Grit Table / sandpaper / Norton Norax engineered belts (X-grade)
Product, maker figures
Norton Norax engineered belts (X-grade)
Coated abrasive
The maker publishes these figures. A single value per grade, no distribution given, so each is drawn as a point.
Each grade below shows its size in microns, its spread (the published distribution, where a maker or standard gives one; most makers publish none), and where that size lands on the reference scale , a shared yardstick for reading grit numbers across makers.
Particle size microns, log
100 50 30 20 10 5
coarser finer
ink
shape
X4 Maker-published
Maker micron (X-number = micron).
spread not published · reference scale about #3000
X16 Maker-published
Maker micron.
spread not published · reference scale about #720
X22 Maker-published
Maker micron.
spread not published · reference scale about #550
X30 Maker-published
Maker micron.
spread not published · reference scale about #400
X45 Maker-published
Maker micron.
spread not published · reference scale about #290
X65 Maker-published
Maker micron.
spread not published · reference scale about #210
X100 Maker-published
Maker micron.
spread not published · reference scale about #150
This is reference, not a recommendation. Particle size is defined by the abrasive grading standards (ISO 8486, ISO 6344, JIS R6001, ANSI B74, FEPA); the full references are listed and linked here . The data is free to use under CC BY 4.0 ; please credit Zen-Wu Toolworks.