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Motor Brush Holder

Simo Motor Brush Holder

The Simo Motor Brush Holder is an essential electrical component for DC motors and certain AC motors, designed to secure and guide the brushes in contact with the commutator or slip ring. Made of high-strength insulating materials and wear-resistant construction, it ensures stable brush contact under high-speed rotation and heavy-load operation, guaranteeing reliable motor performance and efficient current transmission.

The brush holder features a compact, high-temperature and wear-resistant structure, suitable for various Simo DC motors, synchronous motors, and industrial motor systems. Its design facilitates easy maintenance and replacement, enhancing overall motor reliability and service life.

  • High-strength insulating material, resistant to heat and wear

  • Ensures stable brush contact with commutator or slip ring

  • Suitable for DC motors and industrial motor systems

  • Easy installation and maintenance, strong compatibility

  • Improves motor efficiency and service life

Applications: Simo DC motors, synchronous motors, and industrial equipment motors’ current transmission and commutation systems.

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Excerpt:

The motor brush holder is a critical component that securely holds brushes in place to ensure efficient electrical contact with the commutator. It contributes to smooth motor operation, stable performance, and extended motor lifespan.

SIMO Motor Brush Holders: Exceptional Performance and Long-Lasting Stability


01 Product Overview: Key Component for Reliable Motor Operation

SIMO Motor brush holders (also known as brush grips) are critical components designed for AC and DC motors, ensuring stable electrical contact between brushes and commutators or slip rings. By applying consistent spring pressure, brush holders maintain reliable current transfer between stationary and rotating parts. The quality of the brush holder directly affects motor efficiency, operational stability, and lifespan.

Manufactured with premium materials and precision engineering, SIMO brush holders feature robust structures, stable pressure, and easy installation. They are widely used in metallurgy, power generation, cranes, traction motors, and industrial machinery.

西玛电机刷架
西玛电机刷架

02 Core Technical Features

1. Optimized Structural Design

  • Brush Slot Section: Secures carbon brushes in place with precision machining for accurate dimensions.
  • Pressure Mechanism: Applies controlled pressure to prevent brush vibration during operation.
  • Frame Section: Connects the brush slot and pressure mechanism to form a stable load-bearing system.
  • Mounting Base: Firmly attaches the brush holder to the motor, ensuring overall stability.

Tolerance Standards: Brush slot bore radial tolerance H7, axial tolerance H11 for optimal commutator or slip ring contact.

2. Premium Material Selection

  • High-Strength Materials: Bronze castings, aluminum, and advanced composites withstand mechanical stress.
  • Excellent Machinability: Ensures precise and consistent part fabrication.
  • Corrosion Resistance: Suitable for harsh industrial environments.
  • Efficient Heat Dissipation: Reduces operating temperature for longer life.
  • Stable Conductivity: Ensures reliable current transfer.

3. Precision Manufacturing Process

  • Multi-Bore Processing: Ensures coaxiality with multi-tool machining, maintaining tolerances ≤0.36mm.
  • Surface Treatment: Ni, Zn, Cr, copper plating, chemical oxidation, or acid pickling to suit operational environments.
  • Quality Control: Eliminates burrs or sharp edges that may cause electrical discharge in humid conditions.

03 Performance Advantages

1. Stable and Reliable Operation

  • Ensures brushes maintain consistent contact for smooth motor performance under various conditions.
  • Simplifies maintenance with easy brush insertion and removal.
  • Adjustable brush protrusion prevents damage to commutators or slip rings.

2. Optimized Pressure Control System

  • Metallurgy, Power, Crane Motors: 0.15–0.35 Kg/mm²
  • Traction Motors: 0.3–0.4 Kg/mm²
  • Pressure consistency across all brush holders ≤10%, ensuring even current distribution.

3. Long Service Life

  • Precision springs and pivot mechanisms ensure smooth operation without sticking.
  • Robust riveted joints prevent component detachment.

04 Application Fields

1. Heavy Industry

  • Metallurgy: Rolling mills, smelting equipment.
  • Power Generation: Generator sets, auxiliary motors.
  • Cranes: Bridge cranes, gantry cranes, lifting mechanisms.

