Electric Linear Actuators

Electric linear actuators convert energy and signals into linear motion, allowing for backward or forward movement. This motion is used to tilt, lift, push, or pull objects where force is needed, utilising electrical AC and DC motors, as well as hydraulics and pneumatics.

How do Electric Linear Actuators Work?

Installing an electric linear actuator is straightforward. The electric motor connects to the actuator, turning the screw via gears to create linear movement through the main shaft or spindle. Ball screws offer precise control and positioning, while roller screws handle higher forces. A key difference among actuators is the stroke length, which refers to the length of the screw and shaft.

Types of Linear Actuators

Ball Screen Linear Actuators

Ball screw linear actuators are a type of linear actuator that uses a ball screw mechanism to convert rotary motion into linear motion. The ball screw mechanism consists of a screw and a nut with ball bearings that circulate between the screw and nut threads, reducing friction and enabling smooth and precise movement.

These actuators are commonly used in applications that require high precision, accuracy, and efficiency, such as limit switches and motion coolers in CNC machines, robotics, and aerospace systems.

Lead Screw Linear Actuators

Lead screw linear actuators are a simpler and more cost-effective type of linear actuator that uses a lead screw mechanism to convert rotary motion into linear motion. The lead screw mechanism consists of a screw and a nut with trapezoidal or Acme threads.

These actuators are commonly used in applications where high precision is not critical, such as material handling, packaging, and agricultural machinery.

Belt-Driven Linear Actuators

Belt-driven linear actuators utilise a belt and pulley system to translate rotary motion into linear motion.

These actuators are known for their high speed and long stroke capabilities, making them suitable for applications that require rapid and extensive movements, such as in Variable Frequency Drives (VFDs) for conveyor systems, packaging machines, and sliding doors.

Gearbox Linear Actuators

Gearbox linear actuators incorporate a gearbox to increase torque and reduce speed, providing high force output for demanding applications.

These motorised linear actuators are commonly used in heavy-duty applications, such as lifting heavy loads, controlling large valves, and operating industrial machinery.

Rack and Pinion Linear Actuators

Rack and pinion linear actuators use a rack and pinion mechanism to convert rotary motion into linear motion. The rack is a linear gear, and the pinion is a circular gear that meshes with the rack.

These actuators are known for their simple design, high speed, and low cost, making them suitable for applications such as material handling, packaging, and robotics.

Hydraulic Electric Linear Actuators

Hydraulic electric linear actuators combine the power of hydraulics with the precision of electric controls. They use an electric motor to drive a hydraulic pump, which generates hydraulic pressure to move a piston within a cylinder.

These actuators are ideal for applications that require high force and precise control, such as construction equipment, aerospace systems, and heavy-duty industrial machinery.

Compact Linear Actuators

Compact linear actuators are designed for applications where space is limited. They offer a smaller footprint and lighter weight compared to traditional linear actuators, making them suitable for use in robotics, medical devices, and other compact systems.

These miniature electric linear actuators are ideal for applications where size and weight are critical factors.

Applications of Electric Linear Actuators

Electric linear actuators are used across a wide range of industries and applications in Australia, providing reliable and efficient linear motion control. Examples of how electric linear actuators are utilised in various sectors include:

• Factory Automation: Electric linear actuators play a crucial role in factory automation, powering conveyor systems, robotic arms, and other automated equipment. Their precise control and programmability make them ideal for tasks that require repetitive or complex movements.
• Industrial Machinery: Heavy-duty electric linear actuators, including powerful electric ram actuators, are commonly used in industrial machinery, such as presses, cutters, and welding machines, to provide powerful and precise linear motion for various manufacturing processes.
• Food & Beverage: Electric linear actuators are employed in the food and beverage industry for tasks such as sorting, packaging, and filling. Their hygienic design and corrosion resistance make them suitable for use in food processing environments.
• Machine Tools: Linear actuators are essential components of many machine tools, including lathes, milling machines, and grinders. They provide accurate and controlled movement for cutting, shaping, and finishing operations.
• Packaging: Electric linear actuators are used in packaging machinery to automate tasks such as sealing, labeling, and palletising. Their speed and precision contribute to efficient and reliable packaging processes.
• Automotives: Linear actuators are used in various automotive applications, such as adjusting seats, opening and closing windows, and controlling electric motor-driven mirrors.
• Robotics: Electric linear actuators are fundamental components of robotic systems, providing the movement and dexterity required for various tasks, from industrial automation to healthcare and exploration. Micro linear actuators are particularly useful in miniature robots and medical devices.

