Linear Actuators

Linear Actuators

A linear actuator is a mechanical device that combines a linear guide, drive mechanism, carriage-guidance system, and power source to produce controlled straight-line motion for moving or positioning a load. The drive mechanism—such as a ball screw, lead screw, belt, or fluid-powered piston—creates linear force, while the guidance system supports the carriage, controls its path, and resists side, moment, and cantilevered loads. Linear actuators are commonly classified as electric, mechanical, pneumatic, or hydraulic; electric and mechanical designs are often selected for controlled positioning, repeatability, clean operation, and integration with automated machinery.

PBC Linear designs guided belt-driven and screw-driven actuators powered by NEMA motors or hand cranks. Belt-driven actuators support long strokes and high speeds with low maintenance. Ball screw actuators provide high efficiency, load capacity, and positioning accuracy, while lead screw actuators offer quieter, more cost-effective motion with anti-backlash options for improved repeatability. Screw-driven configurations include external-nut actuators, where the screw rotates and a restrained nut travels along it; captive actuators, where the nut rotates and pushes a non-rotating screw in and out; and non-captive actuators, where the rotating nut travels along a screw that passes through the motor. Available configurations include multiple screw diameters, lead sizes, NEMA frame sizes, motor lengths, and actuator lengths to match specific force, speed, and travel requirements. Carriage guidance is provided by either self-lubricating Gliding Surface Technology for low-maintenance operation in environments with dirt, heat, or vibration, or ball-bearing profile rails for greater moment capacity and cantilevered loads.

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228 products
Drive End Shaft
Motor Option NEMA17 Motor Mount
Rail Length 130mm
Number Of Carriages 1
$776.78
Lead screw linear actuator featuring a NEMA 17 motor with a hardened, ceramic-coated rail length of 140mm and an anodized aluminum carriage underlined with self-lubricating maintenance-free FrelonGold® to create a smooth Gliding Surface Technology™ (GST) effect that can easily withstand hot, dirty, or high vibration conditions. The lead screw has..
$778.99
Lead Screw Linear Actuator with a 12mm screw diameter, 5mm lead, and 500mm length, featuring a Round Anti-Backlash Nut and a NEMA 17 Motor, pairing a quality screw made of stainless steel with a PTFE coating to minimize friction and prevent flaking with an innovative Anti-Backlash Nut incorporating ConstantForce™ technology...
$261.90
Drive End NEMA17 Single Stack
Motor Option NEMA17 Single Stack
Rail Length 200mm
Number Of Carriages 1
$630.16
Lead screw linear actuator with a hardened, ceramic-coated rail length of 140mm, featuring a NEMA 17 motor mount and an anodized aluminum carriage underlined with self-lubricating maintenance-free FrelonGold® to create a smooth Gliding Surface Technology™ (GST) effect that can easily withstand hot, dirty, or high vibration conditions. The lead screw..
$685.40
Drive End NEMA17 Motor Mount
Motor Option NEMA17 Motor Mount
Rail Length 510mm
Number Of Carriages 1
$737.48
Drive End NEMA17 Single Stack
Motor Option NEMA17 Single Stack
Rail Length 80mm
Number Of Carriages 1
$589.60
Lead Screw Linear Actuator 400mm long with a NEMA 17 Motor Single Stack (43mm), Round Anti-Backlash Nut, 12mm screw diameter, 5mm lead size, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking and reduce friction. The Round Constant Force™ Anti-Backlash nut..
$217.95
Lead Screw Linear Actuator 300mm long with a NEMA 17 Motor Single Stack (43mm), Round Anti-Backlash Nut, 12mm screw diameter, 1mm lead size, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking and reduce friction. The Round Constant Force™ Anti-Backlash nut..
$198.80
Lead Screw Linear Actuator 400mm long with a NEMA 14 Motor, Triangle Anti-Backlash Nut, 10mm screw diameter, 5mm lead size, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking and reduce friction. The Triangle Constant Force™ Anti-Backlash nut uses a spring..
$236.39
Lead Screw Linear Actuator 300mm long with a NEMA 23 Motor, Triangle Anti-Backlash Nut, 10mm screw diameter, 1mm lead, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking and reduce friction. The Triangle Constant Force™ Anti-Backlash nut uses a spring to..
$217.23
Lead Screw Linear Actuator 200mm long with a NEMA 14 Motor, RoundAnti-Backlash Nut, 10mm screw diameter, 5mm lead, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking and reduce friction. The Triangle Constant Force™ Anti-Backlash nut uses a spring to maintain..
$198.07
Non-Captive Lead Screw Linear Actuator 300mm long with a NEMA 23 Motor, Non-Captive Round Anti-Backlash Nut, 10mm screw diameter, 10mm lead, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking and reduce friction. The Round Constant Force™ Anti-Backlash nut uses a..
$219.09
Non-Captive Lead Screw Linear Actuator 300mm long with a NEMA 23 Motor, Non-Captive Round Anti-Backlash Nut, 10mm screw diameter, 5mm lead, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking and reduce friction. The Round Constant Force™ Anti-Backlash nut uses a..
$219.09
Non-Captive Lead Screw Linear Actuator 300mm long with a NEMA 23 Motor, Non-Captive Round Anti-Backlash Nut, 10mm screw diameter, 1mm lead, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking and reduce friction. The Round Constant Force™ Anti-Backlash nut uses a..
$219.09
Lead Screw Actuator with a 6mm screw diameter, 300mm length, powered by a NEMA 11 motor. Features a 5mm lead, right-hand clockwise thread and a rectangle anti-backlash nut for smooth, play-free operation. A PTFE coating minimizes friction, prevents flaking and ensures durability. Length: 300mm Screw Diameter: 6mm Lead: 5mm Lead..
$234.92
Lead Screw Actuator with a 6mm screw diameter, 250mm length, powered by a NEMA 11 motor. Features a 5mm lead, right-hand clockwise thread and a rectangle anti-backlash nut for smooth, play-free operation. A PTFE coating minimizes friction, prevents flaking and ensures durability. Length: 250mm Screw Diameter: 6mm Lead: 5mm Thread..
$225.34
Lead Screw Actuator with a 6mm screw diameter, 100mm length, powered by NEMA 11 motor. Features a 1mm lead, right-hand clockwise thread and a rectangle anti-backlash nut for smooth, play-free operation. A PTFE coating minimizes friction, prevents flaking and ensures durability. Nut Type: Rectangle AntiBacklash Nut, Motor: Nema 11 Motor..
$196.60
Lead Screw Linear Actuator 250mm long with a NEMA 8 Motor, Rectangle Anti-Backlash Nut, 6mm screw diameter, 5mm lead, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Rectangle Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial..
$241.65
Lead Screw Linear Actuator 200mm long with a NEMA 8 Motor, Rectangle Anti-Backlash Nut, 6mm screw diameter, 1mm lead, and the screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Rectangle Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial..
$232.07

