Darmann Abrasive Products, Inc. designs, manufactures and markets fine grit bonded abrasive products. These include superfinishing, precision grinding and honing processes using diamond cup wheels and diamond grinding wheels to accomplish precision surface grinding.ISO 9001:2000 Registered

Precision Abrasive Tools

Grit Sizes

Superfinishing uses fine grit sized materials to achieve the desired finish.

The sizing of abrasive grains is determined by organizations such as the Federation of European Abrasive Products (FEPA), and the Japanese Industrial Standards Committee (JIS). Most superfinishing processes use conventional abrasives with grit sizes between 400 and 1200 grit on the FEPA scale. Some applications, such as miniature bearings, may require the use of sub-micron sized particles. Generally, the use of finer grit sizes will improve surface finishes. The table shown in this paragraph compares the nominal grain sizes of conventional abrasive particles using the FEPA and JIS standards.

 

Grain Sizes
FEPA JIS Micron
320 500 35
400 700 23
500 1000 18
600 1200 14
800 2000 8
1000 3000 5
1200 4000 3
1500 6000 1

Superabrasive applications which require heavier stock removal utilize larger grit sized abrasive grains. The sizing of larger abrasive grains is also determined by international standards organizations, and the table below shows a comparison of FEPA, mesh, and micron sizing for some common larger abrasive grains.

Grain Sizes
FEPA Mesh Micron
D426 40/50 426 µm
D356 45/50 356 µm
D301 50/60 301 µm
D251 60/70 251 µm
D213 70/80 213 µm
D181 80/100 181 µm
D151 100/120 151 µm
D126 120/140 126 µm
D107 140/170 107 µm
D91 170/200 91 µm
D76 200/230 76 µm
D64 230/270 64 µm
D54 270/325 54 µm
D46 325/400 46 µm

 

Darmann Abrasive Products, Inc.
100 Sterling Street
Clinton, MA 01510
Phone: 800-536-4544
Fax: 800-736-3839
Email: info@domain.com
Darmann Abrasive Products, Inc. designs, manufactures and markets fine grit bonded abrasive products. These include superfinishing, precision grinding and honing processes using diamond cup wheels and diamond grinding wheels to accomplish precision surface grinding. Sitemap - Resources

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