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.
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) | |||
---|---|---|---|---|---|---|
narrow | wide | narrow | wide | narrow | wide | |
D426 | D427 | B426 B356 | B427 | 40/45 45/50 | 40/50 | 425 - 355 355 - 300 |
D301 | B301 | 50/60 | 300 - 250 | |||
D251 D213 | D252 | B251 B213 | B252 | 60/70 70/80 | 250 - 212 212 - 180 | |
D181 | B181 | 80/100 | 180 - 150 | |||
D151 | B151 | 100/120 | 150 - 125 | |||
D126 | B126 | 120/140 | 125 - 106 | |||
D107 | B107 | 140/170 | 106 - 90 | |||
D91 | B91 | 170/200 | 90 - 75 | |||
D76 | B76 | 200/230 | 75 - 63 | |||
D64 | B64 | 230/270 | 63 - 53 | |||
D54 | B54 | 270/325 | 53 - 45 | |||
D46 | B46 | 325/400 | 45 - 38 | |||
D35 | 400/500 | 40 - 32 | ||||
D30 | B30 | 400/600 | 40 - 25 | |||
D25 | 500/600 | 32 - 25 | ||||
D20 | 25 - 20 | |||||
D15 | B15 | 20 - 10 | ||||
D10 | 12 - 6 | |||||
D7 | 10 - 5 | |||||
D3 | 4 - 2 | |||||
D1 | 2 - 1 |