Diamond paste

Diamond pastes are used for the finishing and polishing of ferrous and nonferrous metals, steels and semiconductors, alloyed steels, cast irons, ceramics, metal ceramics, carbide, sapphire, glass, semiconductors, and drawing dies.

 

Diamond pastes act on the workpiece surface chemically and mechanically. They form  fine-dispersion emulsions that allow for a smoother distribution of diamonds over the workpiece surface. The paste also contains active surface agents, which make washing easier and help to remove slightly  flammable liquids, chips and slag generated by the lapping process.

 

Pastes are produced with normal (N), higher (H) and extra-high concentration (E), depending on the volume content of diamonds and their grit size.

 

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

 

Volume content of diamond powder in diamond pastes.

Diamond size

content of diamond in pastes (carat weight) in 1 kg.

N

H

E

60/40

400

1000

2000

40/28

400

1000

2000

28/20

300

750

1500

20/14

300

750

1500

14/10

300

750

1500

10/7

200

500

1000

7/5

200

500

1000

5/3

200

500

1000

3/2

100

250

500

2/1

100

250

500

1/0

100

250

500

0,5/0

100

250

500

 

Depending on grit size, pastes can be used for different finishes:

Diamond powder grit sizes Surface rough less Ra µm Operation
Before After
D126-D54 Rough finishing
M63-M40 0,4-0,2 0,195-0,155
M25-M16 0,16-0,1 0,12-0,075 Semi- finishing
M10-M4 0,08 – 0,05 0,06 – 0,038 Fine finishing
M2.5-M1 0,04 – 0,025 0,03 – 0,02 Preliminary polishing
1/0,5-0,1/0 Polishing

 

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

 

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