Automotive Timing Pulley

HAWEN Automotive timing pulley is a mechanical component for timing belt transmission, which realizes precision power transmission through tooth meshing with timing belts. It features high transmission efficiency, low noise and simple maintenance. Our products are widely applied in automation equipment, precision machinery, industrial transmission and other fields. We welcome customers to customize products per drawings or visit our factory.

Product Specification

Product Application Fields

HAWEN (Trilon) has been deeply engaged in the machinery industry for more than 20 years. Since 2005, we have conducted in-depth R&D and production of timing pulleys for home appliance motors, automotive timing pulleys, AGV forklift timing pulleys and various types of timing pulleys. This product is precision-machined from 45# carbon steel, and our products are widely used in multiple industries:

1.Automotive Industry: Timing belts are widely applied in the transmission systems of key automotive components such as automotive engines, air conditioning compressors and generators. Automakers have stringent requirements for efficient, reliable and low-noise transmission systems.

2.Precision Manufacturing: Our products meet the demands for high-speed and high-precision transmission in 3C testing equipment and the semiconductor industry, improving equipment reliability.

3.Automation and General Machinery: Commonly used in CNC machine tools, printing machinery, textile equipment and other equipment to achieve multi-axis synchronous transmission.

Core Advantages: High precision, high energy efficiency and strong environmental adaptability

● Superior transmission precision: The tooth meshing design ensures no slip and a constant transmission ratio, making it ideal for scenarios requiring precise motion control.

● High efficiency & easy maintenance: Transmission efficiency reaches over 98% with remarkable energy-saving effects; no lubrication is needed, reducing maintenance costs.

● Stable and reliable operation: With excellent shock absorption and damping performance and low noise, it is suitable for environments with high requirements for quietness and stability.

● Strong adaptability: Supports long-distance transmission, and can adapt to harsh working conditions such as humidity and corrosion through surface treatments (e.g., zinc plating, high-frequency quenching).

Product Application Equipment and Main Customers

The above products are mainly applied to automotive generators, with the core customer being FAW.

Technical Parameters: Iron Timing Pulley

Competitive advantage

Engineering Capability Driven by Requirement Understanding

HAWEN engages with customers at an early project stage, analyzing industrial system architecture, operating conditions, and application objectives. By participating from a system-level engineering perspective rather than a single-component view, HAWEN ensures solutions meet performance requirements while remaining suitable for long-term operation and mass production.

Automation-Based Manufacturing Foundation

All products are built on a highly automated manufacturing platform. HAWEN operates 10 fully automated production lines, supported by an automated surface cleaning line and an automated black oxide treatment line. Critical machining processes are completed using high-precision automated equipment, with key tolerances such as inner bore tolerance consistently maintained at ≤0.005 mm, ensuring stable large-scale production.

Process Stability and Online Quality Management

Quality control begins at the raw material sourcing stage, where material consistency is strictly managed. During production, online inspection systems monitor critical parameters in real time, allowing immediate correction of deviations and minimizing variability caused by manual operations. The process yield rate remains stable at 99.995%, with 100% outgoing inspection for all products.

Environmental Compliance Integrated into Materials and Processes

Environmental compliance is embedded in both material selection and manufacturing processes. Products are manufactured using 1215 low-carbon free-cutting steel to reduce harmful substances. Surface treatment is performed through a fully automated black oxide process, preventing manual contamination while improving corrosion resistance and reducing waste. All products comply with ROHS, REACH, and other international environmental regulations.

Customization Supporting System-Level Applications

Based on different customer industrial system configurations, HAWEN provides customized and special-shaped designs to ensure proper system compatibility. Early engineering involvement reduces later structural modifications and repeated testing, helping customers shorten development cycles and lower total development costs.

Capacity Flexibility and Delivery Reliability

HAWEN’s total monthly capacity reaches approximately 5 million units. Current monthly shipments range from 3 to 4 million units, leaving 40%–60% flexible capacity available to respond quickly to demand growth and market changes. This capacity flexibility supports both project scaling and long-term supply stability.

