Understanding the Latest High Power Density Micro Motor Specifications
Engineers working on bionic robots, industrial automation systems, medical devices, and consumer electronics increasingly require actuation components that combine high torque density, precision, and a compact footprint. This need is especially acute in micro-manipulation and high-load robotic applications, where space constraints and performance demands intersect. VAXOR-MOTOR, operating under the AXOR brand, positions itself as a provider of integrated micro-actuation solutions built around axial flux motors, cycloidal gear reducers, and non-contact encoder integration. The company's product matrix reflects a direct response to this industry pain point, offering specification data that engineers can reference when evaluating actuation options for sophisticated robotic and industrial systems.
Core Technology Behind High Power Density Performance
The foundation of VAXOR-MOTOR's approach to power density lies in the integration of three technologies: axial flux motors, micro cycloidal gear reducers, and non-contact absolute magnetic encoders. This combination is designed to achieve high torque density and rigidity within a small form factor. A key differentiator is the electromagnetic design, which optimizes phase imbalance to within 5% for ultra-micro motors, a control measure that supports higher yield and improved power density during manufacturing.
Across the actuator lineup, diameters range from Φ16mm to Φ30mm, giving engineers a scalable set of options depending on load and space requirements. Gear efficiency reaches up to 75% for specific modules, while backlash is controlled as low as 15 to 20 Arcmin, both of which directly affect the precision and responsiveness of the final assembly. These outcomes are achieved through a modular design architecture combined with optimized electromagnetic design for brushless and coreless systems, allowing the same core technology platform to scale across multiple product lines.
Micro Joint Actuator Modules: Specification Breakdown
The Micro Joint Actuator Modules line is positioned for precision actuation in dexterous robotic hands, highly integrated robots, and general mechanical motion control. Each diameter class carries distinct specifications suited to different load profiles.
Φ16mm Micro Joint Module (X16S / X16L)
This is the lightest module in the lineup, weighing as little as 24.3g in the S-version and 26.1g in the L-version. It delivers a continuous stalling torque greater than 7.1 mNm, with a maximum stalling torque above 16.5 mNm. Integrated gear reduction is available in ratios of 30, 40, and 50, allowing the 16mm footprint to produce elevated torque output. An integrated absolute magnetic encoder supports precise position feedback, while SPI communication provides low-latency control response. Thermal management is built in through chassis temperature limits of 80°C, 115°C, or 145°C depending on power loss conditions, helping prevent overheating during operation.
Φ20mm Micro Joint Module (X20S / X20L)
Designed for medium-load precision actuation in bionic and automation applications, this module delivers a continuous stalling torque greater than 17.2 mNm and a maximum stalling torque above 35.3 mNm. It supports 12V, 24V, and 48V operation, offering flexibility across different power architectures. A multi-ratio gearbox is available in 15, 30, and 50 ratios to balance speed and torque needs, and the full assembly can reach a stalling torque of up to 450 mNm at ratio 50. The FPC 7PIN interface standardizes wiring for both power and data, simplifying integration into robotic limbs.
Φ25mm Micro Joint Module (X25S-UZ / X25S-BZ)
Positioned for high-torque applications in industrial and medical robotics, this module uses the CAN FD protocol for communication in demanding industrial environments. It reaches a continuous stalling torque of up to 1150 mNm at ratio 50. Backlash is reduced to 15 Arcmin for high motion accuracy, while mechanical strength limits extend to 1800 mNm initial torque in a cold state, supporting peak load scenarios.
Φ30mm Micro Joint Module (X30S-UZ / X30S-BZ)
As the largest module in the series, this unit is built for heavy-duty micro-robotic applications. It reaches a continuous stalling torque of up to 1500 mNm at ratio 50 and achieves gear efficiency of up to 75% at ratio 30. CAN FD integration supports complex network architectures for multi-joint robots, and total inertia is measured at 30.4 gcm², contributing to stability during high-load motion.
Ultra-Micro Brushless and Coreless Motors: G04P / G05P / G06P Series
Beyond the joint modules, VAXOR-MOTOR's G04P, G05P, and G06P series address the need for ultra-compact power in precision instruments, where sub-6mm motor production has historically involved high cost and low yield. These motors weigh between 1.7g and 3.75g while achieving no-load speeds of up to 63,000 RPM, with the range spanning 55,000 to 63,000 RPM depending on the specific model. This makes them applicable to micro-pumps and drones that require both light weight and high rotational speed.
The phase imbalance control within 5% carries through to this series as well, contributing to reduced production costs and improved reliability. Thermal resistance is rated to support chassis temperatures up to 145°C, and terminal resistance is kept as low as 1.6Ω to improve electrical efficiency. These characteristics support use in micro-surgical robots, precision optical adjustments in photonics, and miniature haptics and pumps in consumer electronics.
Platform Compatibility and Communication Protocols
Across the product matrix, the technology platform supports 12V, 24V, and 48V DC bus systems, giving system integrators flexibility when matching actuators to existing power architectures. Communication openness is supported through SPI and CAN FD protocols, and hardware integration is standardized through an FPC 7PIN interface with a 0.5mm pitch, carrying VCC, GND, CS, SCK, MOSI, MISO, and CAL (calibration) lines.
Industry Applications and Validated Use Cases
These specifications have been applied across several documented scenarios. Robotic dexterous hands have utilized the X16 and X20 modules to achieve high-integration mechanical motion control, enabling finger-level dexterity. Industrial automation systems have integrated Φ30mm modules into precision transmission systems, achieving 75% gear efficiency while keeping mechanical backlash to 15 Arcmin. Micro pump systems have employed the G05P ultra-micro motor at 55,000 RPM to drive fluid transmission in medical and consumer applications. Photonics applications have applied ultra-micro brushless motors for precision positioning in optical instruments, relying on the sub-5% phase imbalance for stable performance.
Business Model and Engagement
VAXOR-MOTOR follows a product-based sales approach for its standardized modules across the X16, X20, X25, and X30 series. Deployment is supported through hardware integration using the standardized FPC 7PIN interface or CAN FD and SPI communication protocols. After-sales support focuses on technical inquiries and discussions regarding product specifications and operational parameter ranges, giving engineers a direct channel to verify how these specification figures apply to their own system requirements before finalizing an actuation design.
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Suzhou Vaxor-motor CO.,LTD.
