What is a Linear Actuator

 

Introduction

Linear Actuators are the muscles of machines. They’re the devices that make things move—whether lifting a load, rotating a gear, or adjusting a surface. Motion comes in many forms: linear, rotary, vibratory, or circular. Each motion type needs a specific kind of actuator. At FIRGELLI, we specialize in linear actuators—refined over years to support engineers, hobbyists, and automation innovators worldwide.

What is a linear actuator? A linear actuator is a type of actuator that creates straight-line motion—unlike rotary actuators that spin. Picture a drawer opening, a lever extending, or a TV lifting from a cabinet. A linear actuator takes energy—electricity, air, hydraulics—and converts it into controlled linear movement. Whether lifting heavy equipment or gently shifting components, linear actuators are vital for precise, reliable motion.

Linear actuators can push, pull, or both—depending on the mechanism. Their range spans from robust and rugged (e.g. car jacks) to ultra-precise (e.g. piezoelectric actuators in microscopes). At FIRGELLI, our C-Series Actuators offer the best of both: strength and accuracy. They’re used in smart furniture, printers, valves, robotics, and much more. If something needs to move in a straight line—chances are a linear actuator is behind it.

Want to learn how they work, what types are available, and how to choose the right one? Let’s break it down step by step—and show why FIRGELLI actuators are trusted by engineers around the world.

How Linear Actuators Work

A linear actuator is more than one part—it's a system that converts energy into controlled motion. Whether you’re lifting solar panels or automating a trapdoor, every component plays a role. Here’s how it works:

· Power Supply: Linear actuators need energy to move. Electric models—like our Mini Linear Actuators—run on 12V or 24V DC. Mechanical actuators use manual power (like cranks), while hydraulic and pneumatic actuators rely on fluid or air pressure. FIRGELLI’s electric actuators are clean, efficient, and plug-and-play—no pumps or compressors needed.

· Power Converter: This component translates input energy into usable motion. In electric actuators, it’s often a motor spinning a lead screw. Our Heavy Duty Linear Actuators use a high-torque motor to drive a screw, creating linear movement. Hydraulic models use pistons; pneumatic ones use compressed air. Add a Control Box for precision control.

· Mechanical Load: This is the object being moved—whether it's a trapdoor, monitor, or hatch. The actuator must be rated to handle the load. FIRGELLI offers actuators for every need—from compact 20 lb actuators to high-force 400+ lb models. Use our Actuator Force Calculator to find your match.

· Control Device: You need a way to command motion—like switches, sensors, or smart systems. A rocker switch toggles movement; for more advanced control, try an Arduino or a FIRGELLI Control System. For a beginner’s guide, read: How to Control a Linear Actuator with a Switch.

TL;DR – What is a Linear Actuator?

• Linear actuators create straight-line motion using electric, hydraulic, pneumatic, or mechanical energy.
• They are used in home automation, robotics, industrial machinery, and more.
• FIRGELLI offers electric linear actuators for clean, precise, and reliable motion control.
• Choose based on force, speed, stroke length, duty cycle, and environment.
• Explore the full range at FIRGELLI Linear Actuators.