Linear actuators Manufacturers online

Linear actuators are mechanical devices that convert rotary movements, electrical, hydraulic or pneumatic forces into linear movements.

They play a crucial role in a variety of areas, such as automation, medical technology, robotics and furniture technology

Below you will find the types of linear actuators and how they work, their areas of application, their advantages and disadvantages and the challenges they present:

Types of linear actuators:

1. Mechanical linear actuators:
Lead screw actuators: Use a screw and a nut to convert rotational motion into linear motion.
Rack and pinion actuators: Combine a gear (pinion) and a rack to create linear motion.

2. Electric linear actuators:
Electromechanical actuators: use an electric motor to drive a spindle or rack.
Piezoelectric actuators: Use piezoelectric materials that expand or contract under tension to produce very precise movements.

3. Hydraulic linear actuators:
Use fluid pressure to move pistons in a cylinder. They provide high force and are ideal for heavy loads.

4. Pneumatic linear actuators:
Use compressed air to move pistons in a cylinder. They are faster and cleaner than hydraulic actuators, but offer less force.

Applications of linear actuators:

1. Automation and robotics:
Industrial robots: Precise control of grippers and tools.
Conveyor belts: Positioning and movement of goods on production lines.

2. Medical technology:
Hospital beds and couches: Position adjustment for patient comfort and medical interventions.
Surgical equipment: Precise movement and control in minimally invasive operations.

3. Vehicle technology:
Seat adjustment: automatic adjustment of the seat position.
Door control: Automatic opening and closing of vehicle doors.

4. Aerospace:
Flaps and control surfaces: precise control of aircraft components.
Satellites: Positioning of solar panels and antennas.

5. Manufacturing and mechanical engineering:
Hydraulic presses are used in manufacturing to shape and process materials.
CNC machines: Precise positioning of tools and workpieces.
Assembly lines: Automated handling and positioning of components.

6. Building services:
Garage doors: Automatic opening and closing.
Sun blinds and venetian blinds: Automated adjustment for light control.

7. Construction and agricultural machinery:
Hydraulic drives are used to lift heavy loads and enable precise movements in construction machinery. They control equipment such as plows, harvesters and other attachments to facilitate work in the field.

8. Consumer electronics:
Projector lifts: automatically raise and lower projectors.
TV lifts: Hiding and extending televisions.

Advantages of linear actuators:

• Precision: High accuracy of movement.
• Power transmission: Efficient transmission of large forces.
• Flexibility: Wide range of applications and customization options.
• Low maintenance: Electric linear actuators in particular require little maintenance.

Challenges and disadvantages:

• Cost: High-precision linear actuators can be expensive.
• Complexity: Some systems are complex and require special controls.
• Environmental dependency: Hydraulic and pneumatic drives can be affected by temperature and pressure conditions.

Here are the most important aspects to look out for when buying linear actuators:

When purchasing a linear actuator, there are several important factors to consider to ensure optimal performance and longevity.

• Electric linear actuators are the most common and offer high precision and efficiency. They are particularly suitable for applications that require clean and quiet movements.
• Pneumatic or hydraulic actuators offer greater forces but are designed for more demanding or heavier applications. However, they can be noisier and are suitable for applications that require high loads.
• The linear actuator must be able to provide sufficient force to move the required load. The rated force (in Newtons) should meet the requirements of the application.
• Make sure that the actuator is designed for the type of load (static or dynamic) and can withstand the continuous load without wear or loss of performance.
• Linear actuators offer different speeds. The choice depends on the application: faster linear actuators are suitable for dynamic applications, while slower ones are ideal for more precise or force-intensive applications.
• In some cases, it can be useful to be able to adjust the speed of the actuator flexibly.
• This indicates how far the linear actuator can move in a linear direction. Choose a stroke length that meets the requirements of your application.
• For versatile applications, it may make sense to choose an actuator with a variable stroke length.
• If high precision is required, linear actuators with accurate positioning should be chosen, especially in automation and robotics.
• Many linear actuators can be controlled via control systems (e.g. PLC) to perform precise movements or specific automation.
• The linear actuator should be easy to mount. Look for standardized mounting points that fit your application.
• The physical size of the linear actuator must fit into the available installation space. Also consider the space required for the entire stroke.
• Pay attention to the protection class (e.g. IP65 for dust and splash water protection), especially if the linear actuator is used in harsh or damp environments.
• The linear actuator should be designed for the planned operating temperatures, whether in extreme cold or hot environments.
• Find out about the service life of the actuator in operating cycles. High-quality linear actuators have a long service life and require less maintenance.
• Make sure that the actuator can be easily maintained, for example by simple lubrication or replacement of wearing parts.
• In noise-sensitive environments, such as in medical technology or residential areas, a quiet drive is an advantage. Electric drives are often quieter here than hydraulic or pneumatic drives.
• Many linear actuators have limit switches that ensure that the actuator is stopped as soon as the end position is reached to prevent damage.
• Integrated overload protection prevents the actuator from being damaged or jamming in the event of an overload.
• Look out for long warranty periods and reliable customer support, especially for complex applications.

When purchasing a linear actuator, factors such as force, stroke length, speed, precision, protection class and actuator type are decisive. Choose an actuator that is adapted to the specific requirements of your application to ensure reliable and long-lasting performance. A good maintenance concept and safety features also contribute to the efficiency and longevity of the actuator.

Linear actuators can be purchased from various suppliers. You will find comprehensive information on manufacturers and suppliers of Linear drives around the world on Exportpages.