The global site of the UK's leading magazine for automation, motion engineering and power transmission
26 May, 2024

Twitter link

All-electric actuators ‘out-perform hydraulics’

15 May, 2018

A US company has developed a maintenance-free electromechnical linear actuator technology that, it claims, offers higher power densities and better reliability than rollerscrew or hydraulic technologies. Massachusetts-based Rise Robotics says that its Rise Cylinder actuators can replace hydraulic systems of all sizes, resulting in quieter, more efficient, all-electric machines.

A 95mm-diameter version with a 1.2m stroke length, for example, can deliver a force of 9.5kN and a maximum speed of 0.8m/s, with a service life of 1,120km. The actuators are available in diameters up to 650mm, providing thrust loads of up to 450kN and speeds of up to 1m/s for millions of maintenance-free cycles.

The actuators do not need any fluid, pumps or lubrication, and can operate maintenance-free for millions of operating cycles. Rise says that they can be built in sizes that would be impossible for rollerscrews and other linear actuator technologies, leading to powerful all-electric lifting machines.

For special applications, the cylinders can be fabricated in versions with strokes of around 20m. Unlike rollerscrews, they are not constrained by screw-related limitations.

Rise Robotics' maintenance-free actuators offer high power densities

Rise Robotics was founded in 2011 with the aim of developing high-performance exo-suits. It developed the linear actuators as part of this programme. It is now working with partners to take the technology to the market.

  • To view a digital copy of the latest issue of Drives & Controls, click here.

    To visit the digital library of past issues, click here

    To subscribe to the magazine, click here



"Do you think that robots create or destroy jobs?"



Most Read Articles