Partical Size









APPROXIMATE PARTICLE COUNT  
& SIZE OF DIAMOND POWDERS
MESH
GRADE
ABRASIVE
GRIT SIZE
MICRON
SIZE
PARTICLES
IN ONE CARAT
SIZE IN
INCHES
30
590
282
0.0230
35
500
460
0.0190
40
420
770
0.0160
50
297
2,080
0.0120
60
250
3,240
0.0100
80
177
10,400
0.0070
100
149
17,140
0.0060
120
125
20,920
0.0050
140
105
49,400
0.0040
170
88
83,400
0.0035
200
74
140,000
0.0030
230
62
252,000
0.0024
270
53
384,000
0.0020
325
45
660,000
0.0017
400
37
1,120,000
0.0015
500
35
1,192,800
0.0014
600
30
2,046,000
0.0012
800
25
9,503,000
0.0009

MESH SIZE
GRIT
SIZE
16/20
16
20/30
20
30/40
30
40/50
40
50/60
50
60/80
60
80/100
80
100/120
100
120/140
120
140/170
140
170/200
180
200/230
220
230/270
240
270/325
270
325/400
325


                              MICRO FINISH SELECTOR
                          U.S. BUREAU OF STANDARDS
MICRON
RANGE
MICRONIZED
GRADE NUMBERS
MESH SIZE
EQUIVALENT
TYPICAL FINISH
MICRO INCHES
45
36-54
450
15-25
35
30-40
500
10-15
30
22-36
600
7-9
25
20-30
800
5-9
20
15-25
1000
4-8
17
15-20
1100
4-7
15
10-20
1200
4-6
12
8-15
1500
3-6
9
6-15
1800
3-5
6
4-8
3000
2-3