Grit / Micron Size:
   

Applies   to products using abrasive grains held in a matrix or bonded to a   surface such as coated abrasives, MSL superabrasives, vitrified grinding   wheels, dressing sticks, honing stones or grit dressers. Grit sizes are   based on ANSI, FEPA, JIS or proprietary grading system   standards.  Grading system standards define a grit size through   specified upper and lower limits at certain points in the size distribution.
   

Grading / Grit System:

ANSI   - Bonded
   

American   or U.S.  grading or grit size standards for abrasive grains used in bonded abrasives   or grinding wheels.
   

FEPA   - F
   

European grading   or grit size standards for abrasive grains used in bonded abrasives or   grinding wheels.
   

JIS
   

Japanese   grading or grit size standards for abrasive grains.
   

Micron   Graded
   

Very   fine abrasive grain graded to micron size ranges usually based an average   particle size.
   

Specialty / Other
   

Other   unlisted, proprietary, or specialized grading or grit system.