The following table is the diamond mesh size for diamond tool and floor surface preparation in China and other main countries:
Theoretical Basic
Size
China
International Standard
FEPA
USA
JAPAN
RUSSIA
GB/T6406-1995
ISO
ANSI B74.16-1971
JIS4130-1998
9206-80
Inch
Millimeter
Grit No.
Mesh Size
Grit No.1
Grit No.2
Mesh Size/Grain Size
Grit No.
Mesh Size
Grit No.
Mesh Size
Grit No.
Mesh Size
Grit No.
Mesh Size
0.015
0.378
40/50
425/300
427
40/50
425/300
B/427
355/300
40/50
425/300
40/50
425/300
500/400
500/400
0.011
0.288
50/60
300/250
301
50/60
300/250
B/301
300/250
50/60
300/250
50/60
300/250
400/315
400/315
0.009
0.226
60/80
250/180
252
60/80
250/180
B/252
250/180
60/80
250/180
60/80
250/180
250/200
250/200
0.0069
0.174
80/100
180/150
181
80/100
180/150
B/181
180/150
80/100
180/150
80/100
180/150
200/160
200/160
0.0058
0.148
100/120
150/125
151
100/120
150/125
B/151
150/125
100/120
150/125
100/120
150/125
160/125
160/125
0.0048
0.123
120/140
125/106
126
120/140
125/106
B/126
125/106
120/140
125/106
120/140
125/106
125/100
125/100
0.0041
0.103
140/170
106/90
107
140/170
106/90
B/107
106/90
140/170
106/90
140/170
106/90
100/80
100/80
0.0034
0.866
170/200
90/75
91
170/200
90/75
B/91
90/75
170/200
90/75
170/200
90/75
80/63
80/63
0.0030
0.075
200/230
75/63
76
200/230
75/63
B/76
75/63
200/230
75/63
200/230
75/63
63/50
63/50
0.0026
0.066
230/270
63/53
64
230/270
63/53
B/64
63/53
230/270
63/53
230/270
63/53
50/40
50/40
0.0022
0.057
270/325
53/45
54
270/325
53/45
B/54
53/45
270/325
53/45
270/325
53/45
0.0019
0.048
325/400
45/38
46
325/400
45/38
B/46
45/38
325/400
45/38
325/400
45/38
Edited by: GDT|Gooddiamondtool.com
PDF version, please click: Diamond Grit number mesh size