Units for Measuring Particle Size of Diamond Abrasive Powder

Common Units for Measuring Diamond Abrasive Powder

There are several units commonly used for measuring particle sizes of diamond abrasive powder. And here comes the most widely used ones:

  1. Grit: Grit is a unit of measurement used specially in the context of abrasive materials. It represents the fineness or coarseness of the abrasive particles like diamond. Grit sizes are typically standardized based on the number if particles that fit within a particular sieve size. In the ANSI (American National Standards Institute) standard, diamond abrasive powder grit size are typically indicated using mesh sizes.Mesh size indicates the number of openings per linear inch in a sieve through which the diamond particles would pass. A larger mesh number corresponds to a smaller particle size and a finer grit.
  2. Mesh: Mesh is a unit of measurement used to determine particle size distribution based on the number of openings per linear inch in a sieve or screen. For example, a mesh size of 40 means there are 40 openings per liner inch.It is quite common in diamond abrasive powder size discription both in China and the US standards.
  3. Micrometer (μm)or Micron: the micrometer is a unit of length equal to one millionth of a meter. It is frequently used to express particle sizes, especially in scientific and engineering applications.

Choose the right diamond grit is important to achieve your final purpose. Coarse grits arechosen for material cutting, removal and shaping. Medium grits are  versatile and useful for a variety of tasks. Fine grits are used for achieving a smoother finish and preparing surfaces for polishing or honing. And very fine grits are for final finishing, polishing, and achieving a high-gloss surface. So it is quite important for understand these units for expressing particle size and know well how to convert them.

How to convert these units to know the exact sizes of particles of diamond abrasive powder ?

Please refer to the following chart:

CHART I

CHINA GB6406.1 INTERNATIONAL ISO 6016 79 EUROPE FEPA U.S.A. ANSI JAPAN JIS GERMANY DIN
GRIT No. Size Ranges            (μm) GRIT No. Size Ranges      (μm) GRIT No. Size Ranges      (μm) GRIT No. Size Ranges        (μm) GRIT No. Size Ranges         (μm) GRIT No. Size Ranges       (μm)
16/18 1180/1000 1181 1180/1000 D1181 1180/1000 16/18 1180/1000
18/20 1000/850 1001 1000/850 D1001 1000/850 18/20 1000/850
20/25 850/710 851 850/710 D851 850/710 20/25 850/710
25/30 710/600 711 710/600 D711 710/600 25/30 710/600 30/36 710/590
30/35 600/500 601 600/500 D601 600/500 30/35 600/500 36/40 590/500 D550 630/500
35/40 500/425 501 500/425 D501 500/425 35/40 500/425 D450 500/400
40/45 425/355 426 425/355 D426 425/355 40/45 425/355 40/46 420/350 D350 400/315
45/50 355/300 356 355/300 D356 355/300 45/50 355/300 46/54
50/60 300/250 301 300/250 D301 300/250 50/60 300/250 54/60 290/250 D280 315/250
60/70 250/212 251 250/212 D251 250/212 60/70 250/212 60/70 250/210 D220 250/200
70/80 212/180 213 212/180 D213 212/180 70/80 212/180 70/80 210/177
80/100 180/150 181 180/150 D181 180/150 80/100 180/150 80/90 D180 200/160
100/120 150/125 151 150/125 D151 150/125 100/120 150/125 90/100 149/125 D140 160/125
120/140 125/106 126 125/106 D126 125/106 120/140 125/106 100/120 125/105 D110 125/10
140/170 106/90 107 106/90 D107 106/90 140/170 106/90 120/150 105/74 D90 100/80
170/200 90/75 91 90/75 D91 90/75 170/200 90/75
200/230 75/63 76 75/63 D76 75/63 200/230 75/63 150/220 88/63 D65 80/63
230/270 63/53 64 63/53 D64 63/53 230/270 63/53 220/240 D55 63/50
270/325 53/45 54 53/45 D54 53/45 270/325 53/45 240/280 53/44 D45 50/40
325/400 45/38 46 45/38 D46 45/38 325/400 45/38 280/320 44/37

 

CHART II

MICRON DIAMOND ABRASIVE POWDER PARTICLE SIZE
China GB International partical size (μm) Japan Size D50 (μm)
W0.25 0-0.25 60000 0.11-0.20
W0.5 0-0.5 30000 0.20-0.30
W1- 0-1 20000 0.50-0.60
W1 0.5-1 15000 0.60-0.80
W1.5- 0-2 13000 0.80-1.00
W1.5 1-2 12000 1.10-1.30
W2.5- 1-3- 10000 1.60-1.70
W2.5 1-3 8000 1.70-1.90
W2.5+ 1-3+ 7000 1.90-2.10
W3- 2-3 6500 2.20-2.60
W3 2-4 6000 2.60-3.00
W3.5 2-5 5000 3.10-3.40
W5- 3-5 4000 3.50-4.20
W5 4-6 3500 4.40-5.00
W7- 4-8 3000 5.00-6.00
W7 4-8+ 2500 6.10-6.50
W10- 5-10 2000 6.50-7.30
W10 6-12- 1800 7.30-8.30
W10+ 6-12 1500 8.30-9.00
W14- 8-12 1500 9.10-10.50
W14 8-16 1300 10.0-12.0
W20- 10-20 1200 12.5-15.0
W20 12-22 1000 15-17
W20+ 15-25 800 18-20
W28- 20-30- 700 20-23
W28 20-30 600 23-26
W28+ 20-40 500 26-29
W40- 30-40- 450 29-32
W40 30-40 400 32-36
W40+ 35-45 350 37-41
W50- 40-50 320 41-45
W50 40-60 300 45-50

 

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