abrasive mesh size

Mesh Size

1. What is Mesh Size:

Mesh size means how many opening in one linear inch of screen. For example, A 20 mesh screen has 20 openings per inch while A 100 mesh screen has 100 openings per inch, and so on. There are several mesh size systems available but varies slightly. In this article, we are talking about US standard mesh size.

The mesh number indicates higher the mesh number, finer the particle size. However, mesh size is not a precise particle size, but it gives us ground to compare particles size from different sources. In mass finishing, we use mesh size to measure abrasive grit as it related to media abrasiveness.

 

2.  Mesh Size related to abrasiveness:

Bigger mesh number means finer particle grit, which leads to low abrasiveness. In contrast, smaller mesh number means courser particles grit, which provides higher cutting power. In mass finishing tumbling media, we use mesh size to compare media aggressiveness.

Ceramic media with higher cutting power is ideal for deburring and material removal. But it also leaves a rougher surface.

Plastic media with a lower cutting power well performance for smoothing softer metal. Therefore, it creates a surface with a low Ra value.

 

Mesh Size Grit Size Abrasiveness Function
Big Mesh number 1200 (for example plastic media) 6um Low Polishing, Smoothing
Small Mesh number 320 (for example ceramic media) 36um High Deburring

Table illustration of mesh size in relation to tumbling media abrasiveness

 

particle size relation to cutting performance
particle size relation to cutting performance

 

A study has been made by (Moore 1974; Nathan & Jones 1966) regarding “Effect of grain size on stock removed for abrasive wear studies”. We can compare the cutting power for different abrasive size against the main metal categories.

 

3. Mesh Conversion Chart

The table below shows us mesh size conversion with micron and inches. These values are basically correct and mesh wire is based on the American National Standard wire cloth to get the value.

Standard ASTM E11-17, ISO 565-1990, and ISO 3310-1:2016 sieve specifications.

 

US Mesh Micron Inches
4 4,750 um 0.187
5 4,000 um 0.157
6 3,350 um 0.132
7 2,800 um 0.111
8 2,360 um 0.0937
10 2,000 um 0.0787
12 1,700 um 0.0661
14 1,400 um 0.0555
16 1,200 um 0.0473
18 1,000 um 0.0394
20 850 um 0.0331
24 690 um 0.027
30 560 um 0.022
36 485 um 0.019
40 425 um 0.016
46 355 um 0.014
54 305 um 0.012
60 250 um 0.01
70 210 um 0.0083
80 165 um 0.0065
90 145 um 0.0057
100 149 um 0.0059
120 125 um 0.0049
140 105 um 0.0041
150 89 um 0.0035
170 88 um 0.0031
180 76 um 0.003
200 75 um 0.0029
220 63 um 0.0025
240 53 um 0.002
280 44 um 0.0015
320 36 um 0.0012
400 23 um 0.00087
500 19 um 0.00075
600 16 um 0.00063
800 12 um 0.00047
1,000 9 um 0.00028
1,200 6 um 0.00024

Note: (American Standard ASTM-E 11)