sieve has 200 openings per linear inch or centimeter.

Higher mesh numbers result in smaller openings in the screen, which allows smaller particles to pass through. Conversely, the larger the mesh opening, the larger the particles that will pass through. The thicker the strands, there will be smaller openings a particle can pass through. 

The mesh number can vary depending on the grit that is used. A single mesh number is used for Aluminum Oxide Grit or Silicon Carbide Grit, whereas two numbers are used for Walnut Shell Grit or Glass Beads. The mesh size of an abrasive particle is noticed with either a minus or plus sign. The signs denote that the particles are smaller than or larger than the mesh size. 

Visit Kramer Industries to learn about the different mesh sizes for your abrasives. You can check out the mesh conversion chart to find the approximate dimensions in inches and microns for various mesh sizes.

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