More speed. For every type of wire. With blac.
blac technology: wire coating redefined
For more than four decades, we have been shaping the development of wire EDM and setting standards in precision and performance. Our innovations have continuously advanced the technology, making processes more reliable and productive for customers worldwide.
With blac technology (bedra lattice amplified coating), we are continuing this success story and raising the bar once again. This pioneering coating represents a new milestone in spark erosion. It not only enhances the cutting process but also ensures greater productivity, efficiency, and consistency – all without the need to adapt existing cutting technologies.
By combining decades of expertise with cutting-edge material science, blac technology empowers manufacturers to achieve superior results, reduce downtime, and optimize their processes for the future.
Innovation with system: blac technology
- Technology leap for maximum efficiency: blac combines a microstructured surface with lattice embedded, semiconducting materials. The result: each spark discharge is coupled into the workpiece more efficiently, allowing a larger portion of the available energy to be converted into spark erosion removal.
- More performance – without compromise: Users benefit from significantly higher cutting performance – both in the main cut and in the first three trim cuts – while maintaining the usual high level of process reliability. In addition, blac contributes to energy efficiency in production.
- New possibilities for various applications: Thanks to precise bedra engineering, blac can be applied to different product categories.
Sustainability as a driver of innovation
In addition to productivity, energy efficiency is a key aspect of blac technology. By making better use of spark discharges, users consume noticeably less electricity per manufactured workpiece – a tangible contribution to CO2 reduction and sustainability strategies in industrial manufacturing.
Dr. Tobias Nöthe (CTO):
“With the blac technology, we’re delivering not just a new coating generation but a technological statement for greater production efficiency. Anyone who wants to future-proof its manufacturing cannot ignore this technology.”
Who should use blac technology?
- High-performance EDM machine users aiming for maximum throughput and energy efficiency
- Manufacturing companies seeking to secure technological leadership
- Operators looking for speed and precision without compromising quality
topas® blac G & blacspark® H – first EDM wires with blac technology
With the launch of topas® blac G and blacspark® H, bedra introduces the first product innovations based on our groundbreaking blac technology. Both products are designed to translate the advantages of the new coating into measurable benefits in everyday use.
topas® blac G – productivity meets precision
Developed for high-precision applications, topas® blac G sets new standards in surface quality and performance.
- New wire electrode with blac technology for maximum precision and surface quality
- Up to 15% higher cutting speeds compared to conventional wires in this segment (A, G, and AH wires)
- Achieves maximum precision and surface quality (Ra < 0.10 µm)
- Suitable technologies available on all modern AgieCharmilles series
Discover topas® blac G now
blacspark® H – efficiency redefined
blacspark® H takes EDM efficiency to the next level. The unique reconstituted layer structure unites a finely microstructured surface with uniformly embedded semiconductor particles.
- New wire electrode with blac technology in a hard version for maximum cutting performance in standard applications
- Up to 20% cutting performance compared to conventional gamma-phase wires
- Suitable for up to 3 cuts (Ra ~0.50 µm)
- Maximum energy efficiency through optimal use of generator power
Together, topas® blac G and blacspark® H mark the beginning of a new era in EDM performance – merging decades of bedra expertise with the pioneering power of blac technology.
topas® blac G technical data
| Core | CuZn37 |
|---|---|
| Coating | blac |
| Color | gold-bronze |
| Tensile strength | 900 MPa / 130,000 PSI |
| Elongation | >1% |
| Diameter | 0,20 / 0,25 / 0,30 mm |
| Spool types | bedra8, bedra16, K250, P10, P15 |
blacspark® H technical data
| Core | CuZn37 |
|---|---|
| Coating | blac |
| Color | Chestnut brown |
| Tensile strength | 850 MPa / 123,300 PSI |
| Elongation | >1% |
| Diameter | 0.25 / 0.30 mm |
| Spool types | K160, K200, P10, P15 |
blac technology flyer
You will find all the information about blac technology summarized in our flyer:
- blac technology flyer en
Berkenhoff GmbH (headquarters)
- Kinzenbach plant
- Berkenhoffstrasse 14
- 35452 Heuchelheim
- Germany
- +49 641 601 0
- +49 641 601 222
- info(at)bedra.com
Berkenhoff GmbH
- Merkenbach plant
- Rehmühle 1
- 35745 Herborn
- Germany
- +49 2772 5002 0
- +49 2772 5002 155
- info(at)bedra.com
bedra Vietnam Alloy Material Co., Ltd
- Lot CN-06, Hoa Phu Industrial Park,
Mai Dinh Commune,
Hiep Hoa District, Bắc Ninh Province,
Vietnam
- +84 2043900104
- +84 2043900110
- info-asia(at)bedra.com
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