RealMan Robotics unveils high-power-density joint modules for high-performance robotics

Three new components can be used in a variety of robotics applications

RealMan Robotics

By Robotics 24/7 Staff December 29, 2025

RealMan Robotics

RealMan Robotics launched three new joint modules, the WHJ03, WHJ120 and WHJ48V.

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Embodied intelligence, modular robotic systems and ultra-lightweight humanoid robotic arm company RealMan Robotics has unveiled three next-generation joint modules: the ultra-compact WHJ03, the high-torque hollow-core WHJ120, and the WHJ48V Wide-Voltage Series.

The company said this launch marks a key milestone in its strategic expansion in core robotic components, delivering a unified power offering for robots ranging from lightweight desktop arms to heavy-duty industrial systems.

RealMan said that the High-Power-Density (HPD) servo joints deliver high torque density, fast dynamic response, high precision, reliability and cost efficiency. The company said the new modules address diverse industry needs through compact, integrated and modular designs, enabling high-performance robotics across consumer, commercial and industrial applications.

A unified power base for robotics

With the launch of these three next-generation modules, RealMan Robotics said it’s further expanding its product portfolio and strengthening its position as a key enabler in the global robotics ecosystem.

RealMan provided the following details on the three new servo joints:

WHJ03: Ultra-compact, precision control
- The company said the WHJ03 is a 3 Nm joint module measuring 33 x 48 mm, designed for desktop robots and consumer humanoids where space is at a premium. According to RealMan, it delivers 35-55% higher torque within the same volume and reduces size by more than 50% compared with mainstream alternatives. Featuring minimal backlash and low jitter, the WHJ03 ensures smooth and precise motion for delicate tasks such as liquid handling and fragile object manipulation, while also supporting natural humanoid head and neck movements.
WHJ120: High torque, hollow-core design
- The company said its WHJ120 delivers a rated torque of 120 Nm with a 16 mm hollow core, making it ideal for collaborative robots and humanoids that require high torque and flexible cable routing. Its hollow-core structure reduces mechanical complexity while supporting heavy-duty operations. RealMan said that typical applications include shoulder, elbow and waist joints in cobots, as well as shoulder, hip and knee joints in humanoids, enabling compact yet powerful designs capable of handling larger payloads.
WHJ48V Wide-Voltage Series: High power and efficiency
- Supporting input voltages of up to 60V, RealMan said the WHJ48V Series delivers higher peak speeds, greater power density and improved energy efficiency, while reducing current, heat generation and cable losses. Fully compatible with 24V systems, the company said this series is well-suited for high-end humanoids, mobile robots (including quadrupeds and wheeled platforms), cobots and exoskeletons, meeting stringent requirements for dynamic response, endurance and lightweight design.

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RealMan Robotics unveils high-power-density joint modules for high-performance robotics