High-Precision Strain Wave Gear Actuators for Industrial Automation

Nabtesco has released a series of fully assembled, backlash-free strain wave gear actuators designed to streamline component integration across the mechanical engineering and robotic automation sectors. These plug-and-play mechatronic systems combine gear units, motors, sensors, and bearings into a single compact footprint, specifically targeting high-precision application areas such as robotics, medical technology, and mobility.

Mitigating Integration Complexity in Drive Systems
In standard drive systems, the gear unit, motor, sensors, bearings, and interfaces require precise individual matching and adaptation to the specific application. This tuning process typically ties up significant engineering resources and extends time-to-market. The newly released actuators resolve this by providing pre-coordinated components integrated into a unified module. By offering a fully assembled drive system, the technology eliminates the need for separate enclosures and external seals, thereby reducing overall design complexity and integration efforts for engineers.

Technical Specifications of Strain Wave and Cycloidal Actuators
Actuators utilizing strain wave gears are engineered for applications that mandate a compact design alongside high precision and zero backlash. The assemblies exhibit high power density and consist of a gear set, bearings, housing, an electric motor equipped with an encoder, and an optional brake mechanism. To accommodate diverse engineering requirements, the units are available in multiple sizes, gear ratios, and torque ranges, including hollow-shaft configurations. The system architecture supports the adaptation of various sensor types, allowing for the integration of torque, temperature, or position sensors. Additionally, the actuators feature full corrosion protection and achieve an IP65 protection rating, which verifies their resistance to dust and low-pressure water jets. For applications involving demanding load scenarios and higher torque requirements, cycloidal gear variants are also manufactured to reduce mechanical stress and design complexity.

Automotive-Compliant Manufacturing and Traceability
The backlash-free strain wave gear actuators are manufactured at the Ovalo GmbH facility in Limburg (Lahn), Germany. Production aligns with strict automotive standards, holding IATF 16949 certification. This standardized manufacturing framework supports high-volume production, rapid development cycles, and full component traceability. The production methodology scales efficiently, maintaining quality and safety protocols from one-piece flow configurations through to mass production environments.

Application Areas and Mechatronic Use Cases
These integrated actuator solutions are deployed across multiple technical sectors, demonstrating their utility where high positioning accuracy and confined installation spaces intersect. Typical application areas include robotic and collaborative robot (cobot) joints, handling and positioning systems, automated guided vehicles (AGVs), and steer-by-wire solutions for the mobility sector. The combination of comprehensive mechatronic drive systems expertise—encompassing mechanics, electronics, and digitalization—enables manufacturers to source coordinated technologies from a single origin, directly yielding shortened development cycles for automation hardware.

Additional Context
This section details technical specifications and competitive benchmarking not included in the original news release.

In the high-precision mechatronic drive market, Nabtesco’s strain wave actuators compete directly with established benchmark systems such as the Harmonic Drive SHA-CG series and the Wittenstein cyber dynamic line, which are evaluated on objective criteria including torque density (Nm/kg), torsional stiffness, and near-zero backlash ratings (typically ≤15 arcseconds) essential for cobot joint repeatability. While competitors like Harmonic Drive provide similar plug-and-play hollow-shaft actuators combining a gearset, servo motor, and high-resolution encoder into a single package, Nabtesco distinguishes its units through native IP65 environmental protection and expanded internal sensor accommodations for torque, temperature, and position monitoring. Across the industry, this shift toward fully integrated mechatronic systems provides a measurable engineering advantage by reducing the overall bill of materials, eliminating the need for secondary sealing mechanisms, and minimizing design complexity for automation hardware.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

www.nabtesco.com