SSANGYONG KORANDO Rear Brake Disc

In terms of material, we use high-carbon alloy cast iron as the base, a material that combines exceptional tensile strength, thermal conductivity, and wear resistance. This isn't ordinary cast iron; it's specially smelted to eliminate internal defects like porosity and cracks, ensuring the brake disc can withstand high temperatures and frequent braking impacts without deformation or failure-ideal for both daily commuting and light off-road use, which SsangYong models are known for.

What sets this brake disc apart is its integrated advanced surface treatment process, combining four core technologies for optimal performance. First, surface scoring technology creates precise, uniform grooves on the friction surface, optimizing the friction coefficient and facilitating rapid heat discharge during braking, avoiding thermal deformation. On this basis, a drilled structure with evenly distributed through holes reduces overall weight (easing vehicle load) and further boosts heat dissipation efficiency, preventing overheating during frequent braking.

There are different corresponding codes for the rear brake disc of Rear Brake Disc of SSANGYONG KORANDO 4840134001

After coating, the friction surface undergoes non-directional precision polishing, strictly controlling surface roughness to ≤0.6μm. This process optimizes the friction coefficient between the disc and pad, reducing abnormal noise and brake pulsation, while the uniform surface texture facilitates rapid running-in of new brake pads. To put it simply, you'll notice smoother braking and no annoying squeals right from the start.
For non-friction surfaces, a nanometer anti-rust sealant is applied, which forms an invisible protective film to resist road salt, rainwater and humid air erosion. This effectively prevents rust jacking and surface oxidation, extending the brake disc's service life by 2-3 years, even in harsh coastal or winter climates. Unlike ordinary anti-rust coatings, it doesn't affect the disc's thermal emissivity, ensuring efficient heat dissipation.

An advanced production line serves as a model for the collaborative operation of various special-purpose machines and robots. The process typically starts with a CNC vertical lathe, which performs integrated rough and finish turning on the disk surface to establish the reference plane and outer circle dimensions. Subsequently, a six-axis robotic arm automatically grabs the workpiece, flips it precisely, and feeds it into the next process. The workpiece then enters a drilling and tapping machining center, which accurately completes the drilling and tapping of all mounting holes in one go, ensuring the absolute precision of the Pitch Circle Diameter (PCD) of mounting holes. After that, the critical high-speed grinding process conducts finish machining on the friction surface, significantly improving its finish and flatness - a key step in reducing brake noise and ensuring uniform friction. All finished products must undergo rigorous inspection by a dynamic balance testing and correcting instrument to ensure no unbalanced vibration occurs during high-speed rotation, eliminating brake judder at its physical root cause. Finally, an automatic laser marking machine assigns each product a unique identity mark, enabling full life cycle traceability.

Geometric Precision as the Foundation**: Consistency of thickness, parallelism of the mounting surface, and circular runout tolerance of the friction surface are fundamental to ensuring even contact of brake pads and avoiding noise and judder. This requires CNC machine tools to maintain long-term rigidity and precision, with tolerances typically controlled within the high standard of 0.001 millimeters.

Item Rear Brake Disc of SSANGYONG KORANDO 4840134001 is individually wrapped with double-layer shockproof OPP EPE foam and surrounded by a rigid cardboard ring to prevent paint scratching and disc surface abrasion caused by handling during ocean shipment and container stacking. Goods are shipped directly from the manufacturer based in Shandong. The standard production and lead time stands at 32 to 42 working days upon order confirmation; the delivery timeline can be shortened to 28 days for long-term full-container key clients through negotiation. Air freight expedited delivery is available for urgent unexpected orders, with all extra air freight costs borne by the buyer.

Buyers are entitled to appoint their preferred freight forwarder by submitting the forwarder's complete contact information within 72 hours after order finalization. Full-container shipments are conventionally loaded at Qingdao Port, with well-established shipping lines of COSCO Shipping and Maersk recommended as top options for full-container purchases by auto parts importers from Europe, Australia and the Middle East. Consolidated sea freight is accessible for small-batch sporadic orders. In line with the fragmented overseas procurement characteristics of Ssangyong spare parts, consolidated shipments effectively cut down per-unit ocean transportation expenses for small and medium-sized purchasers.

Q1: Can the rear brake disc with part number 4840134001 be installed long-term on a 2015 Rexton W 2.7T diesel model for towing a 3.5-ton trailer?
A: It is fully compatible. Bench tests for this rotor were calibrated based on the factory-rated maximum towing load of 3500kg for the Rexton W. Made of GG25 high-carbon cast iron, it delivers better resistance to high-temperature deformation than original-equipment brake discs and is less prone to wavy surface distortion during prolonged trailer towing. Nevertheless, shortening the inspection interval of the vehicle's brake system is recommended for continuous heavy-load towing to prevent premature brake pad wear that could in turn damage the disc.

Q2: After fitting the 4840134001 brake disc, faint abnormal noises occur during low-speed vehicle movement. Does this indicate defective factory quality of the brake disc itself?
A: The vast majority of such noises are unrelated to the brake disc. Ssangyong off-road vehicles frequently travel on rough terrain, allowing silt and gravel to embed into the friction layer of brake pads. Cleaning the brake pads with isopropyl alcohol is the preferred solution to eliminate abnormal noise. Replacement of the brake rotor is only required when unilateral groove depth on the disc surface exceeds 0.45mm or the measured disc thickness drops below the factory minimum limit of 18.2mm.

Q3: What is the factory-controlled lateral runout tolerance for the 4840134001 brake disc? How to quickly troubleshoot brake pedal vibration after installation?
A: Finished products from our factory are manufactured with controlled unilateral lateral runout of no more than 0.045mm, complying with Ssangyong's original fitting specifications. If brake pedal vibration emerges post-installation, remove the brake disc first to clear rust and debris from the wheel hub spindle before remeasuring runout. If the issue is verified to stem from factory machining defects of the disc, a free replacement under warranty can be processed directly..

Market data shows that the global brake disc market is expected to reach $15.68 billion by 2032, with a CAGR of 8.4% from 2026 to 2032, driven by technological upgrades and increasing demand for safety and sustainability. Lightweight design is also a key trend-stainless steel brake discs can reduce the weight of a full set by up to 5 kg, lowering vehicle energy consumption and improving driving dynamics.

These latest technological upgrades not only meet the increasingly stringent global emission and safety standards, but also break the limitations of traditional brake discs in durability and environmental protection. Whether for aftermarket replacement, wholesale or customized demand, the newly upgraded brake discs can better adapt to the needs of global markets, balancing performance, environmental protection and cost-effectiveness.

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