Roller Screw Linear Actuators

Revolutionising Precision and Power: The Pinnacle of Electric Actuation - Roller Screw Technology

In the dynamic landscape of engineering advancements, roller screw technology has emerged as a transformative force within linear electric actuator motion control. Electric actuators play a pivotal role in diverse applications, ranging from industrial automation to cutting-edge aerospace systems. Roller-screw technology, with its superior precision and power, stands out as a game-changer, pushing the boundaries of what is achievable in the world of linear motion.

At the heart of roller-screw technology is an elegantly simple yet highly effective mechanism. Unlike traditional ball screws, roller screws utilise threaded rollers instead of ball bearings. This seemingly subtle modification yields many advantages, making roller screw technology an increasingly preferred choice for engineers and designers seeking optimal performance.

Olsen Server Roller Screws Image 3

One of the standout features of roller screw technology is its unparalleled efficiency in converting rotary motion into linear motion. The threaded rollers engage with the screw threads in a continuous contact manner, distributing the load over a larger surface area. This enhances torque, and load-carrying capacity and minimises friction, resulting in smoother and more efficient motion. The efficiency gains translate into energy savings, making roller screw-based electric actuators an environmentally friendly and cost-effective solution.

Precision is a hallmark of roller screw technology. In contrast to ball screw technology, roller screws ensure minimal backlash, the play or movement that occurs when the direction of motion is reversed. This attribute is particularly crucial in applications where precision is non-negotiable, such as robotics, medical devices, and aerospace/space applications. The reduced backlash in roller screw technology contributes to enhanced repeatability and accuracy, positioning it as the go-to choice for applications demanding uncompromising precision.


The durability of roller screw technology is another key factor driving its appeal. The continuous contact between the rollers and screw threads minimises wear and tear, resulting in a longer lifespan compared to traditional ball screws. This robustness is especially critical in demanding environments such as heavy-duty industrial machinery and defence systems, where reliability is paramount.

In applications requiring high force and power, roller screw technology also shines. The unique geometry of the threaded rollers enables a higher number of contact points at any given time, distributing the load more evenly. This characteristic not only enhances the load-carrying capacity but also allows for the generation of higher thrust and torque. As a result, roller screw-based electric actuators find themselves at the forefront of applications that demand uncompromising power, such as hydraulic press replacement, metal forming, and precision motion control.

The adaptability of roller screw technology is further underscored by its compatibility with various motor types, including servo and stepper motors. This versatility enables seamless integration into existing systems and facilitates the upgrading of conventional actuation mechanisms. The ease of retrofitting with roller screw technology opens doors for industries looking to enhance the performance of their equipment without undergoing extensive overhauls.

 Exlar Brochure Roller Screw 8

 Roller v Ball graph


Beyond the technical advantages, roller screw technology aligns with the broader industry trends toward miniaturisation and lightweight design. The compact form factor of roller screw-based electric actuators allows for the creation of more streamlined and efficient systems, contributing to advancements in areas such as aerospace and ROV technology, where weight and space are critical considerations.

Roller screw technology represents a paradigm shift in electric actuation, offering a compelling array of benefits over ball screw devices that cater to the diverse needs of modern engineering. From precision-critical applications to high-force environments, roller screw-based electric actuators stand as a testament to the relentless pursuit of excellence in the field of linear motion. As industries embrace this technology, we can anticipate a future where the boundaries of what's possible continue to be pushed, setting new standards for performance and reliability in electric actuation systems.

Below are just some of the options available with our roller screw range of actuators:

  • Internal Calibrated load cell
  • Limit Switches
  • Hundreds of feedback devices
  • Front protective bellows
  • Choice of housing
  • Choice of main rod materials
  • Wide selection of different connector options
  • Internal LVDT linear position sensor
  • Fail-safe open/closed internal spring option
  • Fail-safe brake
  • Manual hand wheel and side hex drive options
  • Application specific greases
  • Customised main rod dimensions
  • Customised front flange mountings
  • Side mounting tapped holes, trunnion mounts or rear clevis mounts
  • Preloaded screw for zero backlash

So if you would like to find out more, just get in touch with Olsen's experienced and friendly team. Your solution is rolling around the corner!

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