Unibrite Corporation                  Port Washington, N.Y. 11050

Phone: 631-582-2800                          Fax:  631-582-2820                   Email: info@unibrite .com

 Silicon Carbide, Aluminum Oxide, Alumina, Glass Beads, Vibratory Compounds

Since 1956

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            ANSI  Table 2                          Macro Grits

                                                    Size chart

 

Allowable limits for sizing of Aluminum oxide and silicon Carbide Abrasive grain for grinding wheel manufacture and general polishing purposes

Grit No.

Sieve through which 100% must pass

Control Sieve1

Max of oversize
on control sieve1

Min through control sieve and retained

Cumulative min through control sieve and retained

Max of 3% through sieve No.1

No.

Opening Inches

%

%

On Sieve
No.1

%

On Sieve
 No.1

4
5
6
7

5/16
.266
3.5
4

3.5
4
5
6

0.223
0.187
0.157
0.132

20
20
20
20

40
40
40
40

4
5
6
7

70
70
70
70

4 & 5
5 & 6
6 & 7
7 & 8

6
7
8
10

8
10
12
14
16

5
6
7
8
10

7
8
10
12
14

0.111
0.0937
0.0787
0.0661
0.0555

20
20
20
20
20

45
45
45
45
45

8
10
12
14
16

70
70
70
70
70

8 & 10
10 & 12
12 & 14
14 & 16
16 & 18

12
14
16
18
20

20
24
30
36
46

12
16
18
20
30

16
20
25
30
40

0.0469
0.0331
0.0278
0.0234
0.0165

20
25
25
25
30

45
45
45
45
40

18
25
30
35
45

70
65
65
65
65

18 & 20
25 & 30
30 & 35
35 & 40
45 & 50

25
35
40
45
60

54
60
70
80
90

35
40
45
50
60

45
50
60
70
80

0.0139
0.0117
0.0098
0.0083
0.0070

30
30
25
25
20

40
40
40
40
40

50
60
70
80
100

65
65
65
65
65

50 & 60
60 & 70
70 & 80
80 & 100
100 & 120

70
80
100
120
140

100
120
150
180
220

70
80
100
120
140

100
120
140
170
200

0.0059
0.0049
0.0041
0.0035
0.0029

 

20
20
15
15
15

40
40
40
40
40

120
140
200
200 & 230
230 & 270

65
65
65
65
65

 

120 & 140
140 & 170
200 & 230
200,230 & 270
230,270 & 325

200
230
325
  --
  --

 

240

 

170

200

0.0029

5

8

230 and 270

38

230, 270 and 325

  --

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. The sieves referred to are those of the U.S. Standard Sieve Series, described in table 1, which have been  certified to be in conformance with the   e         AGA master sieves. (Information on this sieve series can be obtained  from the AGA 1230 Keith Bldg, Cleveland, Ohio, 44115.)

Last modified: 12/23/09