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Home / Products Centre / Linear Stepper Motor / Captive Linear Stepper Motor

Captive Linear Stepper Motor

What is a Captive Linear Stepper Motor?

A captive linear stepper motor is a type of stepper motor that is specifically designed to produce linear motion rather than rotational motion. The term "captive" refers to the motor's integrated nut that is "captured" or held in place by a housing or sleeve. This design ensures that the nut moves along the lead screw but does not disengage or rotate independently, offering precise and consistent linear movement.

The stepper motor's rotor is typically energized in discrete steps, causing the attached nut to travel along the threaded lead screw, converting rotational motion into linear displacement. The captive design minimizes backlash and provides smooth and reliable motion, which is essential for applications that require high accuracy.

 

BesFoc External T-type Linear Stepper Motor

BesFoc offers four different lead screw rods, including external T-type lead screw, external ball screw, captive and non captive lead screw, linear motor sizes from neam 8 11 14 17 23 24 34.

Push rod linear stepper motor

NEMA 8 Captive Linear Stepper Motor

NEMA8 (20mm) Captive Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The nut is made of polymer material, self-lubricating and maintenance-free. At the same time, we provide a variety of motor lengths, a variety of screw leads, and a variety of screw strokes for customers to choose freely.
Optional: Connector...
Model Step Angle Phase Shaft Type Wires Body Length Current Resistance Inductance Holding Torque Leads No Rotor Inertia Weight
(°) / / / (L)mm A Ω mH N.cm No. g.cm2 Kg
BF20HSK30-0604 1.8 2 Linear Actuator Connector 30 0.6 6.5 1.7 1.8 4 2 0.05
BF20HSK38-0604 1.8 2 Linear Actuator Connector 38 0.6 9 3 2.2 4 3 0.08
nema 11 captive linear stepper motor

NEMA 11 Captive Linear Stepper Motor

NEMA11 (28mm) Captive Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The nut is made of polymer material, self-lubricating and maintenance-free. At the same time, a variety of motor lengths, screw leads, and screw strokes are provided for customers to choose freely.
Optional: Connector...
Model Step Angle Phase Shaft Type Wires Body Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / / (L)mm A Ω mH N.cm No. g.cm2 Kg
BF28HSK32-0674 1.8 2 Linear Actuator Direct wire 32 0.67 5.6 3.4 6 4 9 0.11
BF28HSK45-0674 1.8 2 Linear Actuator Direct wire 45 0.67 6.8 4.9 9.5 4 12 0.14
BF28HSK51-0674 1.8 2 Linear Actuator Direct wire 51 0.67 9.2 7.2 12 4 18 0.2
Push rod linear stepper motor

NEMA 17 Captive Linear Stepper Motor

NEMA17 (42mm) Captive Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The nut is made of polymer material, self-lubricating and maintenance-free. At the same time, a variety of motor lengths, screw leads, and screw strokes are provided for customers to choose freely.
Optional: Connector...
Model Step Angle Phase Shaft Type Wires Body Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / / (L)mm A Ω mH N.cm No. g.cm2 Kg
BF42HSK34-1334 1.8 2 Linear Actuator Direct wire 34 1.33 2.1 2.5 26 4 34 0.22
BF42HSK40-1704 1.8 2 Linear Actuator Direct wire 40 1.7 1.5 2.3 42 4 54 0.28
BF42HSK48-1684 1.8 2 Linear Actuator Direct wire 48 1.68 1.65 2.8 44 4 68 0.35
BF42HSK60-1704 1.8 2 Linear Actuator Direct wire 60 1.7 3 6.2 7.3 4 102 0.55
Push rod linear stepper motor

NEMA 23 Captive Linear Stepper Motor

NEMA23 (57mm) Captive Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The nut is made of polymer material, self-lubricating and maintenance-free. At the same time, a variety of motor lengths, screw leads, and screw strokes are provided for customers to choose freely.
Optional: Connector...
Model Step Angle Phase Shaft Type Wires Body Length Current Resistance Inductance Holding Torque Leads No. Rotor Inertia Weight
(°) / / / (L)mm A Ω mH Nm No. g.cm2 Kg
BF57HSK41-2804 1.8 2 Linear Actuator Direct wire 41 2.8 0.7 1.4 0.55 4 150 0.47
BF57HSK51-2804 1.8 2 Linear Actuator Direct wire 51 2.8 0.83 2.2 1.01 4 230 0.59
BF57HSK56-2804 1.8 2 Linear Actuator Direct wire 56 2.8 0.9 2.5 1.26 4 280 0.68
BF57HSK76-2804 1.8 2 Linear Actuator Direct wire 76 2.8 1.1 3.6 1.89 4 440 1.1
BF57HSK82-3004 1.8 2 Linear Actuator Direct wire 82 3.0 1.2 4.0 2.1 4 600 1.2
BF57HSK100-3004 1.8 2 Linear Actuator Direct wire 100 3.0 0.75 3.0 3.0 4 700 1.3
BF57HSK112-3004 1.8 2 Linear Actuator Direct wire 112 3.0 1.6 7.5 3.0 4 800 1.4

How Does a Captive Linear Stepper Motor Work?

