ABRASIVE GRADING CONVERSION CHART
Steel abrasives are often measured in grit size indicating the number of particles in a specific area, whereas mesh sizes measure the particle size passing a woven wire screen.
Non-steel abrasives larger than 40 grit also use the direct pressure delivery blasting cabinets to pneumatically push the larger and heavier abrasives. Media Blast & Abrasive recommends the PowerPeen for these larger sizes.
Siphon abrasive blasting cabinets, i.e. the N-200 can also use steel type abrasives when the size is 80 grit and smaller. Normally a larger production gun is used to boost the siphon-feed of these larger/heavier abrasives. We offer additional information related to:
(This chart is only a guideline. Consult abrasive manufacturer for model-specific information.)
GRIT | Mesh USS* | Maximum | Inches Average |
Minimum | Maximum | Microns Average |
Minimum | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
8 | 7 | 0.1300 | 0.0870 | 0.0650 | 3300 | 2210 | 1650 | ||||||
10 | 8 | 0.1300 | 0.0730 | 0.0550 | 2286 | 1854 | 1397 | ||||||
12 | 10 | 0.0900 | 0.0630 | 0.0450 | 2286 | 1600 | 1143 | ||||||
14 | 12 | 0.0750 | 0.0530 | 0.0370 | 1905 | 1346 | 940 | ||||||
16 | 14 | 0.0650 | 0.0430 | 0.0310 | 1650 | 1092 | 787 | ||||||
20 | 16 | 0.0530 | 0.0370 | 0.0260 | 1346 | 940 | 660 | ||||||
24 | 20 | 0.0430 | 0.0270 | 0.0180 | 1092 | 686 | 487 | ||||||
30 | 25 | 0.0320 | 0.0220 | 0.0140 | 813 | 559 | 356 | ||||||
36 | 30 | 0.0300 | 0.0190 | 0.0120 | 762 | 483 | 305 | ||||||
46 | 40 | 0-022 | 0.0140 | 0.0095 | 559 | 356 | 241 | ||||||
54 | 45 | 0.0195 | 0.0120 | 0.0080 | 495 | 305 | 203 | ||||||
60 | 50 | 0.0160 | 0.0100 | 0.0065 | 406 | 254 | 165 | ||||||
70 | 60 | 0.0130 | 0.0080 | 0.0050 | 330 | 203 | 127 | ||||||
80 | 70 | 0.0115 | 0.0065 | 0.0040 | 292 | 165 | 102 | ||||||
90 | 80 | 0.0095 | 0.0057 | 0.0035 | 241 | 145 | 89 | ||||||
100 | 100 | 0.0080 | 0.0048 | 0.0025 | 203 | 122 | 63 | ||||||
120 | 120 | 0.0065 | 0.0040 | 0.0020 | 165 | 102 | 50 | ||||||
150 | 140 | 0.0055 | 0.0035 | 0.0015 | 140 | 89 | 38 | ||||||
180 | 170 | 0.0045 | 0.0030 | 0.0010 | 114 | 76 | 25 | ||||||
220 | 200 | 0.0040 | 0.0025 | 0.0008 | 102 | 63 | 20 | ||||||
240 | 200 | 0.0033 | 0.0020 | 0.00099 | 85 | 50 | 25 | ||||||
280 | ** | 0.0028 | 0.00154 | 0.00075 | 70 | 39 | 9 | ||||||
320 | ** | 0.0024 | 0.00122 | 0.00055 | 60 | 31 | 14 | ||||||
400 | ** | 0.0018 | 0.00087 | 0.00043 | 45 | 22 | 11 | ||||||
500 | ** | 0.0016 | 0.00075 | 0.00039 | 40 | 19 | 10 | ||||||
600 | **, ^ | 0.0014 | 0.00063 | 0.00035 | 35 | 16 | 9 | ||||||
700 | **, ^ | 0.0013 | 0.00055 | 0.00028 | 32 | 14 | 7 | ||||||
800 | **, ^ | 0.0012 | 0.00047 | 0.00020 | 30 | 12 | 5 | ||||||
900 | **, ^ | 0.0009 | 0.00035 | 0.00012 | 23 | 9 | 3 | ||||||
1000 | **, ^ | 0.0009 | 0.00028 | 0.00008 | 23 | 7 | 2 | ||||||
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