Nabtesco

A Japanese precision-reducer giant, the main supplier of RV reducers for industrial robots.

Nabtesco was formed in 2003 through the merger of Teijin Seiki and Nabco, headquartered in Tokyo. It is best known for its precision-reducer business: its RV (rotate vector) reducers combine a cycloidal stage with a planetary-gear stage for high stiffness and shock resistance, suited to heavily loaded robot joints, with flagship series including RV-N, RV-C, and RV-E. The company estimates its own global share of precision reducers for the joints of medium and large industrial robots at about 60%. For embodied AI, it represents how core components like reducers have long been dominated by Japanese suppliers, and it is the main benchmark Chinese reducer makers compare themselves against in pursuing domestic substitution.

ExampleThe RV-N series precision reducer is used in the heavily loaded joints of medium and large industrial robots.

Also called

Nabtesco Corporation

Related

Rotate Vector (RV) Reducer · Cycloidal Reducer · Speed Reducer / Gearbox · Strain Wave Gear (Harmonic Drive) · Big Four of Industrial Robotics · Domestic Substitution

Sources

Precision Reduction Gears | Nabtesco Corporation
Nabtesco 2026 Company Profile | PitchBook

As of

2026-09