2. Transportation

  • Traction Motors: Electric locomotives, urban rail transit.
  • Electric Vehicles: Motors for various electric transport vehicles.

3. Industrial Manufacturing

  • Machine Tools: Industrial processing machinery.
  • Pumps: Industrial water pumps, hydraulic systems.
  • Compressors: Air compressors, refrigeration compressors.

05 Technical Specifications

Parameter CategoryTechnical Specifications
Brush Slot Bore ToleranceRadial H7, Axial H11
Surface RoughnessRa3.2–Ra1.6 (special requirements up to Ra0.8)
CoaxialityMulti-bore tolerance ≤0.36mm
ParallelismBrush holder fixed face to slot centerline ±0.2mm
PerpendicularitySlot bottom face perpendicularity ≤0.25mm
Pressure RangeStandard motors: 0.15–0.35 Kg/mm²; Traction motors: 0.3–0.4 Kg/mm²

06 Installation & Maintenance

Installation Guidelines

  • Ensure brush holder fixed face is parallel to slot centerline within ±0.2mm.
  • Maintain slot bore bottom perpendicular to sidewalls and fixed face ≤0.25mm.

Maintenance Tips

  • Regular Inspection: Monitor pressure consistency.
  • Brush Wear Monitoring: Replace brushes as needed.
  • Pressure Adjustment: Adjust spring tension to prevent sparking caused by spring fatigue.

07 Fault Diagnosis & Solutions

  • Sparking: Check and adjust spring pressure.
  • Uneven Brush Wear: Ensure brush holder pressure uniformity ≤10%.
  • Abnormal Vibration: Inspect brush holder fixation and component integrity.

08 Service & Support

  • Technical Consultation: Professional selection guidance and technical advice.
  • Installation Support: Detailed installation manuals and on-site guidance.
  • After-Sales Guarantee: Full quality assurance and service support.
  • Technical Assistance: Help troubleshoot operational issues.

SIMO Motor brush holders combine precision craftsmanship, stable performance, and long service life, making them the ideal choice for various industrial motors. Choosing SIMO brush holders ensures reliable motor operation, reduced maintenance costs, and enhanced equipment performance, backed by advanced technology and rigorous quality control.

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Simo Motor After-Sales Service Policy: Quality First, Customer Foremost

Sincere, Attentive, Dedicated — Simo Always Cares


Preface

Thank you for choosing Simo Motor products. As a company with many years of experience in motor manufacturing, Simo Motor always adheres to the principle of "Quality First, Customer Foremost." Through a comprehensive service system, we ensure that every customer enjoys efficient and professional after-sales support.

Our products have repeatedly been awarded provincial, municipal, and national honors such as “High-Quality Product,” “China Famous Brand Product,” “National Exemption from Inspection Product,” and “China Well-Known Trademark.” To further enhance customer experience, we have formulated this after-sales service policy, aimed at providing comprehensive, prompt, and satisfactory service guarantees.


1. Quality Assurance Commitment

Simo Motor strictly implements full quality control in accordance with international standards, national standards, industry standards, and corporate standards:

  • All products are manufactured under the effective operation of the GB/T 19001-2008/ISO 9001:2008 Quality Management System, ensuring rigorous inspection from raw material intake to final product delivery.

  • We guarantee that all products provided are brand new, unused, and meet the quality requirements stipulated in customer contracts.

  • We maintain a quality management system compliant with GB/T 19001-2000 idt ISO 9001:2000, ensuring its effective operation.


2. Pre-Sales Service

To help customers make the best choice, Simo Motor provides comprehensive pre-sales support:

  • Professional Technical Consultation: Responding to customer inquiries about motor products and technical issues.

  • Personalized Solutions: Objectively introducing Simo Motor product features and performance, and providing customized power solutions.

  • Comprehensive Product Information: Providing detailed quotations, drawings, and motor samples to help customers fully understand the product.


3. Ordering Instructions

To ensure the motor meets your usage requirements, please specify the following parameters when placing an order:

  • Basic Parameters: Motor model, rated power, rated voltage, number of poles, rated frequency.

  • Installation Environment: Protection level, cooling method, installation type, rotation direction, environmental conditions, cable exit position.

