Quackenbush Company, Inc.

PARTICLE SIZE CONVERSION CHART

U.S. MESH
 INCHES
 MICRONS
 MILLIMETERS
3
0.265
6730
6.73
3-1/2
 0.223
 5660
 5.66
4
 0.187
 4760
 4.76
5
0.157
4000
4.00
6
 1.132
 3360
 3.36
7
 0.111
 2830
 2.83
8
 0.0937
 2380
 2.38
10
 0.0787
 2000
 2.00
12
 0.0661
 1680
 1.68
14
 0.0555
 1410
 1.41
16
 0.0469
 1190
 1.19
18
 0.0394
 1000
 1.00
20
 0.0331
 841
 0.84
25
 0.0280
 707
 0.71
30
 0.0232
 595
 0.59
35
 0.0197
 500
 0.50
40
 0.0165
 420
 0.42
45
 0.0138
 354
 0.35
50
 0.0117
 297
 0.297
60
 0.0098
 250
 0.250
70
 0.0083
 210
 0.210
80
 0.0070
 177
 0.177
100
 0.0059
 149
 0.149
120
 0.0049
 125
 0.125
140
 0.0041
 105
 0.105
170
 0.0035
 88
 0.088
200
 0.0029
 74
 0.074
230
 0.0024
 63
 0.063
270
 0.0021
 53
 0.053
325
 0.0017
 44
 0.044
400
 0.0015
 37
 0.037


COMPARATIVE FINENESS DATA

HEGMAN
(NSI) SCALE
PRODUCTION
CLUB SCALE
DEPTH OF
GROOVES
(NPIRI)
DEPTH OF
GROOVES
(MILS)
DEPTH OF
GROOVES
(MICRONS)
CLOSEST U.S.
MESH SIZE
0
0.00
 40
 1.00
100.0 
140 
1
1.25
 35
 3.50
 87.5
 170
3
3.75
 25
 2.50
 62.5
 230
4
5.00
 20
 2.00
 50.0
 325
5
6.25
 15
 1.50
 37.5
 ----
6
7.5
 10
 1.00
 25.0
 400
7
8.75
 5
 0.50
 12.5
 ----
7-1/2
 ----
 2.5
 0.25
 6.25
 ----
8
10.00
 0
 0.00
 0.0
 ----

Grinding Media of All Types

Glass Beads, Zirconium Silicate Beads, Silica Sand, Steel Shot,
Chrome Steel Balls, Aluminum Oxide Balls and Rods

Quackenbush Co, Inc.
6711 Sands Road
Crystal Lake, IL  60014
Ph:  815-479-8900       Fax  815-479-8890
E-Mail:  quackco@mc.net

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