10–50mm Coreless Motors Brushed & Brushless Motor Solutions
BODENMOTION provides 10-50mm brushed and brushless coreless motors with customizable speed, torque, voltage, gearbox, and encoder options for robotics, medical devices, and precision automation systems.
Explore Coreless Motor Solutions by Topic
This page helps engineers, buyers, and OEM teams understand coreless motor technology, select the right motor configuration, evaluate application requirements, and develop customized motion solutions.
What Is a Coreless Motor and How Does it Work
Understanding the Structure, Working Principle, and Advantages of Coreless DC Motors
What Is a Coreless Motor?
A coreless motor, also known as an ironless motor or ironless DC motor, is a type of permanent magnet DC motor that uses a self-supporting cylindrical winding instead of a traditional iron-core rotor.
Unlike conventional iron-core motors, the rotor winding of a coreless motor does not contain laminated iron. This unique structure significantly reduces rotor weight and inertia, enabling faster acceleration, smoother rotation, and improved dynamic response.
Due to these characteristics, coreless motors are widely used in precision motion applications, including robotics, medical devices, laboratory instruments, and compact automation systems where fast response and accurate control are required.
How Does a Coreless DC Motor Work?
A coreless DC motor generates torque through electromagnetic interaction between the permanent magnets and the cylindrical winding rotor.
When current flows through the winding, electromagnetic forces generate rotational torque and drive the rotor to rotate.
Because there is no iron core inside the rotor, coreless motors eliminate magnetic cogging caused by the interaction between iron teeth and permanent magnets. This enables smoother operation and better control performance, especially in applications requiring:
- High-frequency start-stop cycles
- Low-speed motion control
- Precise positioning
Internal Structure
The defining feature of a coreless motor is the ironless rotor winding structure. Compared with traditional iron-core DC motors, this design reduces rotor inertia, minimizes cogging torque, and improves dynamic performance.
Key Engineering Advantages of Coreless Motors
Ultra-Low Rotor Inertia
Without an iron core, the rotor becomes significantly lighter, reducing mechanical inertia and enabling faster acceleration, quicker braking, and improved dynamic response.
High Power Density
The lightweight rotor design provides a high torque-to-weight ratio, delivering strong dynamic performance while maintaining a compact size for space-limited applications.
Fast Dynamic Response
The low-inertia rotor enables rapid response to control signals, making coreless motors ideal for frequent motion changes, precise positioning, and high-speed control applications.
Smooth Motion Without Cogging Torque
The ironless rotor structure eliminates magnetic cogging effects caused by iron teeth, providing smoother rotation, stable low-speed operation, and reduced vibration in precision motion systems.
Low Noise and Smooth Operation
The smooth electromagnetic design minimizes mechanical disturbance and vibration, making coreless motors suitable for sensitive medical equipment and precision instruments.
Excellent Control Performance
Low inductance and fast electrical response enable precise speed regulation, accurate servo control, rapid acceleration and deceleration, and stable motion performance in demanding applications.
Coreless Motor Types & Specifications
BODENMOTION offers a broad range of 10-50mm coreless motors, including precious metal brushed,carbon brush, and brushless designs. Compare motor technologies, typical performance ranges, and popular models to select the right configuration for your application.
Precious Metal Brushed Coreless Motors
Designed for precision applications requiring smooth operation, low electrical noise, high sensitivity, and excellent low-current performance.
Typical Applications
Medical instruments, optical equipment, laboratory devices, precision actuators, and miniature mechanisms.
Carbon Brush Coreless Motors
Designed for general applications requiring reliable operation, higher current capability, good durability, and competitive overall cost.
Typical Applications
Medical equipment, pumps, handheld devices, industrial instruments, and compact automation systems.
DC Brushless Coreless Motors
Designed for demanding applications requiring high efficiency, long service life, precise control, and strong dynamic performance.
