81.35100.6425 rear axle main reducer assembly shacman f2000 f3000 X3000 X5000 X6000 Hande

Product Description of 81.35100.6425 Rear Axle Main Reducer Assembly (28/21, i=5.262)I. Product Overview81.35100.6425 Rear Axle Main Reducer Assembly, with core parameters of gear tooth ratio 28/21 and speed ratio i=5.262, is a core transmission component of the rear axle drive system for heavy-duty vehicles such as heavy-duty trucks and engineering vehicles. Its core function is to reduce speed, increase torque, and change the direction of power transmission, converting the high-speed, low-torque transmitted by the engine into low-speed, high-torque to provide sufficient wheel-end driving force for vehicle operation. Among them, 28/21 is the core basis for speed ratio calculation, that is, the driven gear has 28 teeth and the driving gear has 21 teeth, and the ratio of the two corresponds to the speed ratio i=5.262. It is a large speed ratio design, specially designed for high-intensity operation scenarios such as heavy load, climbing, and complex road conditions. It has reliability, durability and adaptability, and is a key core component to ensure the stable operation and sufficient power of heavy-duty vehicles.II. Product Features

• Precise Speed Ratio Adapted to Heavy Load Requirements: Adopting a large speed ratio design of i=5.262, accurately calibrated based on the 28/21 gear tooth ratio, the speed reduction and torque increase effect is significant. It can efficiently convert engine power into large wheel-end torque, perfectly adapting to complex working conditions such as heavy load, climbing, and muddy roads, solving the pain points of insufficient power and weak climbing ability of heavy-duty vehicles, and ensuring stable power output of the vehicle under high-intensity operations.
• Exquisite Gear Technology and Efficient Transmission: The core transmission gears are forged from high-strength alloy materials, and undergo multiple processes such as precision machining, carburizing and quenching, and gear grinding. They have high tooth surface smoothness and excellent meshing accuracy. The gear module and tooth profile design are consistent with the 28/21 tooth ratio, and the meshing gap is precisely controlled, which effectively reduces wear, noise and energy loss during transmission, with high transmission efficiency and stable operation without obvious abnormal noise.
• Compact Structure and Strong Adaptability: Adopting an integrated shell design, it integrates core components such as the main reducer and differential. The layout is scientific and reasonable, occupying a small space. It is strictly designed according to the standard size of the rear axle of heavy-duty vehicles, adapting to the rear axle installation needs of various heavy-duty vehicles. No additional modification is required, and it can be directly replaced and assembled, with wide adaptability.
• Outstanding Load-bearing and Impact Resistance: The shell is made of high-strength cast iron, which has undergone precision casting and aging treatment, with strong rigidity and excellent anti-deformation ability. It can effectively bear the impact load and torque pressure during the operation of heavy-duty vehicles; both gears and bearings are of high load-bearing specifications, which can bear long-term high-torque transmission, are not easy to be damaged, and are suitable for long-term heavy-load operation needs.
• Excellent Sealing and Protection, Low Failure Rate: Adopting a combined sealing design of skeleton oil seal and lip oil seal, the sealing performance is reliable, which can effectively prevent lubricating oil leakage, and at the same time isolate external impurities such as dust, water vapor, and sediment from entering the interior, protecting core components such as gears and bearings from wear; the internal lubrication system is optimally designed to ensure full lubrication of all transmission components, reduce component wear, and greatly reduce the failure rate.
• Excellent Differential Performance and Stable Operation: Equipped with a built-in wheel-side differential, it can automatically adjust the speed difference between the left and right wheels according to road conditions, avoid wheel slipping, improve the passability and driving stability of the vehicle under complex road conditions, and at the same time reduce tire wear, extend tire service life, and adapt to multi-condition driving needs.

