Shenzhen HengDrive Technologies Co., Ltd. is one of the most reliable manufacturers and suppliers of external rotor brushless dc motor in China. With abundant experience, we warmly welcome you to wholesale bulk external rotor brushless dc motor made in China here from our factory. We also accept customized orders.
Products Description
Characteristic: CW or CCW, Signal function available, Locked rotor protection, Stepless speed regulation, Low noise, Low EMI, Long life 2000-10000hrs
Notice: Data in this typical specification sheet are for other certain customer. Voltage, rated torque, speed, current, power and shaft extension feature & dimension can be changed to meet customer specific requirement.
Outline Drawing
Unit: Millimeter
Performance Curve :
- B2813S-S01
- 14.4V
External rotor brushless DC motor
External rotor brushless DC motor Unlike conventional internal rotor motors, the external rotor design places the magnets on the outer shell, which directly drives the load. This configuration delivers exceptional torque output without requiring a gearbox, making it ideal for electric clippers, direct-drive fans, small pumps, and precision industrial tools.
External rotor brushless DC motor Key Technical Specifications
- Diameter: 60mm (rotor outer)
- Rated power: 50W – 150W
- Rated voltage: 12V, 24V, or 48V DC
- Rated torque: 0.25 N·m – 0.8 N·m
- Maximum speed: 4,500 RPM
- Minimum stable speed: 150 RPM (sensorless FOC control)
- Insulation class: F (155°C)
- Protection class: IP44 (standard); IP54 optional
Why External Rotor for Your Product?
Higher torque at low speed – Eliminates gearboxes, reducing noise, backlash, and mechanical failure points.
Slim profile – The hollow rotor shaft allows wires or mechanical linkages to pass through the motor center.
Excellent heat dissipation – Rotor shell acts as a fan impeller, pulling air through internal windings.
Quiet operation – No gear noise; electromagnetic noise suppressed by sinusoidal drive commutation.
Long life – No brushes, no wear items; rated for 20,000+ hours continuous operation.
Manufacturer Advantages
In-house magnetic design
We simulate and optimize Halbach or parallel magnet arrays for maximum torque ripple reduction (<3%).
Customization ready
Modify shaft diameter, mounting flange, hall sensor placement, or winding turns to match your voltage/speed requirements.
Integrated driver available
Pair with our field-oriented control (FOC) driver for sensorless speed control, closed-loop torque regulation, and CAN/RS485 communication.
Low MOQ
500 units for semi-custom; 2,000 units for full custom (including housing color and connector type).
Fast sampling
5–7 business days for sample motors from our Shenzhen engineering center.
Quality assurance
100% final testing: insulation resistance, dielectric strength, back-EMF waveform, vibration, and no-load current.
Certifications
- CE (EN 60034-1:2022, EN 55014-1) – motor safety and EMC for industrial and household equipment
- RoHS & REACH – compliant material declaration, no conflict minerals
- UL 1004-1 (motor safety) – file number E389214 (available upon request)
- ISO 9001:2025 – certified manufacturing facility with IATF 16949 process controls
- CCC (China Compulsory Certification) – for products sold into Chinese market
- IP44 / IP54 – dust and water splash protection (tested per IEC 60529)
- Optional: ATEX (for explosive environments), UKCA (UK market)
External rotor brushless DC motor Typical Applications
- Direct-drive electric clippers (zero gear noise, instant stop-start)
- Energy-saving ceiling fans and ventilation fans
- Small robotic joints and servo actuators
- Laboratory mixers and centrifugal pumps
- Agricultural drone propeller drives
Packaging & Logistics
- Each motor packed in individual ESD foam with desiccant.
- 50 units per carton (300 × 250 × 200 mm).
- Warehouse in Shenzhen and Hamburg. Express delivery available via DHL/FedEx (3–7 days globally).
Contact
Request the External rotor brushless DC motor datasheet (including torque-speed curves, thermal derating chart, and mechanical drawings). Our engineers provide free feasibility analysis within 24 hours. Upgrade your application to external rotor performance – more torque, less space.
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