Rotor Balance Weight

The core function of HAWEN Rotor Balance Weight is to balance the mass distribution of motor rotors, thereby reducing or eliminating vibration and noise generated during rotation and ensuring the stable and reliable operation of motors. We optimize the design and customize the shape and angle of fan impellers according to different application scenarios for tailored performance.

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 various motor spare parts. The core function of motor counterweights is to balance the mass distribution of motor rotors, thereby reducing or eliminating vibration and noise generated during rotation and ensuring the stable and reliable operation of motors. 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 to washing motors and universal motors, with core customers including Nidec, Midea, Haier and other renowned enterprises.

Technical Parameters: Brass Counterweight

Core Advantages

Strong Manufacturing Resources

HAWEN possesses comprehensive automated production facilities, including 10 fully automated production lines, supported by automated surface cleaning and black oxide treatment lines. Complete hardware resources ensure production continuity and large-volume stability, providing customers with reliable product supply.

High-Precision Machining Capability

Critical machining processes are completed using high-precision automated equipment, with key dimensions consistently controlled, including inner bore tolerance ≤0.005 mm. Automated processing reduces human intervention, ensuring high consistency across production batches.

End-to-End Quality Assurance

Quality control starts from raw material sourcing with strict consistency management. During production, online inspection systems monitor key process parameters in real time, allowing immediate deviation correction. The process yield rate remains stable at 99.995%, with 100% outgoing inspection, ensuring customers receive reliable and consistent products.

Environmentally Compliant Manufacturing

Materials and processes comply with international environmental standards. Products use 1215 low-carbon free-cutting steel to reduce harmful substances. Surface treatment is fully automated to avoid manual contamination, enhance corrosion resistance, and reduce waste. All products meet ROHS, REACH, and other environmental certifications.

Custom Design Capability

HAWEN provides special-shaped and customized designs based on customer industrial systems and application requirements. Early engineering involvement helps reduce later modifications and repeated testing, ensuring high compatibility with customer systems and improving project efficiency.

Flexible Capacity and Delivery Assurance

HAWEN’s total monthly capacity reaches approximately 5 million units. Current monthly shipments are 3–4 million units, leaving 40%–60% flexible capacity. Adequate capacity redundancy ensures quick response to market changes and project scaling.

Regional Supply Chain Advantage

Based in Zhejiang Province, China’s key manufacturing hub, HAWEN maintains long-term partnerships with mature suppliers. Short procurement lead times and stable supply enhance delivery efficiency and allow flexible design adjustments.

Demonstrable Customer Value

Through automated manufacturing, precision machining, stable quality, and customization services, HAWEN helps customers reduce R&D, testing, manufacturing, and after-sales costs while achieving low-noise operation, high qualification rates, and environmental compliance. Choosing HAWEN ensures reliable, predictable long-term value.

Material Selection

Brass is an alloy mainly composed of copper and zinc, whose performance can be adjusted by modifying the zinc content and adding other alloying elements.Its microstructure changes with the zinc content:

● Single-phase brass is formed when the zinc content is below 35%;

● Duplex brass (α+β) is formed when the zinc content ranges from 36% to 46%;

● β brass is formed when the zinc content exceeds 46%.

In terms of mechanical properties, zinc content has a significant impact on the strength and plasticity of brass:The tensile strength (σb) and elongation (δ) of brass increase with the rise of zinc content; the strength of duplex brass (α+β) keeps rising when the zinc content is below about 45%, and drops sharply after that due to the appearance of brittle phases, while its plasticity decreases continuously with the increase of zinc content. Brass with high hardness and brittleness cannot be subjected to plastic working.

In terms of machinability, brass (e.g., H96 to H65) features good plasticity and can undergo hot and cold working.

Process Control

The core quality requirement for counterweights is weight control with a tolerance of ±0.5g, which places extremely high demands on stamping mold design and process stability of stamping equipment. Such a precise tolerance range requires top-tier performance of processing equipment (e.g., stamping machines, mold design), 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: The core function of motor counterweights is to balance the mass distribution of motor rotors, thereby reducing or eliminating vibration and noise generated during rotation and ensuring the stable and reliable operation of motors. During the manufacturing or use of motor rotors, uneven mass distribution is likely to occur due to material inhomogeneity, machining errors, component wear and other factors, leading to center of mass offset. When the rotor rotates at high speed, this imbalance will generate centrifugal force, causing obvious vibration and noise, which not only reduces motor efficiency, but also accelerates the wear of bearings and other components and shortens service life. Counterweights offset this imbalance through additional counterweight, making the rotor's center of mass closer to the rotational axis and effectively suppressing vibration. In practical applications, counterweights can significantly improve the stability and safety of motor operation, reduce noise interference and extend the service life of key components, thus playing a crucial role in industrial motors, home appliances, new energy vehicles and other fields.

Surface Treatment

Counterweights operate in the harsh internal environment of motors and are prone to corrosion after long-term use. 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. Appropriate surface treatment is applied with 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 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.