Captive Lead Screw Linear Actuator Motor Assembly

Captive Lead Screw Linear Actuators

Captive lead screw linear actuators are motorized assemblies that convert rotary motion into linear motion by fixing the lead screw in place while the nut moves along it. The motor is integrated into one end of the actuator and directly drives the screw, causing the nut to translate linearly to push or pull the load. This configuration creates a compact, mechanically stable system that simplifies integration into machines. To ensure long-term accuracy and durability, each unit incorporates angular contact bearings directly within the motor housing, increasing thrust capacity, reducing deflection, and controlling runout. Factory preloaded bearings eliminate axial clearance to maintain consistent positioning accuracy and minimize backlash over time. Available in five NEMA frame sizes—08, 11, 14, 17, and 23—these actuators support a wide range of performance upgrades in the form of motion control applications like Smart Motor Technology which can provide up to 50% higher output torque for faster cycle times and improved productivity without increasing footprint.

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Captive Lead Screw Linear Actuators

20 products
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20 products
Lead Screw Linear Actuator with a 16mm screw diameter, 1mm lead, and 300mm length, featuring a Round Anti-Backlash Nut and a NEMA 23 Single Stack Motor (56mm), pairing a quality screw made of stainless steel with a PTFE coating to minimize friction and prevent flaking with an innovative Anti-Backlash Nut..
$228.17
Lead Screw Linear Actuator with a 0.138mm screw diameter, 0.024 lead, and 25.4mm stroke. The leadscrew drives an integral plunger in and out. Stroke: 25.4 mm Motor: NEMA 08 Diameter: 0.138 in Lead: 0.024 in
$214.22
Lead Screw Linear Actuator with a 1/4mm screw diameter, 1/2 lead, and 25.4mm stroke. The leadscrew drives an integral plunger in and out. Stroke: 25.4 mm Motor: NEMA 17 Diameter: 1/4 in Lead: 1/2 in
$183.88
Lead Screw Linear Actuator with a 0.188mm screw diameter, 0.025 lead, and 25.4mm stroke. The leadscrew drives an integral plunger in and out. Stroke: 25.4 mm Motor: NEMA 11 Diameter: 0.188 in Lead: 0.025 in
$191.82
Lead Screw Linear Actuator with a 1/4mm screw diameter, 1/2 lead, and 25.4mm stroke. The leadscrew drives an integral plunger in and out. Stroke: 25.4 mm Motor: NEMA 14 Diameter: 1/4 in Lead: 1/2 in
$203.37
Lead Screw Linear Actuator with a 3/8mm screw diameter, 1/5 lead, and 25.4mm stroke. The leadscrew drives an integral plunger in and out. Stroke: 25.4 mm Motor: NEMA 23 Diameter: 3/8 in Lead: 1/5 in
$227.28
Lead Screw Linear Actuator 400mm long with a NEMA 23 Motor, Round Anti-Backlash Nut, 16mm 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 uses a spring..
$257.70
Lead Screw Linear Actuator 500mm long with a NEMA 23 Motor Single Stack (56mm), Round Anti-Backlash Nut, 16mm 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..
$266.49
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
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
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
Lead Screw Linear Actuator with a NEMA 8 motor, a Round Anti-Backlash Nut, 6mm screw diameter, 1mm lead, and a length of 100mm. The screw is made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Constant Force™ Anti-Backlash nut uses a spring to maintain..
$212.91

Captive Lead Screw Linear Actuators

20 products

Captive lead screw linear actuators are motorized assemblies that convert rotary motion into linear motion by fixing the lead screw in place while the nut moves along it. The motor is integrated into one end of the actuator and directly drives the screw, causing the nut to translate linearly to push or pull the load. This configuration creates a compact, mechanically stable system that simplifies integration into machines. To ensure long-term accuracy and durability, each unit incorporates angular contact bearings directly within the motor housing, increasing thrust capacity, reducing deflection, and controlling runout. Factory preloaded bearings eliminate axial clearance to maintain consistent positioning accuracy and minimize backlash over time. Available in five NEMA frame sizes—08, 11, 14, 17, and 23—these actuators support a wide range of performance upgrades in the form of motion control applications like Smart Motor Technology which can provide up to 50% higher output torque for faster cycle times and improved productivity without increasing footprint.

Key Features:

  • Five frame sizes: NEMA 08, 11, 14, 17, and 23
  • Multiple lead screw and nut combinations available per frame size
  • Available with standard and anti-backlash nuts
  • Three nut styles offer design flexibility: round, square and triangular
  • Larger bearing design increases thrust capacity and service life
  • Preloaded bearings eliminate axial play for improved positioning accuracy
  • Optional Smart Motor Technology for up to 50% more torque