| SYNTHETIC
DIAMONDS AND DIAMOND TOOLS
DIAMOND
GRINDING POWDERS
Standard
- DSTU 3292-95.
Mark - AC4, AC6.
Granularity - 250/200, 200/160,
160/125, 125/100, 100/80, 80/63, 63/50, 50/40
micron
|
|
|
|
AC4
50/40 |
AC4 125/100 |
AC6 125/100 |
Application:
-
AC4
(diamond grains presented by aggregates
and joints) manufacture of resin bonded
tools for machining of hard alloys, ceramics
and other hard-to-machine materials.
-
AC6
(diamond grains presented by single crystals
with enchanced surface, aggregates and joints)
manufacture of metal and resin bonded tools
for rough machining of hard alloys and non-metal
materials.
Diamond
powders can be Ni-coated to improve performance
of diamond tools.
Sub-sieve
size grains must meet the requirements mentioned
in the table below.
|
Granularity
|
Mesh
size |
|
Oversize
limit, less than 0,1% |
Coarse
tail, less than 15% |
Main
fraction, more than 70% |
Fines
tail, less than 2% |
|
250/200 |
315 |
200 |
200 |
160 |
|
200/160 |
250 |
200 |
160 |
125 |
|
160/125 |
200 |
160 |
125 |
100 |
|
125/100 |
160 |
125 |
100 |
80 |
|
100/80 |
125 |
100 |
80 |
63 |
|
80/63 |
100 |
80 |
63 |
50 |
|
63/50 |
80 |
63 |
50 |
40 |
|
50/40 |
63 |
50 |
40 |
- |
Designation
of diamond grinding powder's granularity according
to different standards:
| FEPA
standard |
US
standard, mesh |
Grain
size, micron |
Ukrainian
standard, micron |
D251 |
60/70 |
250/212 |
250/200 |
D213 |
70/80 |
212/180 |
200/160 |
D181 |
80/100 |
180/150 |
|
D151 |
100/120 |
150/125 |
160/125 |
D126 |
120/140 |
125/106 |
125/100 |
D107 |
140/170 |
106/90 |
100/80 |
D91 |
170/200 |
90/75 |
|
D76 |
200/230 |
75/63 |
80/63 |
D64 |
230/270 |
63/53 |
63/50 |
D54 |
270/325 |
53/45 |
50/40 |
|
D46 |
325/400 |
45/38 |
|
Example
of the order of diamond grinding powder AC6, granularity
100/80, Ni-coated
AC6
100/80 Ni55
Diamond
powders can be sieved in American mesh or European
FEPA standard.
Diamond
Micropowders.
Standard
DSTU 3292-95
Mark ACH
- synthetic diamond powder with high content of
main fraction and high abrasive ability.
Mark ACM - synthetic diamond
powder of normal abrasive ability.
Granularity:
ACH powder
60/40, 40/28, 28/20, 20/14, 14/10, 10/7, 7/5,
5/3 micron,
ACM powder 3/2, 2/1, 1/0,
0,5/0, 0,25/0 micron.
Application:
- manufacture
of diamond tools on resin and metal bonds;
- manufacture
of diamond tools by electrochemical method;
- manufacture
of diamond pastes and suspensions.
Diamond
micropowders of granularity from 14/10 to
60/40 micron can be Ni-coated to improve
performance of diamond tools and pastes. |
Designation
of diamond micropowders granularity according
to different standards
| FEPA
(nearest equivalent) |
U.S.
nominal micron size |
U.S.
mesh equivalent |
Grain
size, micron |
Ukrainian
standard, micron |
| |
1/4 |
100.000 |
0-1/2 |
0,3/0 |
| |
1/2 |
60.000 |
0-1 |
0,5/0 |
M
1.0 |
1 |
14.000 |
0-2 |
1/0 |
M
1.6 |
2 |
12.000 |
1-3 |
2/1 |
M
2.5 |
3 |
8.000 |
2-4 |
3/2 |
M
4.0 |
4 |
5.000 |
2-6 |
5/3 |
|
|
5 |
4.000 |
4-6 |
|
M
6.3 |
6 |
3.000 |
4-8 |
7/5 |
M
10 |
8
10 |
2.000
1.700 |
6-10
8-12 |
10/5
10/7 |
|
|
12 |
1.500 |
8-16 |
14/10 |
M
16 |
15
17 |
1.200
1.100 |
10-20
12-22 |
20/14 |
M
25 |
20 |
1.000 |
15-25 |
28/20 |
25 |
800 |
20-30 |
30 |
650 |
22-36 |
M
40 |
35 |
550 |
30-40 |
40/28 |
|
|
45
50 |
520
500 |
36-54
40-60 |
60/40 |
|
|
60
100 |
325/400
270/325 |
54-80
80-120 |
|
