Grit Table / film / Diamond lapping film

Product, maker figures

Diamond lapping film

Film

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

5030201053210.50.3

coarserfiner

inkmeasured or standardmaker figureour estimate

shapeknown distributionpoint, spread unknown

30 micronMaker-published

30 µm

Monocrystalline diamond on polyester.

spread not published · reference scale about #400

15 micronMaker-published

15 µm

spread not published · reference scale about #760

9 micronMaker-published

9 µm

spread not published · reference scale about #1300

6 micronMaker-published

6 µm

spread not published · reference scale about #2200

3 micronMaker-published

3 µm

spread not published · reference scale about #4000

1 micronMaker-published

1 µm

spread not published · reference scale about #8850

0.5 micronMaker-published

0.5 µm

spread not published · reference scale about #13050

0.1 micronMaker-published

0.1 µm

Fine end of 3M's stated diamond film range.

spread not published · reference scale about #31500

80 micronMaker-published

80 µm

Generic multi-brand diamond film ladder (AngstromLap/XYT, Jende).

spread not published · reference scale about #180

60 micronMaker-published

60 µm

spread not published · reference scale about #230

45 micronMaker-published

45 µm

spread not published · reference scale about #290