Regional Supply Chain Responsiveness

Located in Zhejiang Province, China’s key manufacturing hub, HAWEN benefits from long-term cooperation with mature local suppliers. Short lead times for raw materials and components enhance delivery efficiency and provide greater flexibility for design and demand changes.

Result-Oriented Customer Value

Through automated manufacturing, stable quality, and efficient engineering support, HAWEN helps customers achieve cost efficiency, low-noise operation, high qualification rates, and environmental compliance. Choosing HAWEN means reducing total lifecycle costs across development, testing, manufacturing, and after-sales service.

Material Selection

45# carbon steel is a high-quality carbon structural steel with a carbon content of approximately 0.42% to 0.50%, belonging to the medium carbon steel category. Its material density is 7.85 g/cm³; its chemical composition includes 0.50%-0.80% manganese, 0.17%-0.37% silicon, with strictly controlled impurity elements such as phosphorus and sulfur.

Mechanical Properties & Heat Treatment

It has excellent comprehensive mechanical properties, with a tensile strength of not less than 600 MPa, a yield strength of not less than 355 MPa, an elongation of not less than 16%, and a reduction of area of not less than 40%. Due to its poor hardenability, it is prone to cracking during water quenching and has average weldability — preheating before welding and post-weld annealing are required to relieve internal stress. Quenching and tempering (quenching plus high-temperature tempering) in heat treatment can optimize its performance: the quenching temperature is usually about 840°C, the tempering temperature is 560-600°C, and the hardness can reach HRC 22-34.

Process Control

To maintain the operational stability of motors, customers have an extremely stringent requirement of ≤0.02mm for the face perpendicularity of timing pulleys, which places ultra-high demands on processing equipment and process stability. Such a precise tolerance range requires top-tier accuracy of machining equipment (e.g., CNC machine tools), high-quality cutting tools, and stable process conditions (e.g., positioning fixtures, vibration suppression); any minor deviation may lead to product quality defects.

We adopt advanced manufacturing processes to ensure this precision: the requirement is achieved through high-precision measuring instruments (e.g., Coordinate Measuring Machine (CMM), Roundness Tester, Profile Measuring Instrument), strict process control (e.g., Statistical Process Control (SPC)) and a stabilized machining environment, which guarantees batch production consistency.

Application Value: In precision transmission systems, inner bore tolerance directly affects the fitting accuracy between components and shafts, which is critical to transmission efficiency, noise control and product service life — it is a core technical indicator for high-end manufacturing.

We exercise strict quality control throughout the production process to ensure the stability and durability of products during use.

Material Performance Matching: Strictly control material hardness and heat treatment processes to effectively enhance wear resistance and fatigue strength.

Surface Treatment - Electrophoresis

As timing pulleys are made of metal materials and operate in harsh environments, they are inevitably prone to rust and corrosion without proper treatment. Our company has a professional and experienced core R&D team; through years of practical experience and repeated trials, we have developed a dedicated surface treatment formula for this product, and adopted fully automatic electrophoresis equipment integrated with a fully automatic drying system.

There is no manual contact with products throughout the entire process, which not only enhances the corrosion resistance of products to meet industry standards, but also reduces the risk of product collision caused by human contact and ensures the operational stability of products.

Other electroplating processes such as general electroplating, galvanizing and nickel plating are also available and can be fully customized according to customer requirements.

Environmental Requirements

All products meet strict environmental protection requirements in terms of raw material selection and surface treatment processes, and are supported by official ROHS and REACH certification reports.

R&D & Customization Capabilities

Our professional R&D and technical team has 20 years of in-depth industry experience. We can fully meet customer requirements, solve their technical pain points according to their specific application scenarios and demands, and customize special-shaped pulleys. We warmly welcome customization per provided drawings, including customized products with designated raw materials and surface treatment processes. We also extend a sincere invitation to overseas visitors to visit our manufacturing factory.

Synergy from the New Organizational Structure

The synergy brought by the new organizational structure enables HAWEN to fully meet customer expectations on the basis of in-depth and effective cooperation.

Domestic Customers & Market Share

We have established long-term strategic partnerships with domestic customers such as FAW and BYD, with a stable cooperative relationship spanning more than a decade. Up to now, our company has achieved a 50% market share of timing pulleys in the Chinese market.