A new benchmark in brake disc technology,
Hard Metal Cladding
Regulations on brake wear particulate emissions are becoming a reality. As coating technologies advance, the importance of supporting grinding technologies is also increasing. KJST provides the solution.
Euro 7 — Beyond Emissions, Now Brake Dust
The Euro 7 regulation redefines environmental standards in the automotive industry. Beyond traditional exhaust emissions, it includes brake wear particles (PM10) generated during driving. Electric vehicles (EVs) are no exception, and with increasing vehicle weight, brake dust control is becoming even more critical.
A Common Challenge for the Global Automotive Industry
Phased implementation starting in Europe and expanding to major markets. New brake disc materials and processing technologies are becoming essential.
EVs Are Not Exempt
Due to higher vehicle weight, dust control under high-load braking conditions is becoming a critical challenge.
Hard Metal Cladding — The Answer Exists, But Grinding Is the Challenge
Laser cladding technology, which fuses ultra-hard alloys such as tungsten carbide onto cast iron disc surfaces, significantly reduces brake dust and is gaining attention as a key solution for Euro 7 compliance. However, precision machining after coating remains a major challenge. Due to the high surface hardness of the coating layer, machining difficulty increases significantly compared to conventional cast iron, making it difficult to achieve micrometer-level flatness and parallelism with traditional grinding methods alone.
Key Technical Challenges
Ultra-hard cladding layers accelerate tool wear. Achieving both high-precision flatness and surface finish while maintaining productivity remains a significant challenge.
Ultra-Hard Coating Surface — Accelerated Tool Wear
With hardness exceeding ~1,500 HV (tungsten carbide), conventional grinding tools wear rapidly, making stable machining conditions difficult to maintain.
Lack of Dedicated Cladding Process Data
Insufficient accumulated data on optimized CBN wheel specifications (grain size, bond type, concentration) limits process optimization.
Balancing Ultra-Precision and Mass Production
Achieving micrometer-level precision alongside productivity requires precise control and optimization of process conditions.
25 Years of Grinding Technology Expertise
Based on extensive experience in brake disc grinding machines, KJST is focusing on developing optimized grinding solutions for cladded discs.
Development of Dedicated CBN / Diamond Wheels
Optimized tool solutions through redesign of bond and grain size based on the ultra-hard properties of cladding layers, improving tool life, machining stability, and surface quality simultaneously.
Cladding-Specific Double Disc Grinder
Direct-drive PM motors enhance energy efficiency, while high-rigidity structure and precision control deliver ultra-precision grinding performance.
All-in-One Turnkey Solution
A fully integrated turnkey solution covering the entire brake disc post-processing line from turning to measurement, ensuring stable realization of both high precision and mass production.
Eco-friendly cladded disc machining technology,
prepare for the future with KJST.
We welcome inquiries on technology development and equipment implementation.