Rolaram®
Roller Screw Actuator
High performance actuation with the planetary roller screw version of the Rolaram electric linear actuator, that provides a high load capability in a small envelope.
The Rolaram roller screw actuator delivers critical actuation to demanding systems in any industry sector for high speed, high duty cycle, high accuracy and long life in a durable and reliable construction.
There are 7 standard Rolaram linear actuator models, available with planetary roller screw drive, which are the R075, R100, R125, R150, R175, R225 and B250. Providing a range of standard dynamic load capabilities up to 400kN and standard linear speeds up to 7500 mm/min. Customised and bespoke solutions are available, including designs for higher loads and speeds.
Useful Information
Key Features
- High Performance Linear Actuation, Lifting & Positioning
- Right angle, Parallel or In-Line motor drive configurations
- Roller Screw versions R050, R075, R100, R125, R150, R175, R225 and R250
- Standard Load Capacities Up To 400kN Dynamic, 600kN Static
- Standard Linear Speeds Up To 7500 mm/min
- Choice of end fittings: Clevis, Threaded End, Top Plate, Fork End, Rod End
- Trunnion mounting (with or without feet)
- Rear Clevis or Fork End
- Limit switches (Proximity Sensor or Electro-Mechanical)
- Encoder (Absolute or Incremental)
- Guided RAM (Anti-Rotation Mechanism) version available
- AC Induction Motor or Servo Motor Drive
Typical Applications
The Rolaram Linear Actuators typical Applications include steel plate mills cooling tables, scissor platforms, lifting platforms, robotics, continuous paint pumps, medical beds, coiling machines, tundish cars, continuous operation process lines, automotive test rigs, nuclear container handling, maglev railway line turnouts, tunnel ventilation dampers, flood defences, stadium roof locks, weir gates and many more.
They are used across many sectors from defence, nuclear, aerospace, metal processing, medical, automotive, offshore and marine, communications and food processing.
Rolaram Advantages
Rolaram electric linear actuators not only match the load capacity of hydraulic cylinders and exceed the load capacity of conventional electro- mechanical actuators but also provide:
- Ease of installation, no pipework, powerpack and valves
- Easy to synchronise more than one unit
- Accurate and repeatable positioning using simplified system
- Low power consumption and running costs
- No oil leaks, contamination or fire risk
- Low noise system
- Higher dynamic and speed capacity and longer life
Special Designs
Rolaram electric linear actuator custom designs have been successfully applied in many varied ‘special’ applications, requiring for example:
- Very high linear speed, over 50 metres/minute
- Very high dynamic load, over 1000kN
- In-line drive configuration
- Integrated auxiliary (backup) Electric Motor Drive Units
- Auxiliary Hand Drive Mechanism
- Integrated secondary brake units or double brakes
- Alternative gearbox designs including high speed bevel gear versions
- Mounting points on the ram either mid-way or at the end of the outer tube
- Temperature extremes (arctic to desert to tropical) or hazardous environments such as subsea
View some special linear actuators design examples in industries. To discuss your requirements further please contact us or submit an application analysis form.
Actuator Systems
Rolaram electric linear actuators can be connected together electronically in systems so that multiple units can be operated and controlled together. These actuator system arrangements or configurations can be built in many formats with the use of standard electronic controls.
Actuator systems are not limited to the number of actuators shown in illustrations. They are regularly supplied to clients with 2, 4, 6, 8 actuator systems. Larger systems can extend up to 16 or higher in excess of 100.
Accessories
End Fittings
Trunnion Mount
Bellows Boot
