Mean diameter of abrasives F4-F2000
Normally abrasives includes fused alumina(white fused alumina,brown fused alumina,pink fused alumina and black fused alumina) and silicon carbide(black silicon carbide and green silicon carbide).
About sizes,the abrasives have the same standards,mainly JIS Standard (JIS#4-JIS#8000)and Fepa Standard(F4-F2000).
Mean diameter of abrasives FEPA Standard(F4-F2000) is as follows:
| Macrogrits | Microgrits | |||
| Grit designation | Mean Diameter in µm | Grit designation | Mean grain size ds50-value in μm | |
| F4 | 4890 | F230 | 53.0±3.0 | |
| F5 | 4125 | F240 | 44.5±2.0 | |
| F6 | 3460 | F280 | 36.5±1.5 | |
| F7 | 2900 | F320 | 29.2±1.5 | |
| F8 | 2460 | F360 | 22.8±1.5 | |
| F10 | 2085 | F400 | 17.3±1.0 | |
| F12 | 1765 | F500 | 12.8±1.0 | |
| F14 | 1470 | F600 | 9.3±1.0 | |
| F16 | 1230 | F800 | 6.5±1.0 | |
| F20 | 1040 | F1000 | 4.5±0.8 | |
| F22 | 885 | F1200 | 3.0±0.5 | |
| F24 | 745 | F1500 | 2.0±0.4 | |
| F30 | 625 | F2000 | 1.2±0.3 | |
| F36 | 525 | |||
| F40 | 438 | |||
| F46 | 370 | |||
| F54 | 310 | |||
| F60 | 260 | |||
| F70 | 218 | |||
| F80 | 185 | |||
| F90 | 154 | |||
| F100 | 129 | |||
| F120 | 109 | |||
| F150 | 82 | |||
| F180 | 69 | |||
| F220 | 58 | |||
