Diamond Grit Size
Grit size classification by sieves is only feasible up to #325 mesh. After this, the grit size is still indicated by number (#...), but the method of classification is different. Grit sizes can be more accurately understood by correlating them to their respective mesh sizes and grit size scatter in diameter (see chart below).
|
Norminal grit
Size(mesh)
|
Grit size range in
mesh of the grits use
|
Grit size in diameter (µm)
|
Grit size scatter in diameter (inch)
|
|
16
|
16/20
|
1190-940
|
0.047-0.037
|
|
20
|
20/30
|
940-740
|
0.037-0.029
|
|
30
|
30/40
|
740-570
|
0.029-0.022
|
|
40
|
40/50
|
570-430
|
0.022-0.017
|
|
50
|
50/60
|
430-320
|
0.017-0.012
|
|
60
|
60/80
|
320-250
|
0.012-0.01
|
|
80
|
80/100
|
250-210
|
0.01-0.008
|
|
100
|
100/120
|
210-170
|
0.008-0.007
|
|
120
|
120/140
|
170-150
|
0.007-0.006
|
|
140
|
140/170
|
150-130
|
0.006-0.005
|
|
170
|
170/200
|
130-110
|
0.005-0.004
|
|
200
|
200/230
|
110-99
|
0.004-0.0035
|
|
230
|
230/270
|
90-70
|
0.0035-0.003
|
|
270
|
270/325
|
70-60
|
0.003-0.0024
|
|
325
|
325/400
|
60-55
|
0.0024-0.0022
|
|
400
|
|
40-60
|
0.0016-0.0024
|
|
600
|
|
30-50
|
0.0012-0.002
|
|
800
|
|
20-40
|
0.008-0.0016
|
|
1000
|
|
12-25
|
0.0005-0.001
|
|
1500
|
|
8-15
|
0.0003-0.0006
|
|
2000
|
|
5-10
|
0.0002-0.004
|
|
No.
|
US Standard
Micron Range
|
Mesh Sizes
|
Grade No.
|
US Standard
Micron Range
|
Mesh Sizes
|
|
1/4
|
0 - 1/2
|
60,000
|
35
|
30 - 40
|
500
|
|
1/2
|
0 - 1
|
25,000
|
45
|
36 - 54
|
450
|
|
1
|
0 - 2
|
10,000
|
400
|
35/45
|
325/400
|
|
2
|
1 - 3
|
9,000
|
320
|
45/53
|
270/325
|
|
3
|
2 - 4
|
8,500
|
240
|
53/63
|
230/270
|
|
4
|
2 - 6
|
6,000
|
220
|
63/75
|
200/230
|
|
6
|
4 - 8
|
3,000
|
180
|
75/90
|
170/200
|
|
9
|
6 - 12
|
1,800
|
150
|
90/106
|
140/170
|
|
12
|
8 - 15
|
1,500
|
120
|
106/125
|
120/140
|
|
15
|
10 - 20
|
1,200
|
110
|
125/150
|
100/120
|
|
17
|
15 - 20
|
1,100
|
105
|
150/180
|
80/100
|
|
20
|
15 - 25
|
1,000
|
100
|
180/250
|
60/80
|
|
25
|
20 - 30
|
880
|
60
|
250/300
|
50/60
|
|
30
|
22 - 36
|
600
|
46
|
300/425
|
40/50
|
A
