Nominal Median Size Designations

ALUMINUM OXIDE POWDERS

IN MICRONS (um)
(Based on the FEPA standard)

Powder Size Microns (Avg.)
 280 37
 320 29
360 23
400 17
500 13
600 9
800 7
1000 5
1200 3

 

Grit and Powder Sizing - Table of Grit Sizes

GRIT SIZING FOR

ALUMINUM OXIDES
AND
SILICON CARBIDES

Grit / Sieve Size Inches / mm
(avg.)
Microns
(avg.)
12 0.063 / 1.600 1600
16 0.043 / 1.092 1092
20 0.037 / 0.939 940
24 0.027 / 0.685 686
30 0.022 / 0.558 559
36 0.019 / 0.482 483
46 0.014 / 0.355 356
54 0.012 / 0.304 305
60 0.010 / 0.254 254
70 0.008 / 0.203 203
80 0.0065 / 0.165 165
90 0.0057 / 0.144 145
100 0.0048 / 0.121 122
120 0.0040 / 0.101 102
150 0.0035 / 0.088 89
180 0.0030 / 0.076 76
220 0.0025 / 0.063 63
240 0.0020 / 0.050 50

 

Ordering Information

Please specify x AO for our Optical Powders where x is the nominal micron size or powder mesh size.