Typical Applications
Robotics, humanoid robots, medical robots, precision automation, and aerospace systems.
| Coreless Motor Type | Rated Voltage (V) | Rated Speed (RPM) | Rated Current (A) | Rated Torque (mNm) | Diameter (mm) | Length (mm) | Weight (g) |
|---|---|---|---|---|---|---|---|
| Precious Metal Brushed Coreless Motor | 3–48 | 3,827–17,600 | 0.07–1.90 | 0.90–27.47 | 12–28 | 18–54 | 11.5–149 |
| Carbon Brush Coreless Motor | 6–48 | 1,606–18,590 | 0.19–12.09 | 2.71–196.86 | 16–40 | 25–71 | 24–485 |
| Brushless Coreless Motor | 5–48 | 4,463–79,640 | 0.10–32.65 | 0.32–668.79 | 10–50 | 18–100 | 8.5–837 |
Note: The values above represent the overall specification ranges across our coreless motor series. Actual rated performance varies by motor diameter, winding, voltage, and configuration.
Custom windings, shafts, gearboxes, encoders, and drive solutions are available for OEM applications.
Best-Selling Coreless Motors
Explore popular coreless motor models for precision motion, robotics, medical equipment, automation, and compact drive systems.
Precious Metal Brushed Coreless Motors
Graphite Brushed Coreless Motors
Brushless Coreless Motors
What Applications Use Our Coreless Motor Solutions?
Coreless motors are widely used in applications requiring compact size, low inertia, fast response, smooth operation, and precise motion control. Explore typical application areas and the key motor characteristics required for each system.
Robotics & Humanoid Robots
Coreless motors provide fast response, low rotor inertia, and precise motion control for robotic joints, humanoid robots, and compact actuator systems.
Typical Uses:
Robotic Joints · Dexterous Hands · Grippers · Compact Actuators
Key Requirements:
Fast Response · High Power Density · Precise Control
Medical & Surgical Equipment
Coreless motors deliver smooth operation, low noise, and reliable performance for precision medical devices and handheld surgical equipment.
Typical Uses:
Surgical Tools · Medical Pumps · Dental Devices · Diagnostic Equipment
Key Requirements:
Low Noise · Compact Size · Smooth Operation
Industrial Automation
Coreless motors support rapid acceleration, frequent start-stop cycles, and accurate positioning in compact automation systems.
Typical Uses:
Electric Grippers · Precision Actuators · Small Conveyors · Automated Mechanisms
Key Requirements:
Fast Acceleration · Reliable Operation · Precise Positioning
Aerospace & UAV Systems
Lightweight coreless motors provide high power density and dynamic response for weight-sensitive aerospace and UAV applications.
Typical Uses:
UAV Actuators · Gimbal Systems · Control Mechanisms · Miniature Drive Systems
Key Requirements:
Lightweight Design · High Power Density · Dynamic Response
Optical & Precision Instruments
Coreless motors provide smooth rotation, low vibration, and accurate positioning for optical and measurement systems.
Typical Uses:
Camera Systems · Optical Positioning · Scanners · Measurement Instruments
Key Requirements:
Smooth Motion · Low Vibration · Positioning Accuracy
Laboratory & Analytical Equipment
Coreless motors enable compact and controllable motion solutions for automated laboratory and analytical instruments.
Typical Uses:
Sample Handling · Miniature Pumps · Dosing Systems · Laboratory Automation
Key Requirements:
Compact Design · Speed Control · Reliable Operation
Different applications require different balances of speed, torque, noise, size, and service life. Coreless motor selection should always be based on the specific requirements of the final application.
Have an Existing Motor to Replace?
Send us the motor model, datasheet, drawing, or sample together with your actual operating conditions. We can evaluate a compatible coreless motor solution and identify the parameters that should be verified before replacement.
What Challenges Should Engineers Consider When Using Coreless Motors?
Coreless motors deliver high performance in compact systems, but engineers must consider key factors
that can impact motor performance, service life, and system reliability.
How Can Motor Overheating Be Prevented?
Coreless motors have limited thermal mass. Operating at high current or under heavy load for long periods can quickly increase temperature. Continuous torque, RMS current, duty cycle, and ambient temperature should therefore be evaluated together. Motor selection should be based on the actual continuous operating point rather than peak performance.
Why Does a Coreless Motor Struggle Under Load?