III. Product Specifications

• Product Model: 81.35100.6425
• Product Name: Rear Axle Main Reducer Assembly
• Adapted Models: Heavy-duty trucks, engineering dump trucks, tractors, mining vehicles and other heavy-duty models
• Speed Ratio (i): 5.262
• Gear Tooth Ratio: 28/21 (28 teeth on the driven gear, 21 teeth on the driving gear)
• Transmission Form: Bevel gear meshing transmission, single-stage speed reduction and torque increase (core adapted to the rear axle drive system)
• Maximum Output Torque: ≥75000N.m (can bear long-term high-torque transmission, adapted to heavy load requirements)
• Shell Material: High-strength cast iron, anti-deformation, wear-resistant and corrosion-resistant
• Gear Material: High-strength alloy steel, treated by carburizing and quenching, impact-resistant and wear-resistant
• Bearing Type: High-quality tapered roller bearings, which can bear radial and axial forces to ensure stable transmission
• Seal Type: Skeleton oil seal + lip oil seal, waterproof, dustproof and anti-lubricating oil leakage
• Installation Method: Designed according to the standard size of the original vehicle, bolt-fixed, adapted to the original vehicle installation position, no additional modification required
• Applicable Oil Temperature: -40℃~120℃, adapted to high and low temperature complex environment operations

IV. Product Advantages(I) Strong Adaptability to Heavy Loads and Powerful Power OutputSpecially designed for heavy-load scenarios, the large speed ratio of i=5.262 combined with the precise 28/21 tooth ratio has a significant speed reduction and torque increase effect. The maximum output torque can reach more than 75000N.m, which can fully meet the power needs of heavy vehicles for high-intensity operations such as heavy load, climbing, and muddy roads. The wheel-end driving force is sufficient, solving the core pain points of insufficient power and weak climbing ability of heavy-duty vehicles, and ensuring efficient operation of the vehicle under complex working conditions.(II) Exquisite Craftsmanship and Long Service LifeCore components are made of high-strength materials and advanced manufacturing processes. Gears are processed through multiple processes such as carburizing and quenching, and gear grinding, with excellent wear resistance and impact resistance; the shell is precision cast from high-strength cast iron, with strong rigidity and anti-deformation, which can bear long-term high torque and impact load; the perfect sealing and lubrication design reduces wear of internal components, extends the service life of the product, has low later maintenance and replacement costs, and is suitable for long-term high-intensity operation.(III) Efficient Transmission and Better Energy ConsumptionThe optimized gear meshing design, combined with the precise 28/21 tooth ratio, has a reasonable meshing gap and small power transmission loss, and the transmission efficiency is significantly higher than that of ordinary main reducers; at the same time, the precise speed ratio matching design can optimize vehicle fuel consumption on the premise of ensuring heavy-load power, balancing power performance and economy, and can significantly reduce user operation costs in long-term use.(IV) Easy Installation and Strong VersatilityStrictly mold-produced according to the standard size of the rear axle of heavy-duty vehicles, the mounting holes and connection parts are completely matched with the original vehicle, no additional modification or debugging is required, the installation process is simple and efficient, and assembly and replacement can be completed quickly, saving maintenance man-hours and installation costs. At the same time, the product adopts a standardized design, which is compatible with the rear axle system of various heavy-duty vehicles, has strong versatility, and can be flexibly adapted to the vehicle needs of different users.(V) Stable Operation and Low Failure RateThe product has undergone strict performance testing and working condition simulation. Every component has been precisely adjusted, with stable operation and no obvious abnormal noise; the perfect sealing and protection design effectively isolates external impurities, avoiding wear and failure of internal components; the optimized lubrication system ensures full lubrication of all transmission components, preventing component damage caused by overheating, greatly reducing the product failure rate, reducing downtime caused by faults, and ensuring normal operation of the vehicle.(VI) Strong Environmental Adaptability and Wide Application ScenariosAdapted to a wide temperature environment of -40℃~120℃, it can operate stably in harsh working environments such as high temperature, low temperature, humidity, and dust without additional protective measures; the large speed ratio design and excellent load-bearing capacity are suitable for various complex working conditions such as highway heavy-load transportation, mining, engineering construction, and field operations, especially for heavy-load scenarios with high requirements on vehicle power and load-bearing capacity.V. Application ScenariosThis product (81.35100.6425 Rear Axle Main Reducer Assembly, 28/21, i=5.262) is mainly applied to the rear axle drive system of various heavy-duty vehicles such as heavy-duty trucks, engineering dump trucks, tractors, and mining vehicles. It is suitable for various complex working conditions such as highway heavy-load transportation, mine underground operations, engineering site material transfer, and mountain heavy-load transportation. It is especially suitable for operation scenarios that require frequent climbing, large load capacity, and complex road conditions. It can stably play the core role of speed reduction, torque increase, and power transmission, ensuring efficient, safe and stable operation of the vehicle.