HYUNDAI H-1 Cargo Front Brake Discs

This brake disc is tailor-made for the Hyundai Grand Starex large commercial MPV manufactured from 2007 to 2021. Fully optimized for heavy-duty operating conditions including fully loaded rides with 7 to 12 seats, long-distance high-speed passenger transportation and urban logistics distributon, it perfectly adapts to thehigh torque output of the 2.5L diesel engineHeavy-load braking stability: It features an thickened disc body and high-rigidity cooling ribs, boosting rigidity by 35% compared with ordinary brake discs for family cars. In 20 consecutive braking tests from 120km/h to 0km/h under a full load of 1.8 tons, the disc deformation is no more than 0.02mm with no obvious thermal fading, guaranteeing braking safety when carrying full passengers and cargo.Long-service-life and wear-resistant design: Made of high-carbon gray cast iron blended with proper chromium and copper alloy elements, it maintains a stable hardness ranging from HB190 to HB230 and delivers 25% higher wear resistance than conventional brake discs. Optimized friction surface formula suits the high annual mileage of commercial vehicles, enabling a service life of over 60,000 kilometers under normal use.Thermal fatigue and crack resistance: Adopting integral casting technology and processed with one high-temperature normalizing treatment and two low-temperature tempering treatments, the disc has completely eliminated internal stress. No cracks or deformation occur during rapid cooling cyclic tests at 550℃, allowing it to withstand thermal shocks generated by frequent braking during long-distance high-speed driving.

There are different corresponding codes for the HYUNDAI 517124H100 front brake disc

Special workshop environment for commercial vehicles ensures efficient and stable production

Featuring a large-span and high-clearance design, the workshop accommodates large-scale equipment and mass material handling. It is also equipped with a comprehensive environmental control system to guarantee stable production operations.

• Zoned production layout: The workshop is scientifically divided into blank area, rough machining area, finish machining area, surface treatment area and finished product area. Materials are transported via a combination of forklifts and conveyor belts, enabling efficient circulation for mass production. The floor is paved with heavy-duty wear-resistant flooring, capable of enduring long-term rolling pressure from heavy equipment and materials.
• Temperature and humidity control: A constant temperature of 23±3℃ and relative humidity of 55±10% are maintained in the finish machining zone, which effectively controls thermal deformation of machine tools and secures dimensional consistency in mass production. Given the large size and heavy weight of commercial vehicle brake discs, the workshop ventilation system is optimized to reduce dust and noise generated during processing.
• 5S on-site management system: Strict 5S management standards including sorting, setting in order, sweeping, standardizing and sustaining are implemented. All tools, materials and equipment are clearly marked and fixedly positioned. Aisles are kept unobstructed, and the floor stays free of oil stains, water accumulation and sundries, safeguarding production safety and product quality.

Special Processing Equipment and Optimized Techniques for Commercial-grade Quality
Tailored to the 36 straight reinforced cooling fins, thickened disc body and high rigidity requirements of the HYUNDAI H-1 Cargo 517124H100 front brake disc, dedicated processing equipment and process parameters verified tens of thousands of times are deployed.

• CNC vertical lathe cluster: A dedicated production line consists of 12 high-end domestic CNC vertical lathes, efficiently machining the 300mm large-diameter disc body of the 517124H100 brake disc. Each lathe is fitted with automatic loading and unloading manipulators to realize non-stop 24-hour production, with a daily output of 150 pieces per unit. After processing, the concentricity of the inner and outer circles of the brake disc is no more than 0.012mm, and the cylindricity of the central hole is no more than 0.01mm, fully complying with tolerance requirements of modern commercial vehicles.
• Special cooling fin milling equipment: Six customized multi-axis milling machines are deployed exclusively to process the 36 straight reinforced cooling fins of the 517124H100 brake disc. High-speed milling with cemented carbide cutters ensures the errors in height, width and spacing of cooling fins are within 0.1mm, and the surface roughness Ra is no higher than 6.3μm. The reinforced fin structure boosts heat dissipation efficiency and overall disc rigidity, resisting tremendous stress under heavy-load braking.
• Heavy-duty double-sided grinding machine: Domestic heavy-duty double-sided grinders conduct final surface finishing. For the 30mm thickened disc body of the HYUNDAI H-1 Cargo 517124H100 front brake disc, the thickness deviation of a single disc is controlled within 0.04mm and face runout within 0.025mm. The technique of grinding both surfaces in one clamping guarantees surface parallelism and prevents braking jitter.
• Optimized heat treatment process: Adopting high-temperature normalizing plus two low-temperature tempering processes suited to the service characteristics of commercial vehicle brake discs. After rough machining, brake discs are heated and held in a normalizing furnace at 900±10℃, then air-cooled to room temperature to enhance material strength and hardness. Two subsequent low-temperature tempering procedures eliminate internal stress and improve thermal fatigue resistance. After treatment, the content of type A graphite in metallographic structure reaches no less than 90%, pearlite content no less than 95%, and hardness remains steadily between HB190 and HB230.
• Automatic dynamic balance correction: Every 517124H100 brake disc is inspected and corrected by an automatic dynamic balancer. The drilling weight removal method limits dynamic balance precision to 10g·cm or lower, surpassing the original manufacturer standard of 15g·cm. It ensures stable high-speed driving and avoids steering wheel vibration.

Q: How does the HYUNDAI H-1 Cargo 517124H100 front brake disc
meet the braking demands of the fully loaded Grand Starex carrying 12 passengers?
A: It features a 30mm thickened disc body and 36 reinforced cooling fins, boosting rigidity by 35%. It has passed 20 consecutive extreme braking tests under a full load of 1.8 tons, with deformation kept within 0.02mm and thermal fade rate lower than 15%, guaranteeing safe braking under full load conditions.

Q: Is part number 517124H100 compatible with the old Grand Starex model 517124H000?
A: Fully compatible. The 517124H100 is an officially upgraded version of 517124H000. It adopts optimized cooling fin structure and material formula, delivering improved braking performance and service life.

Q: Is it necessary to replace the brake fluid simultaneously when installing the 517124H100 brake disc?
A: Synchronous replacement is recommended. The braking systems of commercial vehicles operate under heavy load, making brake fluid prone to water absorption and deterioration. Complete brake fluid replacement along with new disc installation maintains optimal braking performance and extends the service life of brake discs and pads..

As a professional manufacturer in the field of automotive braking safety, Laizhou Dingzheng Machinery Co., Ltd. has always maintained that corporate social responsibility is first reflected in the ultimate pursuit of product quality. To this end, the company has established a full-life-cycle quality control system covering raw material incoming inspection, casting, machining, surface treatment and finished product delivery. Each brake disc undergoes more than 20 strict inspection procedures to ensure the driving safety of car owners worldwide from the source.

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