Benefits of an Electric Linear Actuator

Electric linear actuators offer numerous advantages over other types of actuators, making them a popular choice for a wide range of applications. Some key benefits of using electric linear actuators include:

• Simple Design and Flexibility: Electric linear actuators have a simple and compact design, making them easy to install and integrate into various systems. They also offer flexibility in terms of stroke length, speed, and force, allowing them to be customised for specific applications.
• Easy to Integrate with Other Systems: Electric linear actuators can be easily integrated with other control systems, such as PLCs and microcontrollers, enabling automation and remote operation.
• Precision and Accurate Control: Electric linear actuators offer precise and accurate control over linear motion, making them ideal for applications that require fine adjustments or repetitive movements.
• Reduced Operating Costs: Compared to hydraulic or pneumatic actuators, electric linear actuators require less maintenance and have lower operating costs, as they don't require fluids or air compressors.
• Energy Efficient Electric System: Electric linear actuators are energy efficient, consuming power only when in operation. This can lead to significant energy savings compared to other actuator types.

What to Consider Before Buying a Linear Actuator?

You need to consider a number of parameters before you decide on a specific actuator type, such as the force, speed, and the weight you need your actuator to push or pull. These considerations will ensure you choose the correct actuator for your application.

Top Features to Look for in a High-Quality Electric Linear Actuator

Selecting the right electric linear actuator for your application requires careful consideration of various factors. When choosing a high-quality actuator, look for these features:

• High Load Capacity: The actuator should be able to handle the required load for your application, whether it's a light-duty or heavy-duty electric linear actuator.
• Precision and Accuracy: Choose an actuator with high precision and accuracy, especially if your application demands precise positioning or movement.
• Durability and Material Quality: Opt for actuators made from durable materials, such as stainless steel or aluminum, to ensure longevity and resistance to wear and tear.
• Speed Control: Consider the speed requirements of your application and choose an actuator with adjustable speed control for optimal performance.
• Energy Efficiency: Look for energy-efficient electric linear actuators to minimise power consumption and reduce operating costs.
• Ease of Integration: Choose an actuator that can be easily integrated with your existing control systems and equipment.
• Compact Design: If space is a constraint, consider compact or miniature linear actuators that offer a smaller footprint without compromising performance.
• Quiet Operation: For noise-sensitive environments, opt for actuators that operate quietly to minimise disruption.

Maintenance of Your Electric Linear Actuator

Proper maintenance is essential for ensuring the longevity and optimal performance of your electric linear actuator. Regular inspections, cleaning, and lubrication can prevent premature wear and tear and extend the lifespan of your equipment.

1. Regularly inspect the actuator for any signs of wear and tear, such as loose screws, damaged parts, or unusual noises.
2. Lubricate the moving parts of the actuator, such as the lead screw or ball screw, according to the manufacturer's recommendations. This helps reduce friction and ensures smooth operation.
3. Keep the actuator clean and free from dust, debris, and contaminants that can hinder its performance.
4. Ensure that the actuator is properly aligned to prevent excessive wear and tear on the internal components.
5. Periodically check the electrical connections to ensure they are secure and free from corrosion.
6. Monitor the actuator's performance regularly to identify any signs of deterioration or malfunction.
7. Inspect the wiring and motor for any signs of damage or wear. If necessary, consult a qualified technician for repairs or replacements.

Trusted Electric Linear Actuator Manufacturer, Supplier & Distributor in Australia

RS is a reliable provider of electric linear actuators in Australia. From heavy-duty to piston, small, miniature and micro linear actuators, we carry everything you need from top brands such as Festo, Thomson Linear, Norgren and many more.

Buy Electric Linear Actuators Online from RS

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