Modern Sonata's Front Brake Discs

There are different corresponding codes for the HYUNDAI 51712L1000 Front Brake Rotor

Precise Regulation of Optimal Roughness Range: Achieve Silent Braking Experience Below 63 Decibels
After tens of thousands of adjustments to grinding parameters, the surface roughness of Modern Sonata's front brake discs 51712L1000 is steadily maintained within the optimal range of Ra1.4-2.0μm. This precision prevents unstable braking caused by overly smooth surfaces and eliminates friction noise generated by excessively rough surfaces.

• Uniform Micro Texture: The regular micro texture formed by grinding fits perfectly with the brake pad surface, keeping the friction coefficient stable between 0.36 and 0.43, and delivering linear and distinct brake pedal feedback.
• Turbulent Flow Suppression: Combined with surface polishing of 36 large fillet curved cooling fins, turbulent flow howling during high-speed rotation is effectively reduced.
• Bench Verification: After 1200 noise tests under full working conditions, the braking noise stays below 63 decibels at speeds under 80km/h, ensuring undisturbed in-car conversation and music enjoyment.

Collaborative Optimization of Open Ventilated Surface: Dual Improvement of Heat Dissipation and Wear Resistance
While focusing on friction surface precision, the surface technology of the open ventilated structure is optimized simultaneously:

• Sand blasting is applied to cooling fin surfaces, expanding the heat dissipation area by 15%. Supported by the three-dimensional ventilation design with 36 curved cooling fins, the air circulation efficiency rises by 35% compared with ordinary brake discs.
• Fillet chamfering is adopted on ventilation groove edges to avoid cracks caused by stress concentration and reduce accumulation of brake dust.
• The entire surface is evenly coated with an 8-12μm zinc-aluminum-magnesium alloy layer, covering blind areas including inner parts of cooling fins and mounting hole edges. No red rust appears after 750 hours of salt spray test, balancing corrosion resistance and heat dissipation performance.

Independent Full-Process Production to Build an Integrated Solution
Dingzheng Machinery has achieved independent full-process production ranging from raw material casting and machining to surface treatment and finished product inspection. The company is equipped with two casting electric furnaces, 22 CNC processing machines, and a complete set of production and testing facilities. All core processes are completed in-house, ensuring full control over product quality throughout the entire process.

We have an independent mold development department capable of independently designing and manufacturing various brake disc molds. At present, we offer more than 5,050 product models and over 3,020 sets of production molds. Our product surface treatment processes are comprehensive, including conventional processes such as drilling, grooving, spraying, and Dacro treatment. Meanwhile, we can produce high-carbon steel brake discs, modified steel brake discs, and dedicated racing brake discs.

The integrated full-process production model enables us to provide customers with a one-stop solution covering product design, production, and delivery.

Warranty Terms
Modern Sonata's front brake discs 51712L1000
The front brake disc enjoys a manufacturer warranty of 70,000 kilometers or 12 months. It has passed the specification verification of Hyundai midsize sedan braking systems, and is designed for urban commuting and high-speed driving conditions of Elantra, Sonata and other models. The warranty covers casting defects, surface treatment flaws and excessive dynamic unbalance. Damage caused by installation not complying with original torque standards, use of inferior brake pads and modified calipers is not covered by the warranty.

Logistics Arrangement
Orders for brake discs of Hyundai Elantra and Sonata family sedans can appoint freight forwarders and shall provide the contact information within 48 hours after order confirmation. Each brake disc weighs approximately 8.2 kilograms. Land transportation is recommended for bulk orders to cut shipping costs. Deliveries reach Jiangsu, Zhejiang, Shanghai and Anhui regions on the next day, and arrive at major domestic cities within 3 to 5 days.

Quality Assurance
Every Hyundai 51712L1000 brake disc undergoes 100% full inspection before delivery, complying with tolerance standards for midsize family cars: diameter tolerance ±0.08mm, thickness tolerance ±0.04mm, and face runout no more than 0.022mm. If any specification discrepancy or transport damage is found, submit clear multi-angle photos and order number to our exclusive after-sales service channel for family vehicles. Solutions will be offered within 36 hours, with free replacement or full refund available.

Q: How does the Modern Sonata's front brake discs 51712L1000 resolve brake vibration during urban commuting for Elantra CN7?
A: It adopts ultra-precision double-sided grinding technology, with the thickness deviation of a single disc no more than 0.035mm and face runout no more than 0.022mm, which is far above the industrial average standard. Vanadium-titanium alloy elements are also added to enhance material uniformity, fundamentally eliminating low-speed brake vibration.

Q: Is part number 51712L1000 compatible with the electronic parking brake system of Sonata DN8 Hybrid?
A: Fully compatible. 51712L1000 is a universal original front brake disc model for Hyundai Elantra CN7, Sonata DN8 and Sonata Hybrid, achieving perfect adaptation to the electronic parking brake system.

Q: What is the replacement cycle of brake discs for Hyundai Elantra CN7?
A: Replacement is recommended every 60,000 to 70,000 kilometers under daily urban driving conditions. Inspection every 50,000 kilometers is advised for frequent highway or mountain road driving. Immediate replacement is required once the disc wears down to the minimum thickness of 23mm.

While adhering to the bottom line of product safety, Dingzheng Machinery actively upholds the concept of green development and continuously invests in environmental protection technological transformation. The company has successively introduced fully enclosed Dacro coating production lines and waste gas treatment systems, achieving VOCs emissions during production that are far below national standards. It has also vigorously promoted chromium-free environmentally friendly coating processes, contributing to the green transformation of the industry. In addition, the company adheres to a market demand-oriented approach, relying on independent research and development capabilities to continuously launch braking products adapted to new vehicle models, providing global customers with cost-effective safety solutions.

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