  • Usage Conditions: Installation altitude, working environment temperature, motor load type.

For special requirements, a separate technical agreement must be signed before placing an order. You may also call our customer service hotline 159-0292-3228 for professional guidance.


4. Warranty Policy Details

1. Warranty Period

Simo Motor provides a warranty of up to two years from the shipping date. Within this period, if the motor is damaged or cannot operate properly due to manufacturing defects, Simo Motor will repair or replace parts or the motor free of charge.

2. Warranty Coverage

  • The warranty covers product quality issues caused by our company, with free replacement of parts or free repair.

  • Warranty services require correct use and regular maintenance, following the original operation manual and recommended lubrication, cleaning, and care instructions.

3. Exclusions from Warranty

The following are not covered by the warranty:

  • Damage caused by non-designated personnel

  • Unauthorized modifications or self-repair

  • Use of non-official parts or software

  • Failure to follow operation manual instructions for use, handling, and maintenance

  • Damage caused by natural disasters (wind, fire, flood, earthquake, etc.)

  • Normal wear and tear under standard use


5. Post-Warranty Service

After the warranty expires, Simo Motor continues to provide service support:

  • Lifetime Paid Service: After the warranty period, if the product fails, we offer lifetime paid service, supplying consumable parts and components at cost price.

  • Regular Follow-Up: Our after-sales staff will periodically contact users to check product status and address potential issues.

  • Professional Repair Services: The company undertakes repair services for all types of motors, whether under warranty or not, providing professional maintenance and inspection.


6. Service Commitment and Standards

Simo Motor upholds the "Sincere, Attentive, Dedicated — Simo Always Cares" Three-Heart Service Philosophy, ensuring excellent customer experience through standardized service processes:

  • Professional Service Team: A dedicated team provides installation guidance, fault diagnosis, and repair services, ensuring efficient motor operation.

  • Rapid Response Mechanism: After receiving customer feedback, our after-sales team responds promptly and formulates quick solutions.

  • Full Tracking and Records: All service processes are documented to ensure traceability and continuous improvement of service quality.


7. Customer Complaint Channels

If you are not satisfied with Simo Motor’s services, please provide feedback through the following channels:

  • Direct complaints to the service department or headquarters

  • Call our customer service hotline: 159-0292-3228

We take every feedback seriously and continuously strive to improve our service quality.


Conclusion

Simo Motor will continue to provide high-quality products and professional after-sales service. Through a complete service system, we solve your concerns and ensure peace of mind. We firmly believe that only with customer success can Simo Motor grow. Choosing Simo Motor means choosing quality and trust.

Simo Motor — Dedicated Service, Creating the Future Together!

Simo Motor Brand Advantages: Outstanding Quality, Leading Innovation and Development in the Motor Industry

Over 60 Years of Professional Experience, Setting the Benchmark in the Motor Industry


Brand Heritage and Strength

Simo Motor (formerly Xi’an Motor Factory) was established in 1955. As one of the leading enterprises in China’s motor industry, it has over six decades of manufacturing experience and technical expertise. Today, the company has grown into a large-scale modern enterprise integrating motor product R&D, manufacturing, and sales. Its products are widely used in key sectors such as power, coal, petroleum, mining, metallurgy, railways, transportation, chemical, agriculture, water conservancy, and aviation.

With profound technical expertise and continuous innovation, Simo Motor has built a prestigious brand image in the motor industry. Its products are exported to more than 40 countries and regions, including North America, Europe, the Middle East, Southeast Asia, Africa, and Australia, earning trust and praise from global customers.


Core Technology Advantages

1. Leading R&D and Innovation Capability

Simo Motor treats technological innovation as the core driving force of enterprise development:

  • Professional R&D Team: Composed of senior engineers and technical experts focusing on cutting-edge motor technology research and applications.

  • Continuous Investment in Technology: 5%-7% of annual sales revenue is invested in R&D to ensure continuous innovation and product upgrades.

  • Patented Technology Achievements: Over 100 national patents, with multiple products receiving national and provincial science and technology progress awards.

  • Industry-Academia Collaboration: Strategic partnerships with renowned universities and research institutes to advance motor technology development.