Selecting a coreless motor based only on no-load speed may result in insufficient torque at the actual operating point. Load torque, starting torque, operating speed, and acceleration requirements should therefore be evaluated together. Motor and winding selection should be based on the required torque-speed operating point rather than no-load performance alone.
How Do Frequent Start-Stop Cycles Affect Motor Life?
Frequent acceleration, braking, and reversing can increase RMS current, winding temperature, brush wear, and bearing stress in an ironless DC motor. Start-stop frequency, acceleration and deceleration rate, peak current, and reversing cycles should therefore be evaluated as part of the complete motion profile rather than under steady-state operating conditions alone.
How Do Radial and Axial Loads Affect Coreless Motor Life?
Excessive radial or axial loads on a coreless DC motor can increase bearing wear, vibration, and noise while reducing overall service life. Engineers should evaluate radial load, axial load, bearing type, shaft alignment, and coupling design to ensure external forces remain within the motor’s intended mechanical limits. Avoid using the motor shaft or bearings to support loads beyond their rated design.
Why Is the Motor Driver Important?
For a micro coreless motor, the correct motor driver is essential for stable operation, precise speed control, and efficient performance. Drive voltage, current limits, PWM frequency, and feedback settings should be matched to the motor’s electrical characteristics and actual operating conditions. Incorrect driver settings can cause excessive noise, overheating, unstable speed, or reduced motor life. For reliable performance, the coreless motor, driver, controller, and power supply should be evaluated as one complete drive system.
How Do Gearboxes and Encoders Affect Performance?
For a coreless motor, a gearbox increases output torque while reducing speed, while an encoder provides feedback for precise motion control. Gear ratio, backlash, encoder resolution, and output torque should be considered together. The motor, gearbox, and encoder should be selected as one complete drive system based on the final output requirements.
What Should Buyers Verify Before Ordering a Coreless Motor?
For OEM projects, the biggest sourcing risk is not simply choosing the wrong motor size. A sample may run successfully on the bench but still fail after integration because the actual load, thermal conditions, mechanical interface, control strategy, or production requirements were not fully defined. Before approving a coreless motor, buyers should verify the following engineering conditions.
One of the most common selection errors is comparing motors by rated voltage, no-load speed, or maximum torque without identifying the actual torque-speed operating point.
Once connected to a gearbox, pump, lead screw, robotic joint, or other mechanism, motor speed decreases and current increases with load. A motor that appears suitable from its no-load RPM may therefore operate too close to its current or thermal limit in the final system.
What buyers should verify:
Required RPM under load · Continuous torque · Peak torque · Operating current · Torque-speed curve
Procurement Risk:
A sample can appear functional during a short test while running outside the recommended continuous operating range, causing overheating or reduced service life later.
Better Approach:
Provide the actual load point instead of requesting only a motor with a specific voltage and RPM.
This is a very important purchasing pitfall.
Acceleration, startup, gripping, lifting, reversing, and overcoming static friction may require short-term peak torque that is much higher than the normal running torque. However, a motor capable of producing that torque briefly may not be able to sustain it continuously.
The buyer therefore needs to distinguish between continuous load and transient peak load.
What buyers should verify:
Continuous Torque · Peak Torque · Peak Duration · RMS Current · Duty Cycle
Procurement Risk:
Selecting by peak torque can result in a motor that meets the mechanical requirement but overheats during continuous operation.
Better Approach:
Define both the normal operating point and the worst-case transient condition.
A motor running continuously at 5,000 RPM is not equivalent to a motor repeatedly accelerating from 0 to 5,000 RPM, stopping, and reversing—even if both have the same rated speed.
Frequent acceleration and reversal increase peak current, winding temperature, brush wear, bearing stress, and driver demand.
For dynamic applications, the motion profile can therefore be more important than the nominal RPM.
What buyers should verify:
Start Frequency · Acceleration Time · Running Time · Stop Time · Reversing Frequency · Cycle Rate
Procurement Risk:
A motor may pass a continuous bench test but show excessive temperature rise or shortened life in repetitive start-stop operation.
Better Approach:
Provide one complete operating cycle, including acceleration, running, stopping, and reversing conditions.
