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Key Factors to Extend the Service Life of Micro DC Motors

July 2, 2025

Micro DC motors are widely used in household appliances, smart devices, medical instruments, and more. Extending the motor’s service life not only helps reduce maintenance costs but also improves overall product performance and reliability. As a micro motor manufacturer with 20 years of design and production experience, Lihua Motor summarizes three core factors affecting motor lifespan: material selection, regular maintenance, and operating environment. Here are our professional recommendations:


1. Control from the Source: Choose Durable Wear-Resistant Materials

  • Optimized Brush Materials
    We recommend using graphite carbon brushes filled with metal powder. These brushes offer excellent conductivity and wear resistance, effectively extending the lifespan of the commutator and reducing brush wear.

  • Upgraded Commutator Materials
    Compared with traditional pure copper or copper-silver alloys, high-hardness alloy commutators have lower friction coefficients, significantly reducing wear during operation and enhancing overall motor durability.

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Precious Metal Brush Long-life time carbon brush


2. Pay Attention to Details: Follow Proper Maintenance Procedures

  • Regular Cleaning and Tightening
    Periodically clean dust from the motor surface, check the tightness of wiring screws, and clean the contact surfaces between brushes and commutators to maintain stable electrical contact and prevent overheating.

  • Proper Bearing Lubrication
    Add lubricating grease to the bearings at appropriate intervals to ensure smooth rotation and reduce friction and noise.

  • Enhanced Insulation Inspection
    For motors that have been stopped for more than 3 days or after maintenance, it is recommended to perform insulation testing and drying treatment if necessary to ensure safe operation upon restart.

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3. Optimize Environment and Operation to Delay Aging

  • Temperature Control
    The operating temperature of micro motors should be kept within the rated range to avoid internal material degradation or structural deformation caused by overheating.

  • Corrosion Protection
    In humid or corrosive environments, protective coatings or sealing treatments should be applied to prevent rust and corrosion of components.

  • Reduce Operating Impact
    Avoid frequent start-stop cycles to minimize mechanical fatigue; use soft starters or frequency converters for gentle motor startup, reducing the impact of startup current and slowing motor wear.

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Lihua Motor: Your Trusted Micro Motor Expert

We provide high-quality micro motors certified by CE, ROHS, IATF 16949, ISO 9001, and offer customized solutions to help every product achieve higher performance and longer service life.

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Jailyne (Ms.)
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