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As a premier manufacturer and direct supplier of heavy-duty commercial vehicle components, we present this precision-engineered complete differential assembly. Designed for rigorous fleet operations, it ensures seamless power distribution and maximum vehicle uptime under the most demanding conditions.
Directly sourced from a certified manufacturer
Engineered for extreme high-torque applications
Precision-machined for exact component fitment
Backed by a reliable global supplier network
The complete differential assembly serves as the mechanical heart of your heavy-duty truck's drivetrain, translating rotational force into relentless forward momentum. Crafted from high-purity alloy steel, the heavy, cold touch of the robust metallic finish speaks volumes about its underlying durability and exceptional craftsmanship. When engaged, the meshing gears operate with a barely perceptible, smooth hum—a direct auditory confirmation of the ultra-fine tooth surface roughness and topological edge trimming that eliminates destructive grinding and vibration. Fleet operators face the constant challenge of vehicle downtime and escalating maintenance costs caused by drivetrain failures under massive payloads. This assembly directly resolves these pain points by distributing torque efficiently across the rear axle, preventing wheel slippage, and ensuring stable, unwavering traction on uneven or treacherous terrains. By minimizing internal friction and oil mixing loss, it dramatically improves transmission efficiency, ultimately reducing fuel consumption and preventing the dangerous overheating that causes that distinct, acrid smell of burning gear oil during intense climbs. The precise engineering ensures that every rotation feels solid and controlled, granting drivers absolute confidence when hauling maximum capacities across vast, unforgiving distances.
Product Name | Complete Differential Assembly |
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OEM Part Numbers | 9423502123, 81.35107.6044, 81.35107.6035 |
Applicable Models | Mercedes Benz Axor, Actros Heavy Duty Trucks |
Material | High purity alloy steel 20CrMnTiH |
Surface Hardness | HRC 58-62 |
Core Hardness | HRC 30-35 |
Depth of Carburized Layer | 1.2-1.6mm |
Gear Accuracy | National standard level 6 (Equivalent to ISO 1328 class 6) |
Tooth Surface Roughness | Ra ≤ 0.8 μm |
Meshing Noise | ≤ 75dB |
Torque Capacity | ≥ 12000 Nm |
Fatigue Life | ≥ 500,000 cycles |
Transmission Efficiency | ≥ 98.5% |
Surface Treatment | Phosphating coating, Shot peening strengthening |
Shaping Process | Chamfering of tooth ends and topological edge trimming |
Certification | ISO/TS16949, CE |
Warranty | 1-2 Years |
Core technical parameters | |
Materials and Heat Treatment | Accuracy standards |
High purity alloy steel with grade 20CrMnTiH | Gear accuracy: National standard level 6 (equivalent to ISO 1328 class 6) |
performance metrics | special process |
Torque capacity: ≥ 12000 Nm (suitable for rear axle rated load) | Shot peening strengthening of tooth surface: increases fatigue strength by 40% |
Upgrading your fleet's drivetrain components requires parts that not only meet but exceed original equipment standards. This differential assembly is engineered with specialized metallurgical processes and advanced machining techniques to deliver unparalleled reliability. It is designed to tackle the most demanding haulage tasks, ensuring that your commercial vehicles remain on the road and out of the repair shop, thereby maximizing your operational profitability.
Optimized Power Distribution: Intelligently transfers torque to the wheels with the most traction, significantly improving vehicle handling and structural stability during heavy-load cornering.
Friction Reduction Architecture: Meticulously designed gear tooth profiles reduce mechanical drag, lowering operating temperatures and preserving gear oil integrity over long-haul routes.
Vibration Dampening Construction: Engineered to absorb severe shock loads and drivetrain vibrations, protecting surrounding axle components from premature wear and catastrophic failure.
Corrosion Resistant Shielding: Specialized external treatments provide a robust, impenetrable barrier against moisture, corrosive road salts, and harsh environmental elements.
Streamlined Fleet Integration: Manufactured to exact dimensional tolerances, allowing your technicians to perform swift, hassle-free installations and accelerate maintenance turnaround times.
