Nabtesco RV-6E is a cycloidal precision reducer from the RV-E series, engineered by Nabtesco Corporation (Japan) -- the global market leader with ~60% share in precision reducers for medium and large industrial robots. The RV-E series combines an epicyclic first stage with a cycloidal disc mechanism second stage, achieving exceptionally high rigidity and overload resistance.
RV-6E model: rated output torque 58.8 Nm, peak torque 176.4 Nm. Available gear ratios: 57, 81, 105, 141, 153, 192. Weight: approx. 0.6 kg. Operating temperature: -10 to +40 degrees C. Service life: 6000 h under nominal conditions (L10). Backlash: <=1 arc-min. Shock torque resistance: 3x rated torque.
The RV-E series is primarily used in axes 1 and 2 (main/forearm arm) of industrial robots by Fanuc, Yaskawa, Kawasaki, ABB. Notable for low inertia and high radial/axial load capacity. Lubricated with oil (continuous operation) or long-life grease.

Rotary Actuator · serves as: Gear Reduction, Torque Transmission, Precision Joint Motion, Joint Actuation.
Which group Nabtesco RV-6E belongs to and how it is built
This subcategory covers components responsible for highly accurate torque transmission and speed reduction in robots, manipulators, and joint modules.
A rotary actuator is a component responsible for generating controlled rotational motion. It can be implemented as an electromechanical, pneumatic, or hydraulic module, depending on the application. In robotics, rotary actuators are used in joints, positioning mechanisms, manipulator drives, and automation equipment where angular motion is required.