Many prototype delays are caused not by motor performance, but by mechanical mismatch.
Motor diameter and length are only part of the interface. Shaft diameter, shaft length, flats, pinions, mounting holes, locating features, lead-wire direction, connectors, and gearbox dimensions can determine whether the motor can actually be integrated.
This becomes especially important once a custom shaft or winding has already been produced.
What buyers should verify:
Motor Diameter · Overall Length · Shaft Geometry · Mounting Interface · Connector · Gearbox Envelope
Procurement Risk:
An electrically suitable sample may still require redesign of the customer’s housing, coupling, PCB, or transmission mechanism.
Better Approach:
Confirm the mechanical drawing before customized samples are manufactured.
For many applications, the coreless motor should not be evaluated independently.
A planetary gearbox changes output speed and torque. An encoder introduces feedback resolution and control requirements. The driver determines current capability, PWM strategy, protection, and dynamic response.
The correct question is therefore not simply “Which motor do I need?”, but “What motor-drive-transmission combination delivers the required output?”
What buyers should verify:
Motor Winding · Gear Ratio · Gearbox Efficiency · Backlash · Encoder Resolution · Driver Current
Procurement Risk:
Selecting each component independently can create a system where the motor, gearbox, encoder, and controller are individually acceptable but poorly matched as a complete drive.
Better Approach:
Define the required output speed, output torque, positioning accuracy, and control method first, then configure the drive system backward from those requirements.
A motor tested in open air may behave differently after installation inside a compact enclosure.
Coreless motors have low rotor inertia and compact construction, but limited thermal mass also means operating current and heat dissipation must be considered carefully. Ambient temperature, enclosure ventilation, mounting structure, duty cycle, and nearby heat sources can all affect winding temperature.
What buyers should verify:
Ambient Temperature · Continuous Current · Duty Cycle · Enclosure · Cooling Conditions
Procurement Risk:
A motor that performs normally during an open-bench sample test may run significantly hotter after being enclosed in the final product.
Better Approach:
Validate temperature rise under the actual installation and duty-cycle conditions before mass production.
This is a particularly good B2B point to add because many motor websites do not discuss it.
For an OEM project, sample approval should not only answer “Does this motor work?” It should establish the configuration that will later become the production specification.
Winding, shaft, lead wire, connector, gearbox, encoder, and other customized details should be clearly defined before production approval.
What buyers should verify:
Winding Specification · Mechanical Drawing · Lead Wire · Connector · Gearbox · Encoder · Approved Configuration
Procurement Risk:
If the prototype configuration is not clearly frozen, later batches may require repeated clarification or additional engineering changes.
Better Approach:
Create an approved motor specification and drawing after prototype validation and before volume production.
This should be the final point because it directly addresses procurement.
For OEM buyers, the cheapest motor is not necessarily the lowest-cost solution. A small unit-price saving can be offset by shorter service life, additional driver requirements, mechanical redesign, inconsistent performance, or repeated sample iterations.
A meaningful supplier comparison should therefore include both technical suitability and production economics.
What buyers should verify:
Unit Price · Customization Cost · Tooling/NRE · Expected Life · Lead Time · MOQ · Production Consistency
Procurement Risk:
Optimizing only the motor purchase price can increase engineering, assembly, maintenance, and replacement costs at the system level.
Better Approach:
Compare suppliers based on the validated motor configuration and expected production requirements—not only the first sample quotation.
What Information HelpsEngineers Select the Right Coreless Motor?
Providing complete application requirements helps engineers select the right coreless motor configuration, reduce prototype iterations, and achieve reliable performance in real-world applications.
Project Information
Match the motor solution with your production requirements. Prototype quantity, annual volume, target lifetime, and development stage help determine the optimal motor configuration and customization approach.
Application Details
Understand the application before selecting the motor. Application function, load characteristics, performance targets, and special requirements help engineers recommend the most suitable coreless motor solution.
Electrical Requirements
Match the motor with your power supply and control system. The supply voltage, available current, and driver method determine the motor’s achievable speed, torque output, efficiency, and thermal performance.
