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Grading Systems
Idntifying the size of the grit to be used is very important, especially considering the large variety of grades available.
The following table compares the ANSI (American National Standards Institute) norm B74.18-1984, FEPA "P" (European Federation of Abrasives Producers) and JIS (Japanese International Standard) regulation. These three standards are compared with the average size of the particles in microns and with a simplified grading pattern (that meet two or more grits in one value).
This chart shows the five basic types of operations with its corresponding grade: Grading Systems Table