Revolutionizing brake disc machining: the future of precision grinding with innovative grinding wheels

The challenge of grinding hard-coated brake discs

The EURO 7 standard, expected to enter into force from 2026, represents the strictest exhaust and particulate emissions regulation of the European Union for motor vehicles. Compared with its predecessors, the new standard does not only target the reduction of exhaust emissions from the combustion engine, but for the first time also covers fine-particulate emissions from brakes and tires. This marks a decisive shift in regulation, since modern vehicles — electric vehicles in particular — reduce engine wear through regenerative braking, but still generate fine particulates through the abrasion of brake discs and pads.

With EHWA, you benefit from first-class expertise, the highest precision quality, economical grinding solutions, and tools tailored individually to your requirements.

EHWA HMF grinding tools for brake discs in all-wheel-drive vehicles

EHWA's HMF grinding tools were developed specifically for machining brake discs in all-wheel-drive (4WD) vehicles. With grit sizes from #170 to #325, the MJ and MS bonds, and concentrations from 80 to 130, they offer precision and flexibility for workpieces made of cast iron (FC, FCD).

Customer-specific adjustments such as dimensions and bond types ensure optimal results for different requirements. These tools stand out through efficiency, long service life, and excellent surface quality.

Workpieces

• Cast iron (FC & FCD)

Advantages

• Long tool life and cost savings
• Short machining time thanks to high grinding speed

Test results

• Surface roughness: Ry 1–4 µm
• Grinding pattern: cross pattern
• Tool life: 300,000–350,000 brake discs (over 6 months)

Test conditions

• Honing stone data: MB-HMF, 48 pieces/set, CBN140L100MH23
• Machine: DAISHO Grind Master V GMW-585/30IT2

EHWA Mevious wheel and stone – high-performance grinding wheel for EURO 7

The EHWA Mevious grinding wheel was developed specifically for machining brake discs that have received an SUS surface via laser cladding. By combining high wear resistance with excellent grinding performance, it offers a solution for demanding grinding processes.

What is laser cladding?

Laser cladding is a process in which a thin layer of metal — in this case stainless steel (SUS) — is applied to the surface of a component using a laser.

Why is laser cladding used?

• Wear protection – increases the durability of the brake component
• Corrosion protection – protects the brake disc from rust and external influences
• Material reinforcement – improves the mechanical properties of the surface

After this process, however, the surface is not perfectly smooth and must be machined with a special grinding wheel — this is exactly where the EHWA Mevious grinding wheel comes in.

Technical highlights of the EHWA Mevious grinding wheel

• Hybrid technology – combination of a metal and a ceramic bond for optimal grinding performance
• Long tool life – high wear resistance and excellent profile stability
• Optimized surface quality – ensures a uniform and precise final finish

Conclusion

With the EHWA Mevious grinding wheel, manufacturers gain a powerful solution for machining brake components with applied stainless-steel layers. Thanks to its hybrid technology, it delivers long service life, high grinding performance, and good surface quality.

Want to learn more? Contact us for further technical details.