LINEAR ACTUATORS

Linear Actuators Rolaram

Overview of Rolaram Linear Actuator Range What is a Rolaram® Linear Actuator? Rolaram® is an electro-mechanical linear actuator, which consists of either a Spiracon™ planetary roller screw or a ball screw, driven by an electric motor, through a reduction gearbox. The lead screw converts rotary motion to linear movement. As the screw rotates, the nut extends and retracts the ram, which is attached to the load. Parallel Configuration Helical Spur Gearbox Brake Motor Screw Support Bearing Bearing Support Spiracon Roller Screw Clevis End Thrust Bearing Housing Tapered Roller Thrust Bearings Outer...

Linear Actuators Features of Rolaram Actuator Main features of Rolaram® Actuators • • • • • • • • High efficiency screw mechanism and gearbox High dynamic load capacity and wide speed range Controllable for synchronisation Precise repeatability of positioning Long life and low maintenance and running costs Clean operation and low noise Cost effective package Guided ram option Advantages over other Actuators Rolaram actuators can not only match the load capacity of hydraulic cylinders and exceed the load capacity of conventional electro-mechanical actuators but also provide: • • • • • • • Easy...

Working Applications for Rolaram Actuators Application Die splitter for opening up 20 tonne die sets, prior to their use in the production of car body panels. Linear Actuation Requirements Dies require to be split evenly, with all corners being moved simultaneously, within 5 microns of each other. Solution 4 identical Rolaram actuators mounted one on each corner of the die splitter. Each driven by a servo motor, controlled by a PLC, to ensure synchronisation of all 4 actuators, within the required limits of positional accuracy. Cranes were previously used to split the dies and the die splitter...

Linear Actuators Working Applications for Rolaram Actuators Application Grinding head adjustment to put precise tapers on camshaft cam lobes. Linear Actuation Requirements Moving a load of 270kg, on a continuous duty cycle, over an operating life of 10 years. Solution A single Rolaram actuator fitted with an AC servo motor and encoder. Unit is sealed to prevent the ingress of abrasive dust. Application De-chocking car for removal and refitting of 14 tonne bearing assemblies (chocks) on steel rolls. Linear Actuation Requirements 4 stage sequence of operation • Locate car on its rails, parallel...

Linear Actuators Product Code for Rolaram® Actuators RR150AP-0300-0500-CT00-E1B0P10 R150 Rolaram Linear Actuator with Roller Screw Drive, Standard design with electric motor mounted parallel to ram, 300mm/min linear speeed, 500mm stroke, Clevis End on ram, Standard Trunnion Mount on gearbox, 415VAC 3-Phase 50Hz induction motor with brake, no encoder feedback, 2 fixed proximity sensors for end of stroke position indication mounted in position-1, standard paint lubrication and seals. GROUP-1 - Linear Actuator Definition GROUP-2 - Linear Actuator Features GROUP-3 - Accessories GROUP-1 - Linear Actuator...

Linear Actuators Product Code for Rolaram® Actuators GROUP-3 - Accessories 24 - Drive Type E 25 - Motor Power Supply None - No Motor 0 415VAC 3-Phase, 50/60Hz Induction Motor (Standard) 1 220VAC 1-Phase, 50/60Hz Induction Motor 2 24VDC Permanent Magnet 3 AC Servo Motor - 3-Phase, AC 4 AC Servo Motor - 1-Phase, AC 5 DC Servo Motor 6 Electric Motor (Standard) Electric Motor and auxiliary shaft on gearbox Electric Motor with auxiliary shaft Hand Wheel Electric Motor & Hand Wheel No Motor - Just Motor Mount, B14 No Motor - Just Motor Mount, B5 No Motor Fittings - solid shaft input - single ended...

Rolaram® Linear Actuator Range There are 8 standard Rolaram models, available in 2 standard drive configurations, each with 10 linear speeds and offering a wide range of load capabilities. The R050, R075, R100 and R125 models are available in a Ball Screw version, for applications where positional accuracy is less important and a more cost effective solution is desired. Where the standard range does not meet the application specification, special actuators can be designed to meet customers’ specific requirements (refer page 11). Dynamic Load Capacity and Linear Speed Dynamic load capacity from...

Linear Actuators Rolaram® Linear Actuator Range Operating Life and Duty The actuator models listed in the Technical Charts are capable of very high operating lives (in excess of 10,000 hours for some high speed models). The ball screw version may have a lower life expectancy than the equivalent roller screw version. Due to the almost limitless number of possible configurations, please consult our Technical Sales Department for an estimate of life for individual applications. Continuous duty applications e.g. reciprocating pumping systems can also be realised. Efficiency The inherent high efficiency...

How to Select a Rolaram® Actuator There are 4 simple steps as follows : Step 1 Using the load/speed curves on page 8, select the actuator model which has an adequate dynamic load capacity for the required linear speed. Positional accuracy and life considerations may dictate selection of the roller screw version for models R075, R100 and R125. Referring to the Technical Charts (page 11) for that model, select the nearest linear speed for the chosen right angle or parallel drive configuration. Check the required stroke is within the maximum stroke limit. Choose the end fitting, mounting arrangement...

Linear Actuators Rolaram® Performance Data General Rolaram Performance Summary Load Linear Speed 80% (typical) Roller Screw Ball Screw Extreme (consult Power Jacks) Operating Temperature 10 000 hours typical as standard at full rated load and speed Model B050/R050 Parallel Configuration Ball Screw Product Code Linear Speed (mm/min) Dynamic Load capacity (kN) Frame Size Linear Speed (mm/min) Dynamic Load capacity (kN) Roller Screw Product Code Frame Size Static load capacity = 19kN For tensile loads, greater maximum strokes can be accommodated, depending on linear speed. Total weight = basic weight...