Φ20mm Micro Joint Actuator

Description

Product Overview

The Φ20mm Micro Joint Actuator is a compact integrated motion module developed for robotics, precision instruments, medical devices, and intelligent equipment. With an ultra-compact size of just Φ20mm × 20mm, the flagship X20 series is designed for applications where installation space, torque output, and precise motion control are critical.

Featuring an innovative axial-flux motor architecture combined with a miniature cycloidal reduction mechanism, the X20 delivers over 30% higher torque density than conventional designs, according to the manufacturer's specifications. It provides continuous torque of up to 450 mNm and initial torque of up to 800 mNm, supporting responsive and controlled movement in space-constrained mechanical systems.

Developed by VAXOR, a Suzhou-based micro-drive technology company founded in 2024, this actuator integrates advanced motor design, miniature transmission technology, and precision feedback into a compact solution for next-generation robotic and intelligent devices.

Key Features and Advantages

1. Ultra-Compact Design

• Miniature Dimensions: Measures only Φ20mm × 20mm, supporting integration into compact robotic joints and precision mechanisms.

• Space-Efficient Architecture: Combines motor and reduction technologies in a compact motion module to simplify mechanical integration.

• Lightweight Construction: Weighs approximately 37.2–41.6 g, helping reduce the overall mass of moving assemblies.

• Flexible Integration: Suitable for applications with strict dimensional and weight constraints.

2. High Torque Density

• Axial-Flux Motor Technology: Uses an axial-flux architecture to achieve high torque output within a small installation envelope.

• Enhanced Torque Density: Offers over 30% higher torque density than conventional designs, as specified by the manufacturer.

• High Continuous Torque: Delivers continuous torque of up to 450 mNm.

• High Initial Torque: Provides initial torque of up to 800 mNm for applications requiring short-duration torque peaks, subject to operating conditions.

3. Precision Motion Feedback

• Absolute Magnetic Encoder: Provides absolute position feedback for motion control and positioning applications.

• SPI Communication: Supports communication with compatible control electronics through an SPI interface.

• Controlled Joint Movement: Supports precise position and motion management when integrated with an appropriate controller.

• Robotics Integration: Designed for compact robotic joints and mechanisms requiring feedback-based actuation.

4. Multiple Voltage and Gear Ratio Options

• Flexible Power Supply: Available in 12 V, 24 V, and 48 V configurations.

• Multiple Reduction Ratios: Offers gear ratios of 15:1, 30:1, and 50:1.

• Application-Oriented Configuration: Allows engineers to select a suitable combination based on speed, torque, and installation requirements.

• Compact Drive Solution: Helps reduce the space required for motion components in integrated mechanical assemblies.

Please confirm the relationship between each model suffix and its voltage, gear ratio, and performance ratings before finalizing the configuration.

Technical Specifications

Parameter	Specification
Product Name	Φ20mm Micro Joint Actuator
Product Series	X20
Model	X20S/L-UM15/30/50-MH-4
Dimensions	Φ20mm × 20mm
Supply Voltage	12 V / 24 V / 48 V
Gear Ratio	15:1 / 30:1 / 50:1
Continuous Torque	Up to 450 mNm
Initial Torque	Up to 800 mNm
Encoder Type	Absolute Magnetic Encoder
Communication Interface	SPI
Weight	37.2–41.6 g
Motor Architecture	Axial-Flux Motor
Reduction Mechanism	Miniature Cycloidal Reducer

Note: Torque values represent the manufacturer's stated maximum ratings. Actual performance depends on the selected configuration, operating conditions, thermal limits, and control strategy. Confirm rated speed, torque-speed curves, peak torque duration, backlash, encoder resolution, and environmental specifications with VAXOR before ordering.

Typical Applications

The Φ20mm Micro Joint Actuator is designed for compact motion systems across a range of advanced engineering applications.

• Humanoid Robots: Supports miniature joint mechanisms where compact dimensions and torque density are important.

• Collaborative and Service Robots: Suitable for space-constrained articulated mechanisms and lightweight robotic assemblies.

• Precision Robotic Grippers: Enables controlled movement in compact gripping and manipulation systems.

• Medical Devices: Can be integrated into compatible medical equipment requiring miniature actuation, subject to applicable medical device design and qualification requirements.

• Precision Instruments: Supports compact positioning and motion-control mechanisms.

• Intelligent Equipment: Provides an integrated drive option for automated devices with limited installation space.

• Research and Development: Suitable for robotic prototypes, experimental mechanisms, and compact motion-control platforms.

Final suitability depends on the required torque, speed, duty cycle, positioning accuracy, thermal performance, and system-level safety requirements.

Why Choose VAXOR Micro Joint Actuators?

VAXOR develops micro joint actuators and ultra-micro coreless motors for robotics, medical devices, precision instruments, and intelligent equipment. Founded in 2024 and headquartered in Suzhou, China, the company focuses on compact motion solutions that combine high performance with practical engineering integration.

Key capabilities include:

• Multidisciplinary R&D: Expertise spanning motor design, precision manufacturing, structural engineering, and robotics control.

• Integrated Drive Technology: Combines axial-flux motor architecture with miniature reduction mechanisms.

• Advanced Winding Approaches: Incorporates PCB/FPCB winding technologies and optimized electromagnetic design into its micro-drive development roadmap.

• Engineering Implementation: Supports the development process from prototype validation and pilot production to batch delivery.

• Application-Focused Development: Designs compact drive solutions for robotic joints, precision devices, medical equipment, and intelligent terminals.

These capabilities help address the engineering challenges of miniature actuation, including installation space, torque density, motion response, and manufacturing consistency.

Customization and Integration Support

The Φ20mm Micro Joint Actuator can be evaluated for integration into application-specific motion systems. Available configurations and customization feasibility should be confirmed with the technical team.

Potential discussion areas include:

• Supply voltage selection: 12 V, 24 V, or 48 V.

• Gear ratio selection: 15:1, 30:1, or 50:1.

• Mechanical mounting and interface requirements.

• SPI communication and controller compatibility.

• Continuous torque, peak torque, and operating speed requirements.

• Encoder feedback and positioning control.

• Thermal management and duty-cycle requirements.

• Prototype evaluation and volume production planning.

For accurate selection, provide the intended application, available installation dimensions, required output torque, target speed, and operating cycle.

Ordering Information

To request a quotation or technical evaluation, please specify:

1. Required model and quantity.

2. Preferred supply voltage.

3. Required gear ratio.

4. Continuous torque and peak torque requirements.

5. Target output speed and duty cycle.

6. Mechanical mounting and connection requirements.

7. Encoder and controller integration details.

8. Prototype or mass-production requirements.

VAXOR can help evaluate the appropriate configuration based on your motion-control requirements and integration constraints.

Contact and Product Inquiry

Looking for a miniature actuator for a compact robotic joint or precision mechanism? Contact VAXOR to discuss model selection, technical compatibility, and potential application-specific configurations.

The Φ20mm Micro Joint Actuator combines an ultra-compact footprint, axial-flux motor technology, high torque density, and absolute magnetic encoder feedback to support the development of smaller, lighter, and more capable robotic and intelligent devices.