Artco Resin-bond diamond cup wheels

Grinding wheel

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 sizemicrons, log

10050302010

coarserfiner

inkmeasured or standardmaker figureour estimate

shapeknown distributionpoint, spread unknown

80 gritMaker-published

Artco

229 µm

Artco states .009 inch (~229 micron).

spread not published · reference scale about #70

100 gritMaker-published

Artco

152 µm

Artco states .006 inch (~152 micron).

spread not published · reference scale about #100

150 gritMaker-published

Artco

102 µm

Artco states .004 inch (~102 micron).

spread not published · reference scale about #140

220 gritMaker-published

Artco

64 µm

Artco states .0025 inch (~64 micron).

spread not published · reference scale about #220

320 gritMaker-published

Artco

30 µm

Artco states .0012 inch (~30 micron).

spread not published · reference scale about #400

600 gritMaker-published

Artco

13 µm

Artco states .0005 inch (~13 micron).

spread not published · reference scale about #870

800 gritMaker-published

Artco

7.6 µm

Artco states .0003 inch (~7.6 micron).

spread not published · reference scale about #1650