Nabtesco Corporation :: Precision Reduction Gears, Harmonic Drives & Cycloidal Reducers for Industrial Robotics

Nabtesco Corporation is a major Japanese precision equipment manufacturer and a global leader in precision reduction gears (also known as harmonic drives or cycloidal reducers) used extensively in industrial robotics. While not a full robot manufacturer like Fanuc or Yaskawa, Nabtesco is a critical enabler of modern robotics through its high-performance motion control components. The company’s precision reduction gears are found in the joints of the majority of medium-to-large industrial robots worldwide, powering accurate, powerful, and reliable movements essential for automotive assembly, electronics manufacturing, and other high-precision applications.

Nabtesco has held the top global market share in precision reduction gears for industrial robot joints for approximately 30 years. Their technology allows small motors to deliver high torque while maintaining exceptional accuracy, rigidity, and compactness — key requirements for modern collaborative and industrial robots. The company’s products are used by leading robot OEMs globally and contribute significantly to the performance, safety, and efficiency of automated production lines.

Key robot-based products (precision reduction gears) include:

• RV™ Component Type: Nabtesco’s flagship precision reduction gear series. These compact, lightweight units offer outstanding rigidity, overload resistance, low backlash, high accuracy, and smooth motion. They are ideal for robot joints requiring powerful acceleration and precise positioning. The RV series is widely used in 6-axis articulated robots for tasks such as welding, assembly, material handling, and palletizing.
• Gear-Head Type: A ready-to-mount version of the RV reducer, designed for easy integration with servomotors. It includes airtight grease sealing and is optimized for straightforward installation in robotic systems.
• Gear-Head Type (Table Type): Low-profile, large-diameter hollow-shaft models designed for accurate positioning applications, such as index tables, rotary stages, and pivots in robotic cells and automation equipment.

Nabtesco’s reduction gears are valued for their long service life, high reliability, and ability to deliver precise control even under heavy loads. The company continues to innovate in high-torque, compact designs to support the growing demand for collaborative robots, humanoids, and next-generation automation. Beyond robotics, their components are used in machine tools, medical devices, aerospace, and defense applications.