The foundation of any reliable drivetrain component lies in its metallurgical composition. We utilize high-purity 20CrMnTiH alloy steel, renowned across the automotive industry for its exceptional structural integrity. Through a rigorous deep carburizing and quenching process, we achieve a dual-hardness profile that is absolutely essential for heavy-duty commercial applications, ensuring the unit can withstand years of relentless punishment.
Surface hardness of HRC 58-62 provides an impenetrable shield against continuous abrasive wear and metal-to-metal friction.
Core hardness of HRC 30-35 maintains the necessary internal ductility to absorb sudden mechanical shocks without fracturing.
A precise carburized layer depth of 1.2-1.6mm guarantees long-lasting impact toughness under extreme stress.
Effectively prevents catastrophic gear failure during sudden torque spikes on steep, unforgiving inclines.
A quiet drivetrain is a highly efficient drivetrain. By strictly adhering to National standard level 6 (equivalent to ISO 1328 class 6), the gear accuracy of this assembly guarantees flawless, uninterrupted meshing. This precision machining translates to a remarkably smoother ride and significantly less auditory fatigue for the operator, while simultaneously reducing the mechanical strain on the entire rear axle assembly.
Tooth surface roughness is strictly maintained at Ra ≤ 0.8 μm, creating a mirror-like finish that glides seamlessly.
Meshing noise is suppressed to below 75dB, indicating minimal internal friction and maximum energy retention.
Completely eliminates the harsh, destructive grinding sounds typically associated with inferior aftermarket replacements.
Enhances the overall driving experience by providing a stable, vibration-free power transfer from the driveshaft to the wheels.
Fleet profitability relies heavily on the longevity and efficiency of vehicle parts. This differential assembly is built to endure the punishing realities of continuous freight transport, perfectly matching the rated load requirements of heavy-duty rear axles. It is a component designed not just to function, but to excel over hundreds of thousands of miles, actively driving down your cost per mile.
Boasts a massive torque capacity exceeding 12000 Nm, effortlessly handling fully loaded trailers and oversized cargo.
Proven fatigue life of over 500,000 bench test cycles guarantees years of uninterrupted, reliable service.
Achieves a remarkable transmission efficiency of ≥ 98.5%, directly converting engine power into forward motion with minimal loss.
Optimized tooth design minimizes oil mixing loss, contributing to measurable and consistent reductions in overall fuel consumption.
To combat the extreme stresses placed on gear teeth, we employ specialized surface enhancement techniques. These advanced processes fundamentally alter the surface mechanics of the metal, providing an extra layer of defense against microscopic cracking, pitting, and metal fatigue. This attention to microscopic detail is what separates a standard replacement part from a true operational upgrade.
Shot peening strengthening bombards the tooth surface, increasing overall fatigue strength by a massive 40%.
A specialized phosphating coating significantly improves the metal's ability to adsorb and retain lubricating oil during high-speed rotation.
Topological edge trimming and precise chamfering of tooth ends eliminate dangerous edge stress concentrations.
Drastically reduces the risk of chipped or broken teeth under severe load-bearing conditions and sudden braking events.
Time spent in the repair bay is lost revenue. This assembly is engineered to provide a flawless drop-in replacement experience, eliminating the need for complex modifications, shimming, or adjustments during installation. It strictly mirrors original equipment specifications, providing procurement officers and fleet managers with absolute peace of mind regarding fitment and performance.
Directly replaces OEM part numbers 9423502123, 81.35107.6044, and 81.35107.6035 with zero compatibility issues.
Custom-engineered to fit the precise axle housing dimensions of Mercedes Benz Axor and Actros heavy-duty trucks.
Ensures a seamless integration with existing drivetrain components, maintaining the original vehicle dynamics and safety standards.
Accelerates maintenance schedules, allowing fleet technicians to perform faster, more reliable overhauls and get trucks back to work.
Securing procurement investments requires undeniable proof of quality and reliable post-purchase support. Our manufacturing facilities operate under the strictest international quality management systems, ensuring that every unit leaving the production line meets uncompromising standards of excellence. We stand behind our engineering, providing the comprehensive coverage that large-scale transport operations demand.
