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Model | Rated Voltage (VDC) | Rated Speed (rpm) | Rated Torque (Nm) | Rated Current (A) | Rated Power (W) | Peak Torque (Nm) | Torque Constant (N.m/A) | Back EMF (Vs/kRPM) | Rotor Inertia (kg.mm²) | Body Length (mm) | Mass (kg) |
42BLF20 | 24 | 4000 | 0.063 | 1.65 | 26 | 0.185 | 0.043 | 3.2 | 4.6 | 40 | 0.3 |
42BLF40 | 24 | 4000 | 0.125 | 3.3 | 52 | 0.38 | 0.043 | 3.2 | 9.5 | 60 | 0.46 |
42BLF60 | 24 | 4000 | 0.185 | 5 | 78 | 0.55 | 0.043 | 3.2 | 13.5 | 80 | 0.65 |
42BLF80 | 24 | 4000 | 0.25 | 6.6 | 104 | 0.75 | 0.043 | 3.2 | 20 | 80 | 0.85 |
Parameter | Standard Specification |
Magnet Material | Bonded NdFeB |
Number of Poles / Phases | 8 / 3 |
Insulation Class | B |
Operating Temperature Range | -10℃ ~ 40℃ |
Standard Mounting | 4-M3 mounting holes (5mm effective depth) |
Max No-Load Speed | 5000 RPM |
Our 42mm brushless DC motor features a standard 42×42mm square end cap with a compact, standardized mechanical design for universal compatibility. The drawings below include detailed mechanical dimensions, phase winding wiring, and Hall sensor wiring details. Custom mounting dimensions, shaft design, and wiring harnesses are available upon request.
All technical drawings are optimized for Google image SEO, with descriptive alt text including 42mm bonded brushless DC motor mechanical dimension drawing, SLTBLF42 series BLDC motor Hall wiring diagram, and 42mm square BLDC motor mounting drawing to capture high-intent image search traffic from design engineers.
Circuit | Wire Color | Function |
Phase Winding | Yellow (YEL) | Phase U |
Phase Winding | Green (GRE) | Phase V |
Phase Winding | Blue (BLU) | Phase W |
Hall Sensor | Red (RED) | Power Supply (+V) |
Hall Sensor | Black (BLK) | Ground (GND) |
Hall Sensor | Yellow (YEL) | HU Signal |
Hall Sensor | Green (GRE) | HV Signal |
Hall Sensor | Blue (BLU) | HW Signal |
Our SLTBLF42 series 42mm bonded brushless DC motor is a high-performance, compact BLDC solution engineered for industrial automation, precision machinery, and global OEM applications. Built with premium bonded NdFeB magnets and precision winding technology, this 42×42mm square brushless DC motor delivers industry-leading efficiency over 90%, ultra-long service life, and stable performance even in demanding working conditions. Fully compatible with gearboxes, encoders, and brakes, our 24V 42mm BLDC motors support end-to-end customization to meet your unique project requirements, making them the ideal choice for equipment manufacturers, system integrators, and industrial suppliers worldwide.
This 42mm brushless DC motor adopts high-quality bonded NdFeB magnets and precision winding technology, achieving an efficiency rate of over 90%. It saves 20%-30% more energy compared to traditional brushed motors, which effectively reduces end-users' operational costs, extends battery life for portable equipment, and helps your products meet international energy efficiency standards.
The brushless design completely eliminates carbon brush wear, delivering a continuous service life of over 20,000 hours under standard working conditions. This greatly reduces maintenance frequency and unplanned equipment downtime for industrial production lines, a critical advantage for continuous automation systems and OEM equipment.
Equipped with a high-precision encoder and supporting PID closed-loop control, our 42mm BLDC motor achieves speed fluctuations of less than ±1% and consistent torque output across the entire operating range. This high level of control accuracy makes it perfect for precision machinery, valve control, and robotic applications that demand strict motion stability.
Optimized electromagnetic design and precision dynamic balancing calibration ensure the motor’s operating noise is kept below 50dB during full-load operation. This ultra-quiet performance is ideal for medical equipment, laboratory instruments, and indoor automation systems that require low acoustic interference.
With a standard 42×42mm square end cap and optimized body structure, this motor features a compact footprint that saves valuable installation space for your equipment. It is easy to integrate into compact mechanical designs, with standardized mounting holes for fast, hassle-free assembly.
