Diamond/CBN Grit/Grain
Conversion Tables
We can advise which grit sizes of diamond or CBN are recommended for optimum performance according to each application. Please see grit size table below.
| DIAMOND AND CBN SUPERABRASIVES | ||
| GRIT SIZE CONVERSION TABLE | ||
| BS5851 1st SYSTEM SINGLE GRAIN CODES (FEPA) | BS5851 2nd SYSTEM US-STANDARD ASTM-E-11-70 | BS1987 |
| 1181 | 16/18 | 14/16 |
| 1001 | 18/20 | 16/18 |
| 851 | 20/25 | 18/22 |
| 711 | 25/30 | 22/25 |
| 601 | 30/35 | 25/30 |
| 501 | 35/40 | 30/36 |
| 426 | 40/45 | 36/44 |
| 356 | 45/50 | 44/52 |
| 301 | 50/60 | 52/60 |
| 251 | 60/70 | 60/72 |
| 213 | 70/80 | 72/85 |
| 181 | 80/100 | 85/100 |
| 151 | 100/120 | 100/120 |
| 126 | 120/140 | 120/150 |
| 107 | 140/170 | 150/170 |
| 91 | 170/200 | 170/200 |
| 76 | 200/230 | 200/240 |
| 64 | 230/270 | 240/300 |
| 54 | 270/325 | 300/350 |
| 46 | 325/400 | 350/400 |