Fully compliant with ISO/TS16949 automotive industry quality management standards, ensuring consistent manufacturing excellence.
CE certification confirms adherence to rigorous global safety, health, and environmental protection benchmarks.
Backed by a comprehensive 1-2 year warranty, safeguarding your operational budget against unexpected material defects.
Comprehensive traceability protocols ensure every component can be tracked back to its original material batch.
Significantly lowers the total cost of ownership and mitigates procurement risks for large-scale fleet operations.
Sourcing critical heavy-duty components requires a partner who understands the intricate demands of large-scale fleet maintenance and supply chain stability. We combine decades of metallurgical expertise with state-of-the-art manufacturing facilities to deliver products that keep your operations moving forward. Our commitment extends far beyond the assembly line, focusing on creating long-term value, reducing vehicle downtime, and supporting the operational goals of procurement professionals and fleet directors alike.
Unmatched Production Capacity: Our advanced manufacturing infrastructure ensures consistent availability and rapid order fulfillment, regardless of your volume requirements.
Stringent Quality Control: Every differential assembly undergoes rigorous multi-point inspections, including ultrasonic flaw detection and dynamic balancing tests, before dispatch.
Technical Engineering Support: Gain access to a dedicated team of drivetrain specialists ready to assist with compatibility analysis, performance metrics, and installation guidance.
Optimized Supply Chain: Streamlined logistics and robust packaging protocols guarantee that your heavy-duty components arrive in pristine condition, precisely when needed.
Cost-Effective Excellence: By controlling the entire production process from raw material sourcing to final finishing, we deliver premium OEM-level quality without the inflated costs.
Navigating the technical specifications of heavy-duty drivetrain components can be complex. Below, we address some of the most critical inquiries from fleet maintenance professionals, mechanics, and procurement officers regarding the performance and integration of our complete differential assemblies.
How does the 20CrMnTiH alloy steel improve the lifespan of the differential assembly compared to standard materials?
20CrMnTiH is a premium structural alloy steel specifically formulated for high-stress gear applications. Its unique chemical composition allows for deeper, more uniform carburization during heat treatment. This results in a surface that is exceptionally resistant to abrasive wear, while the core remains tough enough to absorb the severe torsional shocks typical in heavy haulage, ultimately preventing premature gear shearing and extending the assembly's lifespan.
What is the practical operational benefit of the topological edge trimming process mentioned in the specifications?
Under extreme torque, the edges of gear teeth are highly susceptible to stress concentration, which can lead to micro-fractures and eventual tooth breakage. Topological edge trimming micro-machines the gear edges to distribute these forces more evenly across the entire tooth flank. This drastically reduces localized stress, ensuring the gears remain intact even when the truck is operating under maximum payload conditions.
How does the phosphating coating interact with the gear oil to improve overall transmission efficiency?
The phosphating process creates a micro-porous crystalline layer on the metal surface. This layer acts like a microscopic sponge, adsorbing and retaining gear lubricant far better than bare, untreated steel. This ensures a continuous, protective oil film remains between meshing gears even at high speeds, significantly reducing metal-to-metal friction, lowering operating temperatures, and minimizing energy loss.
Are these differential assemblies dynamically balanced before shipping to prevent axle vibration?
Yes, every complete differential assembly undergoes strict dynamic balancing procedures before leaving our facility. Imbalances in the rotational mass can cause severe vibrations, leading to accelerated wear on axle bearings, seals, and driveshafts. Our balancing process ensures smooth rotational dynamics, contributing to the exceptionally low ≤ 75dB meshing noise and protecting the broader axle ecosystem.
Can this assembly handle the continuous high-torque demands of off-road or construction site operations?
Absolutely. With a rated torque capacity of ≥ 12000 Nm and a fatigue life exceeding 500,000 test cycles, this unit is over-engineered for severe duty. The combination of shot-peened tooth surfaces and the deep carburized layer provides the necessary resilience to withstand the aggressive stop-and-go forces, heavy impacts, and uneven traction scenarios common in construction and off-road environments.
