Product lines
Every brand counts differently.
A 3M number, a Festool P-grade, a Trizact A-code and a Scotch-Brite color are four different languages for the same question: how big is the grain. Each page below translates one line into CAMI, P-grade and microns, then names the SKU at each step.
3M
3M Wetordry
Silicon carbide on waterproof paper. The US numbering that quietly runs finer than the P-grade with the same digits.
Bare grit numbers (CAMI-style marking)
3M
3M Trizact
A-grades decoded by 3M’s own table, A5 = P3000, plus what P5000 is for.
3M A-grade (not microns); auto discs in P-grade
3M
Scotch-Brite hand pads
Color is a grade, not a grit. 3M’s own names and minerals for maroon, gray, white and tan.
3M grade names (Medium → Super Fine)
Norton (Saint-Gobain)
Norton 3X
P-graded, heat-treated aluminum oxide, open coat. Every grade from P60 to P400 in microns.
FEPA P-grade
Festool
Festool Granat
Ceramic plus aluminum oxide, P-graded, anti-clog. With the Rotex vs ETS question answered.
FEPA P-grade
Mirka
Mirka Abranet
Abrasive on a polyamide net, so the dust leaves through the whole disc. P-graded.
FEPA P-grade
The master table
CAMI vs P-grade vs microns →
The two grading standards side by side, from 40 grit to mirror.