Abrasive Reference Chart for Coated Abrasive, Diamond and Cubic Boron NitrideAbrasive Reference Overview - Two primary standards exist for classifying the grit size of abrasives. In the U.S., the CAMI (Coated Abrasives Manufacturing Institute) standard is used; Europe uses the FEPA (Federation of European Producers of Abrasives) standard. Japan uses the JIS (Japanese Industrial Standard), which is equivalent to the FEPA standard. FEPA graded abrasives can be easily distinguished by the letter "P" in front of the grit number, such as P240. There are sizing differences between the CAMI and FEPA standards, so the two standards are not universal. The following chart compares the CAMI and FEPA "P" abrasive designations with the average grit size in micrometres (µm).
The following chart compares the FEPA, U.S. Standard and British Standard grit size designations for Diamond and Cubic Boron Nitride (cBN). Diamond grits are prefixed with a "D" and CBN with a "B". Abrasive Reference - Narrow Range Grades
Abrasive Reference - Wide Range Grades
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