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Milling
Equipment>Tech
Data>Reference Informaton
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Conversion &
Sizing Data
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Table of Standard Sieves
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| Microns |
Inches |
U.S. Standard ASTME 11-61 |
British Standard BSS: 410-1989 |
Tyler |
| 3360 |
0.1320 |
6 |
5 |
6 |
| 2830 |
0.1110 |
7 |
6 |
7 |
| 2380 |
0.0937 |
8 |
7 |
8 |
| 2000 |
0.0787 |
10 |
8 |
9 |
| 1680 |
0.0661 |
12 |
10 |
12 |
| 1410 |
0.5550 |
14 |
12 |
12 |
| 1190 |
0.4690 |
16 |
14 |
14 |
| 1000 |
0.0394 |
18 |
16 |
16 |
| 840 |
0.0331 |
20 |
18 |
20 |
| 707 |
0.2800 |
25 |
22 |
24 |
| 595 |
0.0232 |
30 |
25 |
28 |
| 500 |
0.0197 |
35 |
30 |
32 |
| 420 |
0.0165 |
40 |
36 |
35 |
| 354 |
0.0138 |
45 |
44 |
42 |
| 297 |
0.0117 |
50 |
52 |
48 |
| 250 |
0.0098 |
60 |
60 |
60 |
| 210 |
0.0083 |
70 |
72 |
65 |
| 177 |
0.0070 |
80 |
85 |
80 |
| 149 |
0.0059 |
100 |
100 |
100 |
| 125 |
0.0049 |
120 |
120 |
115 |
| 105 |
0.0041 |
140 |
150 |
150 |
| 88 |
0.0035 |
170 |
170 |
170 |
| 74 |
0.0029 |
200 |
200 |
200 |
| 63 |
0.0025 |
230 |
240 |
250 |
| 53 |
0.0021 |
270 |
300 |
270 |
| 44 |
0.0017 |
325 |
350 |
325 |
| 37 |
0.0015 |
400 |
400 |
400 |
| 32 |
0.0013 |
450 |
440 |
450 |
| 25 |
0.0010 |
500 |
– |
500 |
| 20 |
0.0008 |
635 |
– |
635 |
| 13 |
0.0005 |
1000 |
– |
1000 |
| 10 |
0.0004 |
– |
– |
1250 |
| 5 |
0.0002 |
– |
– |
5000 |
| 1 |
0.00004 |
1 |
– |
10000 |
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Table of Relative Sizes |
| Material |
Approx. Size Limit |
Size in Angstroms |
| Proton |
2 x 10-9 |
2 x-7 |
| Electron |
38 x19 -7 nm |
3.8 x 10 -6 |
| Cosmic Ray |
5 x 10-5 nm |
0.0005 |
| Shortest X-Rays |
0.006 nm |
0.06 |
| Diameter of Hydrogen Atom |
10.8 nn |
1.08 |
| Longest X-Rays |
8 nm |
80 |
| Colloidal Particles |
2 - 100 nm |
20 - 1,000 |
| Lower Limit of Microscopy |
100 nm |
1,000 |
| Wave-Length of Violet Light |
400 nm |
4,000 |
| Wave-Length of Red Light |
650 nm |
6,500 |
| Bacteria
(cocci) |
2 µ |
20,000 |
| Red Blood Cells |
8 µ |
80,000 |
| White Blood Cells |
25 µ |
250,000 |
| Lower Limit of Vision (naked eye) |
40 µ |
400,000 |
| 325 Mesh Opening |
44 µ |
440,000 |
| Diameter of Human Hair |
50 µ |
500,000 |
| 100 Mesh Opening |
149 µ |
1,490,000 |
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| Table
of Equivalent Sizes |
| Unit |
Meters |
Inches |
Millimeters |
Microns |
Nanometers |
Angstroms |
Picometers |
| Meter |
1 |
39.37 |
103 |
106 |
109 |
1010 |
1012 |
| Inch |
0.0254 |
1 |
25.4 |
25,500 |
2.54 x 10 7 |
2.54 x 10 8 |
2.54 x 1010 |
| Millimeters |
10-3 |
0.394 |
1 |
1000 |
10-6 |
10-7 |
10-10 |
| Microns |
10-6 |
3.94 x 10-5 |
10-3 |
1 |
1000 |
10,000 |
10-6 |
| Nanometers |
10-9 |
3.94 x 10-8 |
10-6 |
10-3 |
1 |
10 |
10,000 |
| Angstrom Units |
10-10 |
3.94 x 10-9 |
10-7 |
10-4 |
0.1 |
1 |
100 |
| Picometers |
10-12 |
3.94 x 10-11 |
10-9 |
10-6 |
10-3 |
0.01 |
1 |
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