Aluminum Motor Casing

The Aluminum Motor Casing is an indispensable spare part for motor operation, and its performance and precision directly affect the service life of the motor and the user experience. We continuously optimize the selection of raw materials and precision manufacturing processes to ensure the durability and precision of the motor housing. We also keep improving the design and can customize different types of motor housings according to different application scenarios.

Product Specification

Product Application Fields

HAWEN (Trilon) is an enterprise with more than 20 years of deep engagement in the machinery industry. Since 2005, we have focused on the R&D and production of motor housings. Motor housings are widely and prominently applied in rail transit and new energy vehicles: for example, the drive motor housings of electric vehicles adopt aluminum profiles to achieve lightweight design, high thermal conductivity and sealing performance, while meeting the requirements of water cooling and moisture resistance; motor housings for rail transit equipment such as high-speed railways emphasize high-precision machining and vibration resistance to ensure reliability during high-speed operation.

In the home appliance industry, motor housings are commonly used in air conditioners, washing machines, vacuum cleaners and other equipment, usually made of ABS engineering plastic or steel materials to reduce costs while ensuring insulation performance. Motor housings for power tools are mostly made of plastic compression molding or steel structures to provide the necessary strength, dust and moisture resistance, and a certain level of flame retardancy.

Our products cover a wide range of industries, and are mainly dedicated to serving the small home appliance industry.

Product Application Equipment and Main Customers

The above products are mainly applied as motor housings and end covers, with core customers including Nidec, Midea, Haier and other renowned enterprises.

Technical Parameters: DC04 Low-Carbon Steel

Core Advantages

Manufacturing Model and Positioning

HAWEN is an industrial component manufacturer built around automated production and supported by engineering expertise. Its manufacturing system is designed for stability, consistency, and repeatability, ensuring reliable product performance in long-term, high-volume applications.

Engineering Involvement and Development Support

During the product development stage, HAWEN’s engineering team can participate early in customer projects. By evaluating industrial system requirements, structural design, material selection, and processing methods, HAWEN ensures solutions meet application needs while remaining suitable for mass production. Fast response helps shorten development cycles and reduce project risk.

Automated Production System

HAWEN operates 10 fully automated production lines, supported by an automated surface cleaning line and an automated black oxide treatment line. The highly automated workflow minimizes manual involvement and provides a solid foundation for stable delivery and scalable production.

Precision Machining and Consistency Control

All critical machining processes are performed using high-precision automated equipment. Core dimensional control remains stable, with key tolerances such as inner bore tolerance maintained at ≤0.005 mm. Automated execution and standardized processes ensure high consistency across production batches.

Process Quality Control Mechanism

Quality control begins at the raw material sourcing stage, where material origin and consistency are strictly managed. During production, online inspection systems monitor key process parameters in real time, enabling timely correction of deviations. The process yield rate remains stable at 99.995%, with 100% inspection before shipment.

Environmental Compliance and Manufacturing Control

HAWEN strictly follows environmental and regulatory requirements in 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 and Application Compatibility

Based on different customer industrial system structures and application conditions, HAWEN provides customized and special-shaped designs to ensure proper application fit and operational stability. Early engineering support helps reduce later modifications and repeated testing.

Capacity Planning and Delivery Capability

HAWEN’s total monthly capacity reaches approximately 5 million units. With current monthly shipments of 3–4 million units, 40%–60% capacity remains available. This capacity structure supports project scaling and rapid response to market demand changes.

Regional Manufacturing and Supply Chain Strength

Located in Zhejiang Province, one of China’s key manufacturing regions, HAWEN maintains long-term cooperation with mature local suppliers. Short procurement lead times and stable supply enhance delivery efficiency and support flexible customer requirements.

Customer-Oriented Value

Through its automated manufacturing system, stable quality control, and engineering support, HAWEN helps customers achieve cost efficiency, low-noise operation, high qualification rates, and environmental compliance. Choosing HAWEN reduces total costs across development, testing, manufacturing, and after-sales service throughout the product lifecycle.

Material Selection

DC04 is a low-carbon steel material mainly used for deep drawing processing.

Typical Chemical Composition

Carbon (C) ≤0.08%, Manganese (Mn) ≤0.4%, Phosphorus (P) ≤0.025%, Sulfur (S) ≤0.02%, Aluminum (Al) ≥0.015%.

Mechanical Properties

Its yield strength ranges from 130 to 210 MPa, tensile strength is not less than 270 MPa, and the percentage elongation after fracture is not less than 34% — these indicators reflect its excellent plasticity and formability.

Surface Classification & Formability

The surface quality of DC04 is divided into three grades:

● FB: Higher grade finished surface, minor defects that do not affect forming are allowed

● FC: High grade finished surface, no obvious defects on one side

● FD: Ultra-high grade finished surface, high appearance quality required on both sides

This surface finish ensures that the material is not prone to cracking or deformation during deep drawing, making it suitable for stamped parts with complex shapes.

Process Control

Ensuring high-precision assembly compatibility and performance places extremely high requirements on stamping die design, raw material selection and process stability. Such a precise tolerance range demands top-tier accuracy of processing equipment (e.g., CNC machine tools, die casting machines, mold control), high-quality cutting tools, stable process conditions and reliable fixtures (e.g., temperature control, vibration suppression); any minor deviation may lead to product quality defects.

We adopt advanced manufacturing processes to ensure this precision: realized 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: Maintaining low noise and excellent product performance at high motor speeds, the performance of raw materials and the precision of inner bore tolerance and geometric tolerance directly affect the fitting accuracy between the housing and the motor, 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 surface treatment processes to effectively enhance wear resistance and fatigue strength.

Surface Treatment

Motor housings operate in harsh working environments with high motor rotation speeds and extreme temperatures, which will inevitably cause rust and corrosion of spare parts 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 process for this product and adopted sand blasting for surface treatment, with no manual contact with products throughout the entire process. This 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 surface treatment methods such as electrophoresis and spray painting 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 stator cores. 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

We have established long-term strategic partnerships with domestic customers such as Sanjiang Electric, LG Tianjin, Nidec, Midea and Haier, with a stable cooperative relationship spanning more than a decade.