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Comparison of Grit Size

Grit No. Nominal Size Range (um)
China GB2477- 83
JIS R6001-1987
ANSI (74)
ISO(86) FEPA(84)
4 5600 ~ 4750

5600 ~ 4750 5600 ~ 4750
5 4750 ~ 4000

    

4750 ~ 4000 4750 ~ 4000
6 4000 ~ 3350

4000 ~ 3360 4000 ~ 3350
7 3350 ~ 2800

3360 ~ 2830 3350 ~ 2800
8 2800 ~ 2360 2800 ~ 2360 2830 ~ 2380 2800 ~ 2360
10 2360 ~ 2000 2360 ~ 2000 2380 ~ 2000 2360 ~ 2000
12 2000 ~ 1700 2000 ~ 2000 2000 ~ 1680 2000 ~ 1700
14 1700 ~ 1400 1700 ~ 1400 1680 ~ 1410 1700 ~ 1400
16 1400 ~ 1180 1400 ~ 1180 1410 ~ 1190 1400 ~ 1180
20 1180 ~ 1000 1180 ~1000 1190 ~ 1000 1180 ~ 1000
22 1000 ~ 850 ------- ------ 1000 ~ 850
24 850 ~ 710 850 ~ 710 841 ~ 707 850 ~ 710
30 710 ~ 600 710 ~ 600 707 ~ 595 710 ~ 600
36 600 ~ 500 600 ~ 500 595 ~ 500 600 ~ 500
40 500 ~ 425 ------- ------- 500 ~ 425
46 425 ~ 355 425 ~ 355 420 ~ 354 425 ~ 355
54 355 ~ 300 355 ~ 300 354 ~ 297 355 ~ 300
60 300 ~ 250 300 ~ 250 297 ~ 250 300 ~ 250
70 250 ~ 212 250 ~ 212 250 ~ 210 250 ~ 212
80 212 ~ 180 212 ~ 180 210 ~ 177 212 ~ 180
90 180 ~ 150 180 ~ 150 177 ~ 149 180 ~ 150
100 150 ~ 125 150 ~ 125 149 ~ 125 150 ~ 125
120 125 ~ 106 125 ~ 106 125 ~ 105 125 ~ 106
150 106 ~ 75 106 ~ 75 105 ~ 74 106 ~ 75
180 90 ~ 63 90 ~ 63 88 ~ 63 90 ~ 63
220 75 ~ 53 75 ~ 53 74 ~ 53 75 ~ 53
240 75 ~ 53 --------- 74 ~ 53

         -------

Compariosn of Mircron Powers

China GB 2477-83

JIS

ANSI(77)

DIN(70)

FEPA(84)

ISO(77)

Grit No.

Norminal size range(µm)

Grit No.

ds50 value (µm)

Grit No.

ds50 value (µm)

Grit No.

ds50 value(µm)

Grit No.

ds50 value (µm)

grit No.

ds50 value (µm)