Linear Actuators

228 products
Linear Actuators Overview

A linear actuator is a mechanical device that combines a linear guide, drive mechanism, carriage-guidance system, and power source to produce controlled straight-line motion for moving or positioning a load. The drive mechanism—such as a ball screw, lead screw, belt, or fluid-powered piston—creates linear force, while the guidance system supports the carriage, controls its path, and resists side, moment, and cantilevered loads. Linear actuators are commonly classified as electric, mechanical, pneumatic, or hydraulic; electric and mechanical designs are often selected for controlled positioning, repeatability, clean operation, and integration with automated machinery.

PBC Linear designs guided belt-driven and screw-driven actuators powered by NEMA motors or hand cranks. Belt-driven actuators support long strokes and high speeds with low maintenance. Ball screw actuators provide high efficiency, load capacity, and positioning accuracy, while lead screw actuators offer quieter, more cost-effective motion with anti-backlash options for improved repeatability. Screw-driven configurations include external-nut actuators, where the screw rotates and a restrained nut travels along it; captive actuators, where the nut rotates and pushes a non-rotating screw in and out; and non-captive actuators, where the rotating nut travels along a screw that passes through the motor. Available configurations include multiple screw diameters, lead sizes, NEMA frame sizes, motor lengths, and actuator lengths to match specific force, speed, and travel requirements.

Carriage guidance is provided by either self-lubricating Gliding Surface Technology for low-maintenance operation in environments with dirt, heat, or vibration, or ball-bearing profile rails for greater moment capacity and cantilevered loads.

  • Guided belt-driven, ball screw, and lead screw actuator options
  • External-nut, captive, and non-captive screw configurations
  • NEMA motor-driven and hand-crank models
  • Multiple screw diameters, leads, motor lengths, and frame sizes
  • Choose Self-lubricating Gliding Surface Technology for dirt, heat, and vibration or ball-bearing profile rail guidance for higher moment and cantilevered loads
  • Load capacities up to 83,400N (18,750lb)
  • Stroke lengths up to 6,000mm (236in)
  • Miniature through heavy-duty actuator systems

Frequently Asked Questions

What is a linear actuator?
A linear actuator is a device that produces controlled straight-line motion by converting rotational or input force into linear movement. It is commonly used in automation, machinery, and positioning systems to move or position loads.
How does a linear actuator work?
A linear actuator works by converting motion from a motor, screw, or belt drive into linear movement. As the drive mechanism rotates or moves, it advances a carriage or rod along a guided path to produce controlled motion.
What are the main types of linear actuators?
The main types of linear actuators are electric, mechanical, pneumatic, and hydraulic. Electric and mechanical actuators are often preferred for their precision, cleanliness, and ease of integration, while pneumatic and hydraulic actuators are typically used for higher force applications.
What is the difference between a lead screw and a ball screw actuator?
Lead screw actuators use sliding contact between the screw and nut, making them quieter and more cost-effective, while ball screw actuators use rolling elements to reduce friction, providing higher efficiency, accuracy, and load capacity.
What is the difference between belt-driven and screw-driven actuators?
Belt-driven actuators are designed for long travel distances and higher speeds with lower cost and maintenance, while screw-driven actuators provide greater accuracy, stiffness, and load capacity for precise positioning applications.
When should a linear actuator be used instead of a cylinder?
Linear actuators are preferred when precise positioning, repeatability, and controlled motion are required, while pneumatic or hydraulic cylinders are typically used for simple extension and retraction with higher force but less control.
Do linear actuators require maintenance?
Maintenance depends on the design. Screw-driven actuators may require periodic lubrication, while some systems use self-lubricating materials or low-maintenance designs to reduce service requirements.
What factors should be considered when selecting a linear actuator?
Key factors include load capacity, speed, stroke length, required precision, environmental conditions, mounting configuration, and the type of drive mechanism used.
What provides guidance in a linear actuator?
Guidance in a linear actuator is provided by linear bearings or guide systems that support the carriage and maintain alignment. These may include sliding-contact guides for low maintenance or rolling-element guides for higher load and rigidity.
What are linear actuators used for?
Linear actuators are used in applications such as automation, material handling, packaging equipment, medical devices, and positioning systems where controlled linear motion is required.