TeknikTips
E Graphite grades
All Meusburger graphite grades are especially developed for EDM. This guarantees consistent quality and good machining properties.Q70
- Depending on the machinery used, a surface quality of VDI 27 (2.2 μmRa to VDI 24 (1.6 μmRa) can be reached
- Minor electrode wear
- Good surface finish
- Rapid EDM process
Q60
- For surface quality of VDI 22 (1.26 μmRa)
- Ideal for high-quality finishing
- For complex shapes
- Good surface finish and high material removal rate
Q40
For surface quality of VDI 20 (1.0 μmRa)
Complex electrodes with fine contours
Minor electrode wear and high material removal rate
For very demanding surface finish
Q70 | Q60 | Q40 | |
---|---|---|---|
Average grain size | 7 µm | 6 µm | 4 µm |
Attainable surface quality | VDI 27 (2.2 µm Ra) - VDI 24 (1.6 µm Ra) | VDI 22 (1.26 µm Ra) | VDI 20 (1.0 µm Ra) |
Density | 1,83 g/cm³ | 1,86 g/cm³ | 1,82 g/cm³ |
Electrical resistance | 12,5 µΩ/m | 12 µΩ/m | 16,5 µΩ/m |
Bending strength | 54 N/mm² | 65 N/mm² | 66 N/mm² |
Hardness | 62 Shore | 60 Shore | 72 Shore |