#Japan #Tokyo #Robotics #iREX 2025 #Harmonic Drive

Raifuku Harmonic Unveils Lightweight Harmonic Reducers at iREX 2025

On November 24, 2025, at the International Robotics Exhibition (iREX) in Tokyo, Raifuku Harmonic, a leading player in the precision drive sector, introduced a series of groundbreaking harmonic reducers tailored for the humanoid robot industry. Among these innovations, the spotlight is on the ultra-lightweight 03 series micro harmonic reducer, weighing only 13 grams. This revolutionary product not only demonstrates Raifuku’s comprehensive technological capabilities as a 'Core Design Partner' and 'Industry Collaborator' but also offers support to humanoid robot manufacturers in their transition from research and development to commercialization.

A Breakthrough in Miniaturization

One of the critical challenges in designing humanoid robots, especially for intricate joints such as wrists and ankles, has been weight and performance limitations. The miniaturization and lightweight design of harmonic reducers are keys to overcoming this bottleneck in robotic design. Zhang Han, Raifuku's Chief Technology Officer, expressed pride in their achievement, stating, "We are proud to be the first in the industry to stably mass-produce a full line of micro harmonic reducers, including the 03, 05, and 08 series in China. The 03 series showcases exceptional movement precision and torque output while being a remarkable 13 grams, providing robot designers with unprecedented freedom."

Collaborative Innovation: Over 30% Reduction in Component Weight

In addition to the product miniaturization, Raifuku Harmonic is focused on resolving weight reduction challenges faced by customers' systems through collaborative research and development. Zhang further highlighted, "Cross-roller bearings are one of the components that reflect weight in harmonic reducers. Through joint technology development with humanoid robot companies in China, we have successfully reduced the weight of this component by over 30% using advanced topology optimization techniques without compromising rigidity. I look forward to sharing this achievement with everyone."

Comprehensive Product Portfolio for All Applications

To meet the diverse demands of humanoid robots—from fingers to torso—Raifuku Harmonic has built a robust lineup of products. The exhibition will showcase an extensive product range from micro-series, including the 03, 05, and 08 models, to larger models like the 50 and 58 series. These products encompass all application scenarios, from delicate operations to high-load operations.

Join Us at iREX: Let's Pioneer the Future Together!

We warmly welcome industry professionals, partners, and media representatives interested in advanced robotics technology to visit us at Booth W3-22 in West Hall 3 of the iREX exhibition. Experience our entire series of harmonic drive solutions up close and engage directly with our expert technical team, as we discuss how to realize more precise, powerful, and lightweight joints for humanoid robots.

About Raifuku Harmonic

Raifuku Harmonic Drive Ltd. is a prominent supplier of precision drive solutions representing the Chinese industry, specializing in the research, development, manufacturing, and sales of harmonic reducers. We dedicate ourselves to providing high-performance and reliable core components for robotics, aerospace, and advanced equipment sectors through continuous technological innovation and a complete supply chain.