2. Excellent Product Quality System

Simo Motor has established a robust quality assurance system to ensure each motor meets the highest standards:

  • International Certifications: ISO9001 Quality Management, ISO14001 Environmental Management, and OHSAS18001 Occupational Health and Safety certifications.

  • Strict Quality Control: 68 rigorous inspection processes from raw material procurement to final product delivery to ensure zero defects.

  • Advanced Testing Equipment: Equipped with international motor performance testing systems, vibration analyzers, noise measurement devices, and more.

  • Continuous Quality Improvement: Comprehensive feedback mechanisms for continuous optimization of production processes and product stability.


Product Advantages and Features

1. High-Efficiency Energy-Saving Technology

Simo Motor actively responds to national energy-saving policies with a series of high-efficiency products:

  • High-Efficiency Motor Series: Meets the national GB18613-2020 energy efficiency standards, with some products reaching IE4/IE5 ultra-high efficiency levels.

  • Energy-Saving Technology: Uses premium silicon steel, low-loss bearings, and efficient cooling systems to reduce operating energy consumption.

  • Intelligent Control Technology: Advanced variable frequency control systems optimize motor operation, improving energy savings by 15%-30%.

2. Outstanding Performance

Simo Motor products are known for high reliability, long service life, and low maintenance costs:

  • Powerful Output: Optimized electromagnetic design ensures high starting torque and strong overload capability.

  • Low Vibration and Noise: Dynamic balancing and noise reduction technologies ensure vibration and noise levels below national standards.

  • Strong Environmental Adaptability: Designed for harsh conditions with heat resistance, moisture-proof, and corrosion-resistant features.

  • Long Lifespan Design: Key components use specialized treatment and premium materials, with a design life exceeding 100,000 hours.

3. Comprehensive Product Series

Simo Motor provides a wide range of products to meet diverse customer needs:

  • High-Voltage Motors: Voltage levels of 6kV, 10kV, and power range 200–10,000 kW.

  • Low-Voltage Motors: Series such as YX3, YE3, YE4, with power range 0.55–1,000 kW.

  • Explosion-Proof Motors: Certified for use in flammable and explosive environments.

  • Special Motors: Customized for industries such as mining, metallurgy, and marine applications.

  • Non-Standard Customization: Strong ability to provide tailored solutions according to customer requirements.


Service System Advantages

Simo Motor has established a comprehensive customer service system:

  • Pre-Sales Technical Support: Professional selection guidance, solution design, and product demonstration.

  • In-Sales Support: Strict contract compliance, on-time delivery, and installation guidance.

  • After-Sales Guarantee: 24-month warranty, 24/7 technical support, 48-hour on-site service commitment.

  • Lifetime Maintenance Support: Customer equipment files maintained for full lifecycle service.


Industry Application Advantages

Simo Motor has extensive experience across key industries:

  • Power Industry: Provides reliable motors for thermal, hydro, and nuclear power.

  • Coal Industry: Explosion-proof motors certified for coal mine safety.

  • Petrochemical Industry: Corrosion-resistant and explosion-proof motors for harsh environments.

  • Metallurgy: High-overload, high-temperature resistant motors meet specialized equipment needs.

  • Transportation: Customized motors for railways, urban transit, and ports.


Brand Honors and Certifications

Simo Motor’s excellent product quality and market performance have earned multiple honors:

  • China Famous Brand Product, National Exemption from Inspection Product, China Well-Known Trademark

  • High-Tech Enterprise, Provincial Enterprise Technology Center

  • Multiple provincial and ministerial-level science and technology awards

  • Credit-worthy and trustworthy enterprise, AAA-level quality reputation


Conclusion

Choosing Simo Motor means choosing reliable quality, leading technology, and comprehensive service support. Over 60 years of professional accumulation have given Simo Motor deep technical expertise and rich industry experience, providing customers with the best motor products and complete power solutions.

In the future, Simo Motor will continue to adhere to the philosophy of “Quality First, Innovation Driven, Customer Foremost”, constantly improving product technology and quality, creating greater value for customers, and contributing to the development of China’s motor industry.

Simo Motor — Powerful, Efficient, and Fully Supported!

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