Performance Requirements
Select based on the actual operating point, not maximum specifications. Required speed, continuous torque, and peak torque define whether a coreless motor can deliver stable performance under the real application load.
Motion Profile
Evaluate dynamic movement, not only continuous rotation. Acceleration, braking, reversing, and frequent start-stop cycles affect current demand, temperature rise, response time, and motor lifetime.
Mechanical Requirements
Ensure the motor fits the final mechanical structure. Motor diameter, length, shaft design, mounting method, and connector configuration should be confirmed before customized motor development.
Drive System
Consider the complete motion system, not the motor alone. Gearboxes, encoders, and drivers influence output torque, speed regulation, positioning accuracy, and overall system reliability.
Environment Conditions
Evaluate operating conditions for long-term reliability. Ambient temperature, installation space, cooling conditions, vibration, and special environments can directly affect motor performance and service life.
A successful coreless motor selection starts with understanding the complete operating conditions. Evaluating electrical, mechanical, motion, and environmental requirements helps avoid incorrect motor selection and improves reliability in the final product.
Developing a New Motion System?
Share your target voltage, speed, torque, duty cycle, installation space, control method, and expected production volume. Our engineers can help define a suitable motor configuration before prototype development begins.
How Does BODENMOTIONCustomize Coreless Motors for OEM Applications?
A standard coreless motor may not always match the real requirements of precision equipment. BODENMOTION engineers analyze the application load, motion profile, mechanical constraints, and control requirements to develop a customized motor solution from prototype validation to stable production.
Optimize Motor Performance for Real Operating Conditions
The motor must be designed around the actual working point, not only rated specifications. We adjust electromagnetic parameters to balance speed, torque, current consumption, and thermal performance.
Design Mechanical Interfaces for Direct Integration
A motor that performs well but cannot fit the equipment creates unnecessary redesign work. We customize mechanical structures to simplify installation and improve system reliability.
Build Complete Motion Solutions Beyond the Motor
Many applications require more than a motor alone. We combine coreless motors with gearboxes, encoders, and drivers to achieve the required output performance.
Validate Performance Before Mass Production
Prototype testing helps identify potential issues before they become production problems. Motors are evaluated under application-relevant conditions to confirm performance and reliability.
Convert Prototype Design into Stable Production
Successful OEM projects require consistent manufacturing, not only a working sample. Production processes are optimized to maintain repeatable performance during volume manufacturing.
Support Long-Term OEM Supply
For continuous production, customers need a reliable partner who can maintain quality, support improvements, and respond to future design changes.
BODENMOTION goes beyond modifying a standard motor model. We work with engineers to develop a coreless motor solution that matches the complete system requirement—from electromagnetic design and mechanical integration to prototype validation and production reliability.
How Does BODENMOTION Ensure Consistent Coreless Motor Quality?
A prototype that meets the target specification is only the beginning. For OEM projects, the greater challenge is maintaining consistent winding, electrical performance, dimensions, and assembly quality across repeated production batches. BODENMOTION controls critical manufacturing and inspection points from incoming components to final motor testing.
Precision Winding Control
Coreless winding directly affects resistance, current, torque, speed, and temperature rise. Controlled winding parameters help reduce motor-to-motor variation and maintain repeatable electromagnetic performance.
Critical Component Inspection
Windings, magnets, shafts, bearings, commutation components, and other critical parts are checked before assembly to reduce defects caused by material or dimensional variation.
Electrical Performance Testing
Key parameters such as voltage, current, speed, rotation direction, and other agreed performance requirements are verified to identify abnormal motors before shipment.
Mechanical & Dimensional Inspection
Shaft dimensions, motor diameter, overall length, mounting interfaces, and customized mechanical features are checked against approved drawings to support reliable equipment integration.
Prototype-to-Batch Consistency
Approved samples, drawings, specifications, and inspection criteria establish the production reference. Critical characteristics are controlled during repeat orders to reduce unnecessary batch-to-batch variation.
Final Inspection & Traceability
Final inspection records and production information provide a quality reference for each production batch, supporting OEM customers during incoming inspection, assembly, and long-term supplier management.
