FEPA-ABRASIVES

Aluminium Oxide & Silicon Carbide Grains
FEPA-standard 43-1:2006: Grains of fused aluminium oxide, silicon carbide and other abrasive materials for coated abrasives Macrogrits P 12 to P 220

FEPA-standard 43-2:2006: Grains of fused aluminium oxide, silicon carbide and other abrasive materials for coated abrasives Microgrits P 240 to P 2500

Notes:

The mean diameters of macrogrits shown in the table are estimated and for information only, the FEPA-Standard defines them as a range and not a single value.

MACROGRITS		MICROGRITS
Grit designation	Mean Diameter in µm	Grit designation	Mean grain size d_s50-value in μm
P 12	1815	P 240	58.5 ± 2
P 16	1324	P 280	52.2 ± 2
P 20	1000	P 320	46.2 ± 1.5
P 24	764	P 360	40.5 ± 1.5
P 30	642	P 400	35.0 ± 1.5
P 36	538	P 500	30.2 ±1.5
P 40	425	P 600	25.8 ± 1
P 50	336	P 800	21.8 ± 1
P 60	269	P 1000	18.3 ± 1
P 80	201	P 1200	15.3 ± 1
P 100	162	P 1500	12.6 ± 1
P 120	125	P 2000	10.3 ± 0.8
P 150	100	P 2500	8.4 ± 0.5
P 180	82
P 220	68

The particle size distribution of macrogrits is determined by sieving, while the microgrits have been measured by sedimentation (US-Sedimentometer).

More information can be found in the FEPA-Standards 43-1:2006 ; 43-2:2006 and in ISO 6344.

Mastergrits P 12-P 220 and Mastergrits P 1500-P 2500 can be obtained from:

Staatliche Materialprüfungsanstalt Darmstadt
Dr. Ing. P. Hof
Grafenstraße 2
64283 Darmstadt
Germany
Tel: +49-6151-16 65 82
Fax: +49-6151-16 60 46
E-mail: hof@mpa-ifw.tu-darmstadt.de

FEPA 20, Avenue Reille 75014 PARIS FRANCE
Phone: [33](0)1 45 81 25 90 Fax:[33](0)1 45 81 62 94