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Setting new standards for smooth surfaces: - Bosch

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Grit sizes Grit sizes<br />

Grit (P) Average grit dia.<br />

µm -1 /1000 mm<br />

FEPA Standard*<br />

25.4 mm<br />

Grit size<br />

P16 16 mesh openings per<br />

1 linear inch<br />

The grit size is denoted by a grit number. The grit<br />

number corresponds to the number of mesh openings<br />

per linear inch, 1 inch = 25.4 mm.<br />

* www.fepa-abrasives.org<br />

Macro grits Micro grits<br />

Grit (P) Average grit dia.<br />

µm -1 /1000 mm<br />

Grit (P) Average grit dia.<br />

µm -1 /1000 mm<br />

Grit (P) Average grit dia.<br />

µm -1 /1000 mm<br />

16 1324 60 269 240 58.5 600 25.6<br />

20 1000 80 201 280 52.2 800 21.8<br />

24 764 100 162 320 46.2 1000 18.3<br />

30 642 120 125 360 40.5 1200 15.3<br />

36 538 150 100 400 35 1500 12.6<br />

40 425 180 82 500 30.2 2000 10.3<br />

50 336 220 68 2500 8.4<br />

25.4 mm (1")<br />

Sanding and Polishing I 21

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