49MM Frameless Torque Motor For Robotics And Machine Tools

Product Advantage

• Frameless motor design maximizes design flexibility: By eliminating the outer housing and bearings, this architecture allows engineers to embed the stator and rotor directly into the host machine. This direct integration ensures flawless compatibility with high-precision magnetic encoders, inductive encoders, and RV or harmonic reducers, ultimately providing an all-in-one direct-drive motion control solution that reduces mechanical compliance and enhances positioning accuracy.

• Hollow shaft integration: The generous 30mm rotor inner diameter provides a spacious central channel. This specific geometric advantage allows for the internal routing of essential power cables, pneumatic lines, or optical pathways directly through the core of the motor, minimizing the overall equipment footprint and preventing external wire tangling during complex multi-axis movements.

• Minimizes size and weight: Measuring just 49mm in outer diameter with a highly compact 15mm stack length, this motor drastically reduces the physical payload on moving joints. The reduced mass translates to a lower rotor moment of inertia (0.25 kg·cm²), enabling faster acceleration and deceleration profiles critical for agile automation and rapid indexing.

• Operates at 48V: Engineered with premium Class F insulation, this motor supports stable 48Vdc operation across wide temperature and humidity ranges. It adapts flawlessly to harsh industrial environments, including high-altitude facilities and areas exposed to non-corrosive gases, ensuring uninterrupted productivity regardless of external atmospheric challenges.

  

• Achieves maximum torque density and dynamic performance through superior copper fill factor: The dense, tightly wound copper coils provide a heavy-duty, substantial feel and exceptional electromagnetic efficiency. This superior fill factor generates a peak torque of 1.2 N·m and a rated torque of 0.4 N·m, delivering concentrated rotational force and rapid dynamic response for demanding load changes.

• Optimized thermal management through targeted design: Heat dissipation is actively managed through direct physical contact between the stator and the machine's structural housing. This targeted thermal transfer prevents overheating during continuous 3200 RPM operation. Furthermore, every unit is verified through rigorous high-voltage withstand and insulation resistance testing to guarantee long-term reliability and performance consistency.

• Customization available upon request: We provide comprehensive modular selection guidelines and standardized SKU naming rules. Procurement teams and system integrators can specify exact cable lengths, integrate Hall sensors or brake modules, and select various rotor configurations to match specific project demands perfectly.

Technical Parameters

Product Uses

For Robotics Applications:

The tactile precision and immediate force feedback of this 49mm frameless motor make it an essential component for advanced robotics. In humanoid robots, it acts as the primary joint actuator, delivering the concentrated power needed for fluid, human-like articulation without excess bulk. For quadruped robots navigating unpredictable terrains, the motor provides the rapid torque adjustments required for balance and agility. Additionally, collaborative robots (cobots) and industrial manipulators benefit immensely from the low rotor moment of inertia, which ensures safe, highly responsive interactions alongside human operators. Our technology has been successfully validated through numerous deployments in high-end robotic joint modules, providing reliable performance backing for commercial automation projects.

For Machine Tool Operations:

Direct-drive spindle and rotary table operation for machine tools require absolute rotational stability and zero backlash. By coupling this hollow shaft motor directly to the load, engineers eliminate the need for belts or gears, resulting in a smooth, near-silent operation with exceptional surface finish capabilities. We have established a strong track record of successful deliveries in five-axis CNC machining centers and precision optical turntables, elevating the standards of modern machining equipment.

FAQ

Q1: Can your frameless torque motors be customized for different voltage, torque and dimension requirements?

Answer: Yes, our full frameless torque motor portfolio supports deep engineering customization tailored to your exact mechanical and motion system specifications. Beyond standard operating voltage, continuous and peak torque, bore size, and stack length adjustments, we offer specialized OEM and ODM full-cycle engineering services. This includes custom winding schemes to fine-tune the back EMF and torque constants, as well as specialized potting processes designed to protect the stators in extreme environments. We guide industrial buyers through the entire process, from initial modular selection and engineered sample validation to full-scale serial production, ensuring the final product precisely matches your dimensional and performance criteria.

Q2: Which typical application scenarios are frameless torque motors most suitable for?

Answer: These high-precision frameless direct-drive motors are purpose-built for premium industrial and precision fields where space is limited but performance cannot be compromised. Typical scenarios include the articulated joints of humanoid and quadruped robots, where the hollow shaft allows for neat internal wiring. They are equally critical in medical automation devices, such as surgical robots and imaging equipment, which demand smooth, vibration-free movement. Furthermore, the motors excel in optical precision turntables, aerospace actuation units, and semiconductor precision handling automated equipment, where exact positioning and long-term reliability under strict quality control standards are absolute necessities.