Selecting the right linear actuator is one of the most important decisions when designing or upgrading a motion control system. The correct choice will improve performance, maximise reliability and reduce maintenance, while the wrong specification can lead to premature wear, poor efficiency and costly downtime.
Whether you’re developing new equipment or replacing an existing component, understanding the key specification requirements will help ensure you choose the most suitable solution for your application.
1. Determine the Required Load
The first consideration is the amount of force the actuator will need to move.
This includes not only the weight of the load itself but also any additional resistance caused by friction, acceleration or external forces acting on the system. It’s important to consider both static loads (when stationary) and dynamic loads (while moving), as these can differ significantly.
Choosing an actuator with insufficient load capacity can reduce performance and shorten its service life.
2. Calculate the Stroke Length
The stroke length is the total distance the actuator needs to travel.
Selecting the correct stroke ensures the required movement is achieved without unnecessary travel, helping to optimise efficiency and reduce cycle times. While it may be tempting to specify a longer stroke “just in case”, doing so can increase cost and impact overall performance.
Accurate measurements during the design stage will help determine the ideal stroke for your application.
3. Consider Speed Requirements
Different applications demand different operating speeds.
Some industrial automation systems require rapid positioning, while others prioritise smooth, controlled movement. The required speed should always be assessed alongside the load, as higher loads can affect achievable travel speeds.
Balancing speed and force is essential to achieving reliable and consistent performance.
4. Understand the Duty Cycle
The duty cycle refers to how often the actuator is expected to operate within a given period.
Applications running continuously throughout the day place far greater demands on components than equipment used only occasionally. Selecting an actuator designed for the expected workload helps prevent overheating, excessive wear and unnecessary maintenance.
Understanding your operating cycle is particularly important in manufacturing, packaging and automated production environments.
5. Assess the Operating Environment
Environmental conditions play a significant role in actuator selection.
Consider whether the equipment will operate indoors or outdoors, and whether it will be exposed to dust, moisture, chemicals, extreme temperatures or washdown procedures. These factors will influence the level of environmental protection required.
For demanding environments, choosing an actuator with the appropriate IP rating helps ensure long-term reliability and performance.
6. Choose the Right Power Supply
Linear actuators are available with various voltage and power options to suit different applications.
The correct choice will depend on the equipment’s electrical system, available power supply and control requirements. Ensuring compatibility from the outset simplifies installation and reduces the risk of future modifications.
Working with an experienced supplier can help identify the most appropriate solution for your project.
7. Don’t Overlook Mounting and Installation
Correct mounting is essential for efficient operation.
The mounting arrangement should allow the actuator to move freely while maintaining proper alignment throughout its travel. Poor installation or misalignment can increase wear on internal components and reduce the lifespan of the system.
Considering mounting requirements during the design phase can prevent costly issues once equipment is commissioned.
Why Work with a Specialist?
Every application presents its own engineering challenges, and selecting the right component involves more than comparing product specifications.
At CRD Devices, we work closely with customers across a wide range of industries to specify linear actuators that meet the exact requirements of their application. By considering load, stroke, speed, duty cycle, environmental conditions and installation requirements, we help engineers identify reliable, long-lasting solutions that deliver optimum performance.
Whether you require a standard actuator or a bespoke motion control solution, our experienced team can provide expert guidance from initial specification through to manufacture and supply.