High-Speed Rotary Actuators | Frictionless Control

What is a Rotary Actuator?
What is its Function in Robot Joints?

A rotary actuator is an electromechanical (or fluid-powered) device that converts stored energy into a controlled angular displacement. In robot joints, it supplies the commanded torque, speed and position feedback that swing a link to an exact angle—typically within a few milliradians—so the arm can grip, weld, screw or inspect with repeatable accuracy. Brushless servo versions dominate modern robots because they pair high torque density with long, maintenance-free life.

Norck Robotics – Expertise in Rotary Actuator Manufacturing

Norck Robotics combines vertically integrated manufacturing and motion control expertise resulting in high-quality rotary actuators. From pocket-size micro-positioners to industrial-scale high-torque rotary actuators, everything is designed, assembled, and 100% tested in-house and every unit leaves our facility with reliable, repeatable performance in compact or heavy-duty applications. Whether you need a pneumatic rotary actuator that can be used in the tightest of spaces or a custom build for advanced levels of automation, Norck Robotics will consistently deliver smooth, accurate, reliable motion - with global support and trust from engineering teams worldwide.

End-to-end manufacturing

We machine, finish, and assemble finished products in our clean room, which translates into a high level of quality.

Built for extreme environments

Our rotary actuators can withstand high loads, harsh media, and heavy duty cycles.

Seamless integration

We provide custom mounting solutions, torque and sensor configurations for any system.

Engineered for control

If you have an application that requires a pneumatic rotary actuator with precise movements and positioning, we can help.

Test and perform

Every Norck rotary actuator is lifecycle and stress-tested to limit your unplanned downtime.

Designed for sustainability

Every step in our build process is efficient and we use environmentally friendly packaging.

Worldwide support

Regional engineering assistance and fast parts availability to keep systems running without delays.

Ready to automate your future? Get a quote from Norck Robotics now!

UNMATCHED ROBOTICS ENGINEERING SUPPORT

Integrated System Design

Norck Robotics specializes in providing unique robotic automation and engineering solutions designed to meet the specific operational needs of each client. Our expertise covers a wide range of industries and applications.

Engineering Expertise, Every Step of Automation

Norck Robotics delivers turnkey robotic automation and engineering solutions tailored to your specific needs across various industries.

Your Solution, Your Scale

Whether you need a single robotic cell prototype or full-scale factory automation, Norck Robotics engineers are ready to collaborate with you to bring your concept to life.

Optimize Your System for Automation

Norck Robotics engineers analyze your existing processes to provide feedback that enhances efficiency, cost-effectiveness, and productivity for robotic integration.

What are the Selection Criteria (Torque, Speed, Resolution, Backlash) for Rotary Actuators?

Choosing an actuator means balancing four key performance metrics against the task.

Torque

must exceed peak load and inertia by ~30 % to avoid stalling.

Speed

ated RPM must meet cycle-time targets without overheating.

Resolution

smallest commandable angle (step size or encoder count) dictates positioning granularity.

Backlash

mechanical play on reversal; aim for <1 arc-min in high-precision assembly, higher values acceptable for coarse motions.

How do Different Rotary Actuator Types (Stepper, Servo, Magnetostrictive) Work?

Each technology follows a distinct physical principle to create rotary motion.

Servo

brushless motor plus encoder; a closed loop corrects current every microsecond for smooth, continuous rotation, high torque density and sub-degree accuracy.

Magnetostrictive

smart alloy twists in a magnetic field; that strain is amplified through a flexure, giving backlash-free, frictionless rotation with micro-second response.

Stepper

stator phases fire in sequence; every pulse moves the rotor one fixed step (e.g., 1.8 °), enabling open-loop, self-locking positioning.

WHY NORCK ROBOTICS?

Access Broad Integration and Project Capacity

In addition to its own expert engineering team, Norck Robotics provides access to a network of hundreds of top-tier system integrators, robot manufacturers, and component suppliers across the United States, Germany, and Europe.

Create Resilience in Your Supply Chain

Working with Norck Robotics reduces dependency on manual labor, increases production consistency, and secures your operations against unforeseen disruptions, quality issues, and fluctuations. This enhances your company's supply chain resilience.

Technology-Driven Solutions

Norck Robotics advances digital automation by developing custom-designed robot grippers, advanced vision systems, and innovative simulation software. With an AI-driven, data-centric approach, it enables smarter system design, optimal performance, and predictive maintenance solutions.

Environment-Focused Approach

Norck Robotics encourages its partners to be carbon-neutral by reducing energy consumption and material waste through the efficiency of robotic automation, and prioritizes environmentally conscious suppliers.

What Rotary Actuator Solutions does Norck Robotics Offer?

Nork Robotics has a comprehensive range of rotary actuator technologies that meet the specific and exacting requirements of today's automations and robotic systems. Nork provides actuators that merge reliability and performance where high-speed movement or positional accuracy is of prime importance.

  • High torque rotary actuator technology for rotating application with high torque ensures smooth motion under load and consistent output characteristics over cycles.
  • Compact Servo Rotary Actuators fit well in confined spaces equipped with closed-loop control, fast response, and high accuracy for robotic joints and positioning tasks
  • Zero-Backlash Direct-Drive Actuators are constructed for ultra-precise motion; these actuators have no mechanical play, making them suitable for semiconductor, optical, and test automation systems.
  • Scalable Custom Solutions are developed by Norck to arrive at custom-made rotary actuators matching exact mechanical, electrical, and environmental requirements thus ensuring seamless integration into specialized applications.

Robotic motion demands drives that balance precision, torque, size, and durability; thefive rotary-actuator families below each solve that puzzle in a different way.

Brushless Servo Rotary Actuator

Couples a high-torque brushless DC motor with an integrated encoder, delivering smooth, closed-loop rotation, flat torque curves, and >90 % efficiency; its compact, sealed housing thrives in robot joints and 24/7 automation where millisecond response, low heat, and maintenance-free longevity are essential.

Closed-Loop Stepper Rotary Actuator

Adds an encoder to a cost-effective stepper, so the controller corrects every micro-step in real time—eliminating missed steps, boosting torque at speed, cutting motor heat, and giving servo-like accuracy for conveyors, light-duty robots, and tooling that can’t justify full servo prices.

Miniature Servo Gearmotor (PWM)

Integrates a palm-sized servo, reduction gearbox, and feedback electronics; accepts hobby-standard PWM signals from Arduino/Raspberry Pi, delivers high torque-to-weight and sub-degree positioning, making it perfect for battery-powered rovers, STEM kits, and compact pan-tilt mechanisms.

Magnetostrictive Rotary Actuator

Uses smart alloys that twist in a magnetic field, producing friction-less motion and contact-free position sensing; the resulting zero-wear design excels in harsh, high-vibration, temperature-swing environments such as heavy machinery, aerospace surfaces, and oil-and-gas valves.

Precision Harmonic Drive Rotary Actuator

Employs an elliptical wave generator, flexspline, and circular spline to achieve zero backlash, high gear reduction, and stellar repeatability; the light, slim package supplies camera gimbals, surgical wrists, and micro-assembly robots with rock-steady, vibration-free positioning even under large torques.

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