Standard werte der Mikro-F-Reihe

Sedigraph 5000D

240

60.04.0

P240

58.52.0

280

52.03.0

P280

52.22.0

W63

63 - 50

320

46.02.5

240

53.5 - 50

OS53

533.0

F230/53

533.0

50.03.0

P320

46.21.5

W50

50 - 40

360

40.02.0

OS45

44.52.0

F240/45

44.52.0

42.02.0

P360

40.51.5

400

34.02.0

280

44 - 40.5

P400

35.01.5

W40

40 - 28

500

28.02.0

320

36 - 32.5

OS37

36.51.5

F280/37

36.51.5

34.51.5

P500

30.21.5

600

24.01.5

360

28.8 - 25.8

OS29

29.21.5

F320/29

29.21.5

27.71.5

P600

25.81.0

W28

38 - 20

700

21.01.3

400

23.6 - 20.6

OS23

22.81.5

F360/23

22.81.5

21.61.5

P800

21.81.0

800

18.01.0

500

19.7 - 16.7

OS17

17.31.0

F400/17

17.31.0

16.51.0

P1000

18.31.0

W20

20 - 14

1000

15.51.0

600

16 - 13

OS13

12.81.0

F500/13

12.81.0

12.31.0

P1200

15.31.0

W14

14 - 10

1200

13.01.0

1500

10.51.0

800

12.3 - 9.8

OS9

9.31.0

F600/9

9.31.0

9.01.0

W10

10 - 7

2000

8.50.7

1000

9.3 - 6.8

W7

7 - 5

2500

7.00.7

OS7

6.51.0

F800/7

6.51.0

6.31.0

W5

5 - 3.5

3000

5.70.5

1200

6.5 - 4.5

OS5

4.50.8

F1000/5

4.50.8

4.50.8

OS3

3.10.5

F1200/3

3.10.5

3.10.5

for general purposes

for general purposes

for bonded abrasives

for bonded abrasives

for coated abrasives

Size Distribution of Grain F10-F240

Grit No.

The Coarsest Grains

Coarse Grains

Normal Grains

Mixed Grains

Fine Grains

Sieve No.

Above sieve
(weight % ) max

Sieve No.

Above Sieve

(weight % ) max

Sieve No.

Above Sieve

(weight % ) min.

Sieve No.

Above sieves
(weight % ) min.

Sieve No.

Under Sieve

(weight % ) max.

F10

6

0

8

20

10

45

10 12

70

14

3

F12

7

0

10

20

12

45

12 14

70

16

3

F14

8

0

12

20

14

45

14 16

70

18

3

F16

10

0

14

20

16

45

16 18

70

20

3

F20

12

0

16

20

18

45

18 20

70

25

3

F22

14

0

18

20

20

45

20 25

70

30

3

F24

16

0

20

25

25

45

25 30

65

35

3

F30

18

0

25

25

30

45

30 35

65

40

3

F36

20

0

30

25

35

45

35 40

65

45

3

F40

25

0

35

30

40

40

40 45

65

50

3

F46

30

0

40

30

45

40

45 50

65

60

3

F54

35

0

45

30

50

40

50 60

65

70

3

F60

40

0

50

30

60

40

60 70

65

80

3

F70

45

0

60

25

70

40

70 80

65

100

3

F80

50

0

70

25

80

40

80 100

65

120

3

F90

60

0

80

20

100

40

100 120

65

140

3

F100

70

0

100

20

120

40

120 140

65

200

3

F120

80

0

120

20

140

40

140 170

65

230

3

F150

100

0

140

15

170 200

40

170 200 230

65

325

3

F180

120

0

170

15

200 230

40

200 230 270

65

----
----

F220

140

0

200

15

230 270

40

230 270 325

60

----
----

F240

170

0

200

5

230 270

8

230 270 325

38

----
----

Physical Characteristics of Abrasives

Item
Brown Fused Aumina
White Fused Alumina
Black Silicon Carbide
Green silicon Carbide
Basic Mineral
-Al2O3
-Al2O3
-SiC
-SiC
Crystal System
Hexagonal
Hexagonal
Hexagonal
Hexagonal
Crystal Color
Brown
White
Black
Green
Density
>3.90g/cm³
>3.90g/cm³
>3.12g/cm³
>3.18g/cm³
Bulk Density
1.68-1.95g/cm³
1.75-1.95g/cm³
1.45-1.56g/cm³
1.45-1.56g/cm³
Mohs Hardness
9
9
9.15
9.15
Micro Hardness
2000-2200kg/cm²
2000-2300kg/cm²
3100-3280kg/cm²
3280-3400kg/cm²
Grinding Ability (Compared With Diamond as one)
0.10
0.12
0.25
0.28

Linear Expansion
Coefficient
(at 900c, in 10-6 /c )

7.6
8.3
4.4
4.6

Electrical Resistivity

1014-1016Wcm
1014-1016Wcm
3x105-3x107Wcm
3x105-3x107Wcm


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