Grit Sizes

For optimum stock removal capability it is generally of advantage to use the largest grit size allowing surface quality requirements.

AUDIA Diamond and CBN grit sizes conform to the FEPA-Standard. This standard prescribes the most precise test sieve specifications for abrasive grits under consideration of the latest technological developments.

Standard grit sizes für diamond and CBN

AUDIA
diamond
FEPA standard
AUDIA
CBN
FEPA-standard
US-standard

ASTM-E-11-70 (US Mesh)
Nominal ISO sieve aperture range according to ISO R 565-72 (µm)
narrowwidenarrowwidenarrowwide
D426D427B426
B356
B42740/45
45/50
40/50425 - 355
355 - 300
D301B30150/60300 - 250
D251
D213
D252B251
B213
B25260/70
70/80
250 - 212
212 - 180
D181B18180/100180 - 150
D151B151100/120150 - 125
D126B126120/140125 - 106
D107 B107140/170106 - 90
D91B91170/20090 - 75
D76B76200/23075 - 63
D64B64230/27063 - 53
D54B54270/32553 - 45
D46B46325/40045 - 38
D35400/50040 - 32
D30B30400/60040 - 25
D25500/60032 - 25
D2025 - 20
D15B1520 - 10
D1012 - 6
D710 - 5
D3 4 - 2
D12 - 1