Choosing a high-speed linear actuator is not just about finding the fastest model. The right actuator also needs enough force, the correct stroke length, compatible voltage and controls, a suitable duty cycle, and the right level of position control for the application. This is especially important because speed and force usually work against each other. In many electric linear actuators, a faster actuator will provide less force than a slower model using a similar motor and drive design. If the actuator also needs precise positioning, programmable movement, or feedback, you may need a linear servo actuator instead of a simple high-speed actuator. This article explains how high-speed linear actuators work, how they differ from linear servo actuators, and how to choose the right Progressive Automations product path for your project.
What Is a High-Speed Linear Actuator?
A high-speed linear actuator is an actuator designed to move a shaft or rod quickly in a straight line. It converts electrical energy into rotary motor motion, then converts that rotation into linear extension and retraction through a lead screw, gear, or other drive mechanism.
High-speed actuators are useful when the application needs rapid motion and moderate load handling. Common examples include fast-moving doors, vents, hatches, robotics mechanisms, sorting systems, simulation equipment, agricultural equipment, and home automation projects.
There is no single universal industry standard that defines the minimum speed required for an actuator to be called “high speed.” Manufacturers usually classify high-speed actuators based on their own product lineup, motor design, gearing, load rating, and no-load or full-load speed.
Positional Feedback & Precision Movement Considerations
A high-speed linear actuator is usually selected when fast extension and retraction are the main goals. It may use built-in limit switches to stop at each end of the stroke, but it may not provide precise intermediate positioning.
A linear actuator with positional feedback is selected when controlled positioning matters. These are common in robotics, medical devices, lab automation, manufacturing fixtures, and compact motion-control systems.
- Choose a high-speed actuator when speed is the priority.
- Choose a linear servo when precision and programmable position control are the priority.
- Choose a feedback actuator or synchronized system when multiple actuators must move together.
Speed vs Force: The Key Tradeoff
Before choosing a high-speed actuator, understand the relationship between speed and force. For many electric actuators, higher speed means lower available force. A slower actuator can often provide more pushing or pulling force because of gearing and screw design.
That means the fastest actuator is not always the best actuator. If the load is too heavy, the actuator may slow down, draw more current, overheat, fail to move the load reliably, or operate outside its intended duty cycle.
When comparing actuator speed, look at both:
- No-load speed: how fast the actuator moves without a load.
- Full-load speed: how fast it moves while carrying its rated load.
Full-load speed is usually the more useful number for real applications.
How to Choose the Right High-Speed Actuator
1. Required Speed
Start with the motion requirement. How quickly does the actuator need to complete the stroke? A fast hatch, vent, sorting gate, or simulator may need a much higher speed than a furniture or positioning application.
2. Required Force
Calculate the actual load. Include the moving object, brackets, hinges, friction, leverage, and any resistance from the mechanism. If the actuator is mounted at an angle or driving a lever, the required actuator force may be much higher than the visible object weight.
3. Stroke Length
Stroke length is the distance the actuator needs to extend. Choose a stroke that reaches the required open and closed positions without bottoming out the actuator or overextending the mechanism.
4. Duty Cycle
Duty cycle defines how long the actuator can run compared with how long it must rest. High-speed actuators often use brushed DC motors, which can generate heat during operation. Always check the duty cycle before using an actuator in repeated or continuous-motion applications.
5. Voltage and Current
Make sure the actuator voltage matches the power supply and controller. Also check full-load current draw. A controller or power supply that cannot support the actuator’s current requirements may cause unreliable operation.
6. Feedback and Position Control
If the actuator only needs to move fully in and fully out, built-in limit switches may be enough. If it needs to stop at exact intermediate positions, synchronize with another actuator, or follow programmed motion commands, choose a feedback or servo-style actuator.
7. Environment
Check IP rating, operating temperature, mounting orientation, exposure to dust or moisture, and whether the actuator will be used indoors or outdoors.
PA-ST1: IP66 High Speed Linear Actuator
The PA-ST1 is a tubular linear actuator with 12 VDC brushed DC motors that has been designed for high speed performance. The stroke ranges from 1" to 24" options while offering a 56 lbs dynamic and 225 lbs static force rating. Capable of outdoor installations, the PA-ST1 has an IP66 ingress protection rating against exposure to dust and water. Most importantly, this is our fastest model actuator with a 5.90"/sec no-load speed and 4.72"/sec full-load speed.
Choose PA-ST1 when the project needs fast linear movement, moderate force, outdoor or dusty/moisture-prone operation, simple extend/retract control, a tubular form factor, and built-in end-of-stroke limit switches.
Do not choose PA-ST1 when the project needs precise intermediate positioning, feedback, synchronized multi-actuator movement, heavy-load motion beyond the product rating, or continuous-duty operation.
Applications for High-Speed Linear Actuators
| Application | Why Speed Matters | Product Direction |
|---|---|---|
| Sorting gates | Fast open/close cycles | PA-ST1 if force and duty cycle fit |
| Vents and hatches | Quick deployment | PA-ST1 or custom actuator |
| Agricultural mechanisms | Fast adjustment in outdoor conditions | PA-ST1 if specs match or industrial actuators |
| Home automation | Fast movement for doors, panels, or hidden features | PA-ST1 or standard actuator depending on load |
| Simulators | Responsive motion | Engineering review recommended |
| Robotics mechanisms | Fast movement or precise micro motion | PA-ST1 for speed, micro actuators for better precision |
| Medical or lab devices | Compact controlled positioning | PA-12-T or PA-12-R |
Frequently Asked Questions
What is considered a high-speed linear actuator?
There is no universal speed threshold for a high-speed linear actuator. Manufacturers usually define high-speed models relative to their own actuator lineup. Always compare no-load speed, full-load speed, force, stroke, and duty cycle.
Is a linear servo the same as a high-speed actuator?
No. A linear servo is designed for controlled positioning and programmable motion. A high-speed actuator is designed primarily for fast extension and retraction. Some applications need speed, some need precision, and some need both.
Does a faster linear actuator have less force?
Often, yes. In many electric linear actuators, higher speed comes with lower force because of motor, screw, and gearing choices. Always compare speed and force together.
Can I change the speed of a linear actuator?
In some systems, speed can be adjusted with compatible PWM controllers, voltage control, or custom drive design. However, changing voltage or control methods can affect force, current draw, heat, and actuator life. Stay within the product’s rated operating conditions.
Does PA-ST1 have feedback?
No. The PA-ST1 uses built-in non-adjustable limit switches for end-of-stroke control and no positional feedback.
Which actuator should I choose for precise position control?
For compact precision positioning, review our PA-12-T or PA-12-R Micro Precision Servo Actuators.
What should I verify before ordering?
Verify force, stroke, speed under load, duty cycle, voltage, current draw, feedback needs, control compatibility, mounting brackets, IP rating, operating temperature, and whether the actuator will experience side loading.
In Summary
Choose a high-speed linear actuator when fast linear motion is the priority, and the load, stroke, duty cycle, voltage, current, and environment fit the actuator’s ratings. When the application needs precise programmable positioning or feedback, consider feedback options available in categories such as standard and compact actuators.
Whether you're an engineer designing OEM equipment, a fabricator building custom machinery, or a DIY enthusiast creating your next big project, our broad range of linear actuators will offer something for nearly any application. Explore the PA-ST1 and our custom actuator solutions to unlock new levels for your next automation project.
sales@progressiveautomations.com | 1-800-676-6123