Aluminium Oxide & Silicon Carbide Grains
FEPA-Standard 42-1:2006: Grains of fused aluminium oxide, silicon carbide and other abrasive materials for bonded abrasives and for general industrial applications Macrogrits F 4 to F 220
FEPA-Standard 42-2:2006: Grains of fused aluminium oxide, silicon carbide and other abrasive materials for bonded abrasives and for general industrial applications Microgrits F 230 to F 2000
The mean diameters of macrogrits shown in the table are estimated and for information only, the FEPA-Standard defines them as a range and not a single value.
|
MACROGRITS |
|
MICROGRITS |
|
Grit
designation |
Mean
Diameter
in µm |
|
Grit
designation |
Mean grain
size ds50-value in μm |
|
F 4 |
4890 |
|
F 230 |
53.0 ± 3 |
|
F 5 |
4125 |
|
F 240 |
44.5 ± 2 |
|
F 6 |
3460 |
|
F 280 |
36.5 ± 1.5 |
|
F 7 |
2900 |
|
F 320 |
29.2 ± 1.5 |
|
F 8 |
2460 |
|
F 360 |
22.8 ± 1.5 |
|
F 10 |
2085 |
|
F 400 |
17.3 ± 1 |
|
F 12 |
1765 |
|
F 500 |
12.8 ± 1 |
|
F 14 |
1470 |
|
F 600 |
9.3 ± 1 |
|
F 16 |
1230 |
|
F 800 |
6.5 ± 1 |
|
F 20 |
1040 |
|
F 1000 |
4.5 ± 0.8 |
|
F 22 |
885 |
|
F 1200 |
3.0 ± 0.5 |
|
F 24 |
745 |
|
|
2.0 ± 0.4 |
|
F 30 |
625 |
|
|
1.2 ± 0.3 |
|
F 36 |
525 |
|
|
|
|
F 40 |
438 |
|
|
|
|
F 46 |
370 |
|
|
|
|
F 54 |
310 |
|
|
|
|
F 60 |
260 |
|
|
|
|
F 70 |
218 |
|
|
|
|
F 80 |
185 |
|
|
|
|
F 90 |
154 |
|
|
|
|
F 100 |
129 |
|
|
|
|
F 120 |
109 |
|
|
|
|
F 150 |
82 |
|
|
|
|
F 180 |
69 |
|
|
|
|
F 220 |
58 |
|
|
|
The particle size distribution of macrogrits is determined by sieving, while the microgrits have been measured by sedimentation (photosedimentometer).
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