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A linear actuator is a mechanical device that integrates a linear guide with a drive mechanism (such as a screw, belt, or piston) and a power source to convert rotary or fluid power into controlled straight-line motion, enabling precise positioning of loads. They are typically classified as pneumatic, hydraulic, electric, or mechanical, with electric and mechanical designs increasingly favored for their higher positioning accuracy, repeatability, cleanliness, and ease of system integration. At PBC Linear, our engineers specialize in mechanical and electric linear actuators, building them around high-performance drive systems such as ball screws, lead screws, and belt drives, in both NEMA motor-driven and hand-crank assemblies.
Belt-driven actuators support long strokes and high speeds with minimal maintenance; ball screw-driven designs provide high accuracy and load capacity for demanding positioning; and lead screw-driven actuators offer a cost-effective, quiet solution with options such as anti-backlash nuts for improved repeatability. These systems are available in a wide range of configurations, including multiple screw diameters, lead sizes, NEMA frame options, and actuator lengths to meet specific force, speed, and travel requirements. Carriage guidance is provided by either self-lubricating Gliding Surface Technology for low-maintenance operation in harsh environments such as with dirt, heat and vibration, or ball bearing profile rails for higher moment capacity and cantilevered loads. Together these configurations span applications from miniature to heavy-duty systems, supporting loads up to 83,400 N (18,750 lb) and strokes up to 6,000mm (236 in).
Frequently Asked Questions
What is a linear actuator?
How does a linear actuator work?
What are the main types of linear actuators?
What is the difference between a lead screw and a ball screw actuator?
What is the difference between belt-driven and screw-driven actuators?
When should a linear actuator be used instead of a cylinder?
Do linear actuators require maintenance?
What factors should be considered when selecting a linear actuator?
What provides guidance in a linear actuator?
What are linear actuators used for?
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