For an OEM buyer, quality is not whether one motor can pass a test—it is whether thousands of motors can remain within the agreed performance and dimensional limits. BODENMOTION builds production control around the approved motor specification to support repeatable batch quality and long-term supply.
Coreless Motor Ordering & OEM Support
Yes. Samples are available for prototype development, performance evaluation, and compatibility testing. For customized requirements, we recommend providing your voltage, speed, torque, dimensions, duty cycle, and application information before sample preparation.
There is no fixed MOQ for initial evaluation, and small quantities can be supplied for testing and prototype development. Pricing depends on the motor model, configuration, customization requirements, and order quantity. Volume pricing is available for production projects.
Yes. If you are replacing an existing motor, you can provide its model number, datasheet, drawing, performance requirements, or physical sample. Our engineers can evaluate compatible dimensions, electrical parameters, shaft configuration, mounting interface, and performance requirements.
Depending on the project, customization can include winding and voltage, shaft dimensions, motor leads, connectors, mounting interfaces, gearboxes, encoders, drivers, and other mechanical or electrical configurations. Feasibility is evaluated according to the application and production requirements.
Lead time depends on the level of customization. Standard or existing configurations can generally be prepared faster, while custom windings, shafts, mechanical interfaces, gearboxes, or encoders require additional engineering and production time. The estimated lead time is confirmed after the technical requirements are reviewed.
Yes. BODENMOTION provides quantity-based pricing for OEM and production projects. Please provide the required motor model or specification together with your prototype quantity, expected production quantity, and estimated annual volume for quotation.
This is a particularly good B2B point to add because many motor websites do not discuss it.
For an OEM project, sample approval should not only answer “Does this motor work?” It should establish the configuration that will later become the production specification.
Winding, shaft, lead wire, connector, gearbox, encoder, and other customized details should be clearly defined before production approval.
What buyers should verify:
Winding Specification · Mechanical Drawing · Lead Wire · Connector · Gearbox · Encoder · Approved Configuration
Procurement Risk:
If the prototype configuration is not clearly frozen, later batches may require repeated clarification or additional engineering changes.
Better Approach:
Create an approved motor specification and drawing after prototype validation and before volume production.
Samples and small orders can be shipped internationally by DHL, FedEx, or UPS Express. Larger production orders can be arranged by express, air freight, or sea freight depending on quantity, destination, delivery schedule, and customer requirements.
BODENMOTION accepts credit card, PayPal, and T/T bank transfer for coreless motor orders. Available payment options may vary depending on the order value and whether the order is for samples, customized motors, or volume production.
Yes. For customized projects, key mechanical specifications such as motor dimensions, shaft configuration, mounting interface, lead wires, gearbox, and encoder options can be confirmed before production. The approved specification or drawing serves as an important reference for sample preparation and subsequent production.
Depending on the motor and project, BODENMOTION can provide relevant technical information such as motor specifications, dimensional drawings, performance data, wiring information, and test results to support engineering evaluation and prototype verification.
Yes. If you are replacing an existing motor, provide the current motor specifications, drawing, operating voltage, speed, torque, dimensions, shaft details, duty cycle, and application conditions. Our engineers can evaluate suitable BODENMOTION models or determine whether a customized solution is required.
✓ Technical Content Reviewed by BODENMOTION Engineering Team
Based on BODENMOTION coreless motor specifications, application engineering experience, prototype evaluation, and production testing practices.
Looking for the Right Coreless Motorfor Your Application?
BODENMOTION combines production resources, testing support, and practical engineering follow-up to help OEM customers move more smoothly from evaluation to repeat-order supply.
What Can You Share With Us?
You do not need a complete motor specification to start. Share the application information you already have, and our engineers can help identify the remaining parameters required for motor selection.
- Supply voltage & available current
- Operating speed & required torque
- Motor diameter, length & shaft size
- Duty cycle, start-stop & reversing frequency
- Gearbox, encoder & control requirements
- Application, load & operating conditions
- Target lifetime & estimated annual volume
Discuss Your Coreless Motor Project
Tell us what the motor needs to do in your system. BODENMOTION can help evaluate motor size, winding, speed, torque, mechanical interface, gearbox, encoder, and control requirements for your application.