Micro motors serve as the core drive components in modern smart devices, widely used in household appliances, medical instruments, automotive electronics, wearable technology, and robotics. A high-performance, long-lifespan micro motor relies heavily on precise structural design and rigorous manufacturing processes.
This article outlines the entire production process of micro motors, based on practical experience from Guangdong Lihua Mechatronics Co., Ltd., a leading OEM/ODM manufacturer specializing in micro DC motors.
High-quality raw materials are essential for stable and efficient micro motor performance. Main materials include:
Enameled copper wire (or copper-clad aluminum): for winding coils with excellent conductivity and heat resistance
Silicon steel laminations: used for stator/rotor cores, featuring low core loss and high magnetic permeability
Shafts, bearings, end covers, stainless steel housings and other structural parts
Permanent magnets (NdFeB or ferrite): for magnetic field generation in brushed or brushless motors
Insulating plastics, varnish, heat-shrink tubing, etc.: for electrical safety and durability
All materials comply with international standards such as ROHS, REACH, and CE, and are tracked by batch for full quality traceability in OEM production.
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The stator and rotor cores are key components that affect efficiency, startup performance, and temperature rise. Processing includes:
Stamping or laser cutting of silicon steel sheets to create precise core laminations
Stacking and riveting/welding of laminations into complete core assemblies
Stress-relieving annealing treatment to enhance magnetic properties and reduce mechanical noise
At Lihua Motor, automated punching and lamination machines ensure consistency, providing a solid foundation for high-volume production of brushed and brushless micro motors.
The insulation system directly impacts the motor's reliability, safety, and lifetime.
High-temperature plastic bobbins (e.g., PBT, PA66) replace traditional insulation paper for slot insulation, ensuring consistent automated winding and high mechanical strength
Vacuum Pressure Impregnation (VPI) or dip coating with motor-grade insulating varnish boosts insulation class (F or H), and improves moisture and heat resistance
Lead wire protection with heat-shrink tubing ensures secondary insulation and prevents electrical shorting
These processes are standard in 1V to 36V micro motor manufacturing and help meet safety requirements for home appliances, medical, and automotive applications.
Winding is the most critical process in micro motor manufacturing:
Automatic coil winding machines ensure uniform tension and clean coil arrangement
Rotor winding (for brushed motors) and stator winding (for brushless motors) based on motor type
Customized winding parameters (turns, wire diameter, layers) to meet client requirements on voltage, current, and speed
Optimized slot fill factor for higher power density and efficiency
Lihua Motor supports OEM micro motor winding in various diameters and configurations, tailored for each application.
Assembly ensures mechanical strength and electrical connectivity:
Commutator soldering for brushed motors; PCB assembly with Hall sensors, ICs for brushless motors
Magnet placement, shaft insertion, bearing mounting, housing assembly, etc.
Automated assembly lines with dimensional accuracy up to ±0.02 mm
We offer full customization for shaft length, wire leads, rear housing, and more, to match your product's structural requirements.
To ensure smooth operation at high speed, motors undergo:
Dynamic balancing to achieve G1 to G2.5 balance grade per ISO standards
Magnetic field calibration to ensure uniform flux distribution and stable torque output
Air gap adjustment between rotor and stator for optimal efficiency and reduced noise
This is especially critical for high-speed products such as fan motors, smart lock motors, and vibration motors.
Every motor is tested for electrical and performance specifications:
No-load testing for speed, voltage, current, noise, and power
Stall current and start voltage testing, efficiency evaluation
Hall signal waveforms, polarity tests, and EMC compliance for brushless motors
Aging and thermal cycling tests based on customer standards
Lihua utilizes fully automated motor test benches to ensure 100% quality control. Test reports are available upon request.
All qualified motors are processed with:
Barcode tracking and labeling for batch traceability
Anti-vibration and anti-static packaging for secure global shipping
Customized labels and branding options for OEM clients
Final outgoing inspection and sampling checks for product consistency
As a professional micro motor manufacturer in China, Guangdong Lihua Mechatronics Co., Ltd. provides:
A team of 8 senior engineers and 10+ R&D specialists
Over 80% automated production lines, with daily output exceeding 60,000 units
Full technical support from motor selection to sample development and bulk delivery
Our motor types include:
Brushed DC micro motors (RF/RK-500,RF/RK-370 ,RF/RK-320,RS-360, RS-385, RS-550 series, etc.)
Brushless DC motors (BLDC)
Micro gear motors, planetary gear motors, and stepper motors
Integrated micro motor modules with wire harnesses, gears, or encoders
Interested in learning more about micro motor manufacturing, DC motor customization, or OEM/ODM cooperation? Get in touch with our team and let us build the right motor for your application.
Interested in learning more about micro motor manufacturing, DC motor customization, or OEM/ODM cooperation? Get in touch with our team and let us build the right motor for your application.
Website: www.dcminimotors.com /www.lihuamotor.com
Email: sell02@hcsmotors.com
Phone: +86 136 3159 9864
Factory Address: No.66,Chigang Road, Humen Town, Dongguan City ,Guangdong Province, China