The operation of a captive linear stepper motor involves several key components that work together to produce precise linear movement:

1. Stepper Motor Activation: 

The stepper motor is an electric motor that operates in discrete steps. It is energized by a controller that sends electrical pulses to the motor’s coils, generating a rotating magnetic field. This magnetic field attracts and repels the rotor, causing it to move in precise, small increments.

2. Lead Screw and Nut: 

The lead screw is a threaded shaft that interacts with the nut, which is captured within the motor housing. As the motor rotates, the nut travels along the lead screw. The nut is fixed in place within the housing, meaning it cannot rotate freely but instead moves linearly with each step the motor takes.

3. Linear Motion: 

Each electrical pulse moves the nut along the lead screw by a fixed distance, resulting in precise linear displacement. The stepper motor's ability to move in discrete steps ensures that the nut moves at exact intervals, allowing for accurate and repeatable positioning.

4. Backlash Control: 

The captive design reduces or eliminates backlash, which can occur in non-captive systems where the nut can potentially slip or rotate independently. The captive nut is held in place, ensuring accurate and repeatable motion.

5. Efficiency and Smoothness: 

The integration of the lead screw and nut with the stepper motor provides high efficiency with minimal friction. The combination of these elements results in smooth, reliable movement, even under heavy loads.
 

Why Choose a Captive Linear Stepper Motor?

The captive linear stepper motor is an ideal choice for applications that demand precision, reliability, and minimal backlash. Its simple, yet effective design ensures that you get accurate, repeatable movement with reduced friction, making it well-suited for industries such as CNC machining, robotics, 3D printing, and medical devices. The high load capacity, smooth motion, and easy integration make it a versatile solution for a wide range of motion control applications.

 

Advantages of Captive Linear Stepper Motors

The captive linear stepper motor offers several advantages, particularly in applications that require high precision, reliability, and control. Some of the key benefits include:

1. High Precision and Accuracy

2. Minimal Backlash

3. Reliable and Smooth Motion

4. High Load Capacity

5. Easy Integration

 

Applications of Captive Linear Stepper Motors

Captive linear stepper motors are ideal for applications that require precise control, smooth motion, and reliable performance. Below are some common industries and uses for these motors:

1. CNC Machines

2. 3D Printing

3. Robotics

4. Medical Equipment

5. Automated Manufacturing Systems

6. Laboratory Equipment

FAQs of Customized Captive Linear Stepper Motor

1. What is a linear Stepper Motor and how does a captive linear stepper motor differ from other types?

A linear Stepper Motor converts electrical pulses into precise linear motion and a captive linear stepper motor has an integrated nut captured in a housing preventing free rotation to deliver smooth accurate linear travel.

 

2. What are the main advantages of using a captive linear stepper motor in motion systems?

Captive linear Stepper Motors provide high precision and accuracy, minimal backlash, smooth motion, high load capacity and easy integration into automation systems.

 

3. Why should I choose a captive linear stepper motor for CNC or robotics applications?

Because the captive design ensures repeatable linear movement with reduced backlash and reliable performance essential for CNC, robotics and precision automation tools.

 

4. What NEMA sizes of captive linear stepper motors are available from Besfoc?

Besfoc offers captive linear Stepper Motors in common sizes including NEMA8, NEMA11, NEMA17 and NEMA23 with options of various body lengths, leads and strokes.

 

5. How does the captive linear stepper motor design reduce backlash?

The integrated nut is held in place within the housing, preventing free rotation and eliminating the slack that often causes backlash in other linear systems.

 

6. What customization options are available through OEM ODM Customized services for linear Stepper Motors?

OEM ODM Customized options include custom body length, screw lead, stroke distance, nut material, connectors, mounting features, and optional feedback components.

 

7. Can Besfoc customize the screw lead and travel stroke for a captive linear stepper motor?

Yes Besfoc’s OEM ODM Customized services allow customers to specify the screw lead and stroke length based on the application requirements.

 

8. Are encoders available for captive linear Stepper Motor customization?

Yes optional encoders and feedback devices can be integrated with captive linear Stepper Motors to support closed-loop control and higher accuracy.

 

9. How does Besfoc ensure high performance and durability in captive linear stepper motors?

Besfoc uses self-lubricating polymer nuts and optimized mechanical designs to provide long-life operation with low noise, high efficiency and minimal maintenance.

 

10. Can OEM ODM Customized captive linear stepper motors include special shaft or mounting features?

Yes customers can request special shaft types, mounting holes, brackets and other mechanical adaptations through Besfoc customization services.

 

11. What industries benefit most from captive linear stepper motor technology?

Industries such as CNC machining, 3D printing, robotics, medical equipment, laboratory automation and semiconductor handling benefit from this precise motion control.

 

12. How does a captive linear stepper motor compare to non-captive and external linear types?

The captive type fixes the nut in place for consistent guided motion, while non-captive allows freer motion and external types move the lead screw itself for different mechanical designs.

 

13. What technical parameters can be tailored in a customized linear Stepper Motor?

Customizable technical details include phase number, step angle, current rating, holding force, leadscrew features and environmental protections.

 

14. Can Besfoc captive linear stepper motors be produced with alternative nut materials?

Yes OEM ODM Customized services