Discs
Pro
Grit · 40
Festool Granat 5-Inch Disc, 40 Grit (25-pack)
Pyramid grain that sharpens itself. Opens the surface, then steps back.
FEPA P-grade · Converted
P40 in CAMI grit and microns.
P40 paper averages about 425 µm on the FEPA table. On the US CAMI scale that is about CAMI 40. A sheet printed plain "40" is about 425 µm, close enough that the P barely matters at this grade.
- Avg. particle
- ~425 µm
- FEPA table
- Nearest CAMI
- 40
- by particle size
- Plain "40"
- ~425 µm
- CAMI 40 ≈ P40
- 3M Trizact
- ·
- no A-grade paired by 3M
What P40 is for
Stripping paint and flattening rough stock. Floor sanders start here.
- Festool Granat P40Stripping and heavy leveling; usually on a Rotex.Check price →
Either side of P40
The neighborhood.
At this grade
Paper we link at P40.
Questions people ask
What is P40 in CAMI grit?
About 40. P40 averages 425 microns on the FEPA table and CAMI 40 averages 425, so the scratch is close to the same.
How many microns is P40 sandpaper?
About 425 microns average particle diameter, per the FEPA P-grade table (ISO 6344).
Is P40 the same as 40 grit?
Close enough to treat as the same. P40 averages 425 microns and CAMI 40 (a bare "40" on US paper) averages 425.
Convert any other grade, from CAMI, microns or a Trizact A-number, on the grit converter.
Sizes are average particle diameters from the published FEPA (ISO 6344) and CAMI (ANSI B74.12/B74.18) tables. "Nearest" means within 10%; otherwise both neighbors are shown. Trizact pairings are 3M's own. Sources: Wikipedia, "Sandpaper" grit table (rev. 1127917881); Klingspor coated abrasives grit chart.