Form and Classification of diamonds

 

Classification of Diamond according to Bond Type

 

Bond type Diamond Type Grit size range, μm
Resin Diamond grain: АС4; АС5С; АС6
Micropowder: АСН		 200/160 to 50/40
60/40 to 5/3
Metal Diamond grain: АС6; АС15; АС20; АС32; АС50; АС65
Micropowder: АСН		 250/200 to 50/40
400/315 to 50/40
60/40 to 5/3
Electroplated Diamond grain: АС15-Н; АС20-Н; АС32-Н; АС50-Н; АС65-Н
Micropowders: АСН-Н		 630/500 to 50/40
60/40 to 10/7

 

 

Conversion of Ukrainian Size Standards (DSTU 329295) to International Size Standards and their Applications by Operation

 

 Type of Operation Ukrainian Standard
DSTU 3292 µm		 ISO 565
International Standard, µm		 U.S. Standard
ANSI В 74		 FEPA
International Standard
         
 Rough Grinding
400/315
425/355
40/45
D426
315/250
300/250
50/60
D301
250/200
250/212
60/70
D251
200/160
212/180
70/80
D213
160/125
180/150
80/100
D181
         
 Finish Grinding  
150/125
100/120
D151
125/100
125/106
120/140
D126
100/80
106/90
140/170
D107
         
 Fine Grinding
80/63
90/75
170/200
D91
 
75/63
200/230
D76
63/50
63/53
230/270
D64
50/40
53/45
270/325
D54
 
45/38
325/400
D46
         
 Fine grinding,Polishing 60/40  
500
М63
40/28  
550
М40
28/20  
650
М25
20/14  
1100
М20
14/10  
1500
М16
10/7  
1700
М10
7/5  
3000
М6.3
5/3  
4000
М4.0