Stocks in Focus

iRobotics Jumps 24% on News of Silicon Nitride Bearing Reducer Development [Featured Stock]

Shin Ha-yeon
2026-06-05 09:14:28
[Edaily Reporter Shin Ha-yeon] #iRobotics is up more than 24% in early trading.
According to MP Doctor on the 5th, as of 9:13 a.m. today, iRobotics is trading at 3,150 won, up 24.51% from the previous trading day.
This surge is believed to have been driven by the company’s announcement that it is targeting the humanoid robot market with next-generation gearboxes featuring silicon nitride (Si₃N₄) bearings, which has stimulated investor sentiment.
Previously, iRobotics invested in a domestic silicon nitride materials company last April to replace the steel bearings used in existing robot reducers, and based on this, developed a reducer incorporating silicon nitride bearings.
The silicon nitride bearing reducer is characterized by a weight reduction to one-third that of existing products while significantly increasing rigidity. The company expects that by achieving both lightweight design and high rigidity, it will be able to improve battery efficiency—a key challenge in the commercialization of humanoid robots.
Following the recent resolution of a management dispute, iRobotics is expanding its investment in the robotics business. The company is investing approximately 40 to 50 billion won to establish production facilities for ultra-compact harmonic reducers and is working to stabilize its mass production system.
An iRobotics official stated, “Ultra-lightweight, high-rigidity reducers based on silicon nitride bearings will become a key component in accelerating the commercialization of humanoid robots,” adding, “We will actively respond to market expansion based on proactive facility investments and our domestic and international production networks.”

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