To meet diverse project requirements across industrial applications, our 42mm bonded brushless DC motor is fully compatible with a wide range of auxiliary accessories, with full OEM/ODM customization support for your unique project needs.
Planetary gearboxes, spur gearboxes, and worm gearboxes for torque amplification
High-precision incremental encoders and absolute encoders for motion control
Electromagnetic brakes and holding brakes for safety stop requirements
Matched BLDC motor controllers and drivers for plug-and-play operation
Custom wiring harnesses, connectors, and mounting flanges
We provide end-to-end customization for industrial OEM projects, with a dedicated engineering team to support your design from prototype to mass production. Customizable parameters include:
Rated voltage, speed, torque, and power output
Body length, shaft diameter, and mounting dimensions
Insulation class, temperature resistance, and dust/water protection rating
Wiring configuration, connector types, and harness length
Integrated accessories and performance tuning for specific applications
Our 42mm bonded brushless DC motors are widely used in global industrial and commercial applications, thanks to their compact design, stable performance, and high customization flexibility. Key industries and applications include:
Collaborative robots, service robots, AGV/AMR systems, robotic arms, automated production line equipment, conveyor systems, and pick-and-place machinery.
Electric valves, ball valves, butterfly valves, flow control systems, pump drives, HVAC equipment, and water treatment automation systems.
CNC equipment, 3D printers, laboratory instruments, medical devices, packaging machinery, and labeling equipment.
Electric actuators, lifting equipment, solar tracking systems, automatic door operators, and industrial lifting platforms.
Sample Order: The standard MOQ for 42mm BLDC motor samples is 3 units, with a sample lead time of approximately 15 working days. Customized sample production is supported for OEM projects.
Bulk Production: Mass production lead time ranges from 20-30 working days, subject to order quantity and customization requirements.
Global Shipping: We support worldwide shipping via sea, air, and international express (DHL, FedEx, UPS, TNT) for both sample and bulk orders, with flexible shipping solutions to meet your timeline.
Payment Terms: Customized payment terms are available for long-term OEM partners and bulk orders, including T/T, L/C, and other secure payment methods.
Yes, we provide full OEM/ODM customization services for our 42mm bonded brushless DC motors. Our in-house engineering team can customize voltage, torque, speed, mechanical dimensions, mounting flanges, compatible accessories, and wiring harnesses to meet your exact project requirements. We support full-cycle support from prototype design to mass production.
The standard MOQ for samples is 3 units, with a production lead time of approximately 15 working days. For customized samples, the lead time will be confirmed based on your specific customization requirements.
First, if you are using a frequency converter, check the parameter settings to ensure the motor data matches the nameplate data. Second, inspect the motor bearings for wear and replace them if necessary. If the issue persists, please contact our technical support team for immediate assistance.
First, check the switching frequency of the motor's working mode, as excessive switching may cause motor overload. Second, verify that the motor power matches your application load requirements. If equipped with a brake, check the braking function for proper operation. For unresolved issues, reach out to our engineering team for professional troubleshooting.
Under standard operating conditions and proper maintenance, our 42mm brushless DC motor delivers a service life of over 20,000 hours. The brushless design eliminates carbon brush wear, significantly extending the motor’s lifespan compared to traditional brushed motors.
With decades of experience in R&D and manufacturing of brushless DC motors, we are a trusted professional supplier for global OEM clients, equipment manufacturers, and automation solution providers in the industrial automation industry.
Rigorous Quality Control: All our BLDC motors undergo 100% performance, noise, and lifespan testing before shipment, fully compliant with CE, RoHS, and international industrial standards to ensure consistent quality for every unit.
Professional In-House R&D Team: Our team of experienced motor engineers provides one-to-one technical support, from pre-sales model selection and custom design to after-sales troubleshooting, to solve all your technical challenges.
Flexible Production Capacity: We support both small-batch prototype customization and large-scale mass production, with a mature and stable supply chain to ensure on-time delivery and consistent product quality for every order.
Global Customer Support: We serve clients in over 50 countries and regions, with multilingual technical support and flexible shipping and payment solutions to streamline your global procurement process.
Ready to find the perfect 42mm bonded brushless DC motor for your project? Request a free custom quote or download the full technical datasheet today by contacting our sales team. We will respond to your inquiry within 24 working hours.
