2、The Grit-Number and Granule-size of Synthetic Diamond or CBN(Cubic Boron Nitride):
(1).Original criterion of Industry Department(JB2808-79)
Grit-Number |
Size(μ) |
Grit-Number |
Size (μ) |
36# |
500~400 |
W40 |
40~28 |
46# |
400~315 |
W28 |
28~20 |
60# |
315~250 |
W20 |
20~14 |
70# |
250~200 |
W14 |
14~10 |
80# |
200~160 |
W10 |
10~7 |
100# |
160~125 |
W7 |
7~5 |
120# |
125~100 |
W5 |
5~3.5 |
150# |
100~80 |
W3.5 |
3.5~2.5 |
180# |
80~63 |
W2.5 |
2.5~1.5 |
240# |
63~50 |
W1.5 |
1.5~0.5 |
280# |
50~40 |
W1.0 |
1.0 following |
|
|
W0.5 |
0.5 following |
(2).Criterion of China(GB6405-86)
Grit-Number |
Size(μ) |
Grit-Number |
Size(μ) |
30/35 |
600~500 |
0-0.5 |
0~0.5 |
35/40 |
500~425 |
0-1 |
0~1 |
40/45 |
425~355 |
0.5-1 |
0.5~1 |
45/50 |
355~300 |
0.5-1.5 |
0.5~1.5 |
50/60 |
300~250 |
0-2 |
0~2 |
60/70 |
250~212 |
1.5-3 |
1.5~3 |
70/80 |
212~180 |
2-4 |
2~4 |
80/100 |
180~150 |
2.5-5 |
2.5~5 |
100/120 |
150~125 |
3-6 |
3~6 |
120/140 |
125~106 |
4-8 |
4~8 |
140/170 |
106~90 |
5-10 |
5~10 |
170/200 |
90~75 |
6-12 |
6~12 |
200/230 |
75~63 |
8-12 |
8~12 |
230/270 |
63~53 |
10-20 |
10~20 |
270/325 |
53~45 |
12-22 |
12~22 |
325/400 |
45~38 |
20-30 |
20~30 |
Wider range |
22-36 |
22~36 |
30/40 |
600~425 |
36-54 |
36~54 |
40/50 |
425~300 |
|
|
60/80 |
250~180 |
|
|
|