481H-1007070BA
Product Details
Comprehensive Professional Description: Chery Tiggo Idler Gear (Part No. 481H-1007070BA)
1. Basic Overview & Core Functional Positioning
The 481H-1007070BA idler gear is an authentic Original Equipment Manufacturer (OEM) component exclusively engineered and produced by Chery Automobile Co., Ltd. for the Chery Tiggo series, a lineup of compact and mid-size SUVs renowned for their reliability, off-road adaptability, and cost-effectiveness in both urban and rural driving scenarios. As a critical transmission component in the vehicle’s engine timing system, the 481H-1007070BA idler gear plays an irreplaceable role in maintaining the synchronous operation of key engine components, ensuring optimal engine performance, fuel efficiency, and operational safety. Unlike non-critical auxiliary parts, this idler gear operates in a high-temperature, high-friction environment, enduring constant mechanical loads, rotational stress, and wear, making its quality, precision, and durability directly decisive for the Chery Tiggo’s engine lifespan, performance stability, and overall driving safety.
The Chery Tiggo series, including popular models such as the Tiggo 3, Tiggo 4, and Tiggo 5 (depending on regional configurations), relies heavily on the 481H-1007070BA idler gear to maintain the integrity of its engine timing system. Positioned between the crankshaft gear and the camshaft gear (or timing belt/chain), this idler gear serves as a core transmission hub, guiding and tensioning the timing belt or chain to ensure precise synchronization between the crankshaft and camshaft. Its core function is to transfer rotational power from the crankshaft to the camshaft, regulating the opening and closing of the engine’s intake and exhaust valves in perfect alignment with the piston’s up-and-down movement. This synchronization is critical for efficient combustion, as any misalignment can lead to valve-piston collision, engine damage, or significant performance degradation.
The part number 481H-1007070BA is a unique identifier for this Chery Tiggo-specific idler gear, distinguishing it from idler gears used in other Chery models (such as the Arrizo series or QQ series) or non-Chery brand vehicles. As a genuine OEM component, the 481H-1007070BA idler gear strictly complies with Chery’s original design standards, material specifications, and performance requirements, ensuring perfect compatibility with the Tiggo’s engine timing system, mounting points, and adjacent components (including the timing belt, tensioner, crankshaft gear, and camshaft gear). Unlike inferior aftermarket idler gears that often cut corners in material quality and precision manufacturing, the genuine 481H-1007070BA idler gear undergoes rigorous testing and validation to meet international automotive industry standards (ISO 9001 and IATF 16949), making it the preferred choice for Chery Tiggo owners and professional automotive repair technicians who prioritize long-term reliability, perfect fitment, and engine safety.
In addition to its core power transmission and synchronization functions, the 481H-1007070BA idler gear also plays a crucial role in reducing timing system noise and wear. By providing a smooth, stable guiding surface for the timing belt or chain, it minimizes friction between moving components, reducing noise and extending the service life of the timing belt/chain and other related parts. A faulty or ill-fitting idler gear can not only compromise the timing system’s synchronization but also lead to excessive noise, premature wear of the timing belt/chain, engine misfires, reduced fuel efficiency, and even catastrophic engine failure. Therefore, the genuine 481H-1007070BA idler gear is an essential replacement part for maintaining the Chery Tiggo’s engine performance, reliability, and safety.
2. Premium Material Selection & Precision Manufacturing Process
The Chery 481H-1007070BA idler gear is crafted from high-performance, automotive-grade materials, carefully selected by Chery’s engineering team to balance wear resistance, hardness, toughness, and lightweight design—key performance indicators for automotive timing system idler gears. Drawing on years of experience in automotive transmission component manufacturing and advanced material science, Chery prioritizes materials that can withstand the long-term effects of high temperatures (up to 150°C), high rotational speeds (up to 6,000 RPM), and constant friction, ensuring the idler gear maintains stable performance over a service life of typically 100,000–150,000 kilometers under normal operating conditions.
The main body of the 481H-1007070BA idler gear is made of high-quality alloy steel (40Cr), a material widely recognized in the automotive industry for its excellent wear resistance, high hardness, and good toughness. The alloy steel undergoes a strict heat treatment process (quenching and tempering) to enhance its surface hardness to HRC 58–62, ensuring it can withstand the high friction caused by contact with the timing belt or chain without excessive wear. The core hardness of the gear is maintained at HRC 30–35, balancing toughness and rigidity to prevent fracture under high rotational stress. This heat treatment process also improves the gear’s fatigue resistance, allowing it to withstand continuous rotational cycles without deformation or damage.
In addition to the alloy steel main body, the 481H-1007070BA idler gear also incorporates a high-precision bearing and a wear-resistant surface coating. The bearing, made of high-carbon chromium bearing steel (GCr15), is embedded in the center of the idler gear to ensure smooth rotation with minimal friction. The bearing is sealed with a high-temperature-resistant rubber seal to prevent the entry of dust, oil, and other contaminants, extending its service life and ensuring stable operation. The surface of the gear’s teeth is treated with a specialized anti-wear coating (tungsten carbide coating), which further enhances wear resistance and reduces friction between the gear and the timing belt/chain, minimizing noise and extending the service life of both the idler gear and the timing system components.
The manufacturing process of the 481H-1007070BA idler gear follows a strict, ISO 9001 and IATF 16949 certified production workflow, consistent with Chery’s global quality standards and modern automotive transmission component manufacturing practices. The production process begins with the precision forging of the alloy steel blank, which ensures the gear’s structural integrity and uniform material distribution. The forging process is carried out under high pressure (typically 200–250 tons) to shape the blank into the basic contour of the idler gear, eliminating internal defects such as pores and cracks.
Next, the forged blank undergoes precision machining using advanced CNC gear hobbing and shaping technology, which ensures the gear’s teeth are cut with extreme accuracy. The tooth profile, pitch, and tooth spacing are machined to strict dimensional tolerances (±0.01 mm), ensuring perfect meshing with the crankshaft gear, camshaft gear, and timing belt/chain. After machining, the gear undergoes a series of surface treatment processes, including shot peening to remove surface burrs and improve surface roughness, followed by the anti-wear coating application and heat treatment to enhance hardness and wear resistance.
The final step in the manufacturing process involves rigorous quality control testing to ensure the 481H-1007070BA idler gear meets Chery’s strict performance standards. These tests include dimensional accuracy testing, hardness testing, wear resistance testing, fatigue testing, and rotational friction testing. Dimensional accuracy testing verifies that the gear’s overall dimensions, tooth profile, and bearing mounting hole are within the specified tolerance range, ensuring perfect fitment with the Chery Tiggo’s timing system. Hardness testing confirms that the gear’s surface and core hardness meet the required specifications. Wear resistance testing simulates long-term friction with the timing belt/chain, ensuring the gear does not experience excessive wear. Fatigue testing simulates continuous rotational stress, ensuring the gear maintains its structural integrity over its service life. Rotational friction testing ensures the gear rotates smoothly with minimal friction, reducing noise and energy loss. Only idler gears that pass all these tests are allowed to leave the factory, ensuring the 481H-1007070BA series delivers reliable performance and long service life in the Chery Tiggo.
3. Structural Composition & Key Design Features
The Chery 481H-1007070BA idler gear features a precision-engineered structural design, tailored to the specific requirements of the Chery Tiggo’s engine timing system and operating environment. Its structural composition is optimized to maximize wear resistance, ensure precise synchronization, facilitate easy installation and maintenance, and reduce noise, with key design features that address the unique challenges of automotive timing system idler gear operation. Unlike generic aftermarket idler gears, which often have a simplistic design with poor fitment and inadequate performance, the 481H-1007070BA idler gear incorporates multiple specialized features to ensure consistent performance, reliability, and durability.
One of the key design features of the 481H-1007070BA idler gear is its precision tooth profile design. The gear’s teeth are designed with a involute tooth profile, which ensures smooth meshing with the crankshaft gear, camshaft gear, and timing belt/chain. The involute profile minimizes friction and wear between the teeth, reducing noise and extending the service life of the gear and adjacent components. The tooth width is optimized to ensure sufficient contact area with the timing belt/chain, distributing the load evenly and preventing localized wear or damage. Additionally, the teeth are chamfered at the edges to prevent damage to the timing belt/chain during installation and operation.
The 481H-1007070BA idler gear is designed with a integrated bearing mounting structure, which ensures the bearing is securely fixed in the center of the gear. The bearing mounting hole is precision-machined to ensure a tight fit with the bearing, preventing axial or radial movement during rotation. This design ensures the gear rotates smoothly and stably, maintaining precise alignment with the timing belt/chain and other components. The bearing is also equipped with a high-temperature-resistant rubber seal, which prevents the entry of dust, oil, and other contaminants, protecting the bearing from damage and ensuring long-term reliable operation.
Another critical design feature of the 481H-1007070BA idler gear is its lightweight yet rigid structural design. The gear’s body is optimized to reduce weight while maintaining structural rigidity, reducing the overall load on the timing system and improving fuel efficiency. The gear’s outer contour is streamlined to avoid interference with other engine components, ensuring seamless integration with the Chery Tiggo’s engine bay. Additionally, the gear is designed with a balanced weight distribution, reducing rotational vibration and noise, and ensuring smooth operation even at high rotational speeds.
The 481H-1007070BA idler gear also features a wear-resistant surface coating on its teeth, which further enhances its durability and reduces friction. The tungsten carbide coating is applied using a thermal spray process, ensuring a uniform, high-adhesion coating that can withstand high temperatures and constant friction. This coating not only extends the service life of the idler gear but also reduces the wear on the timing belt/chain, lowering maintenance costs and improving the overall reliability of the timing system.
Additionally, the 481H-1007070BA idler gear is designed with clear mounting marks, which facilitate easy installation and alignment. The mounting marks ensure that the gear is installed in the correct position, maintaining precise synchronization with the crankshaft and camshaft. This design simplifies the installation process for professional technicians and reduces the risk of installation errors, which can lead to timing system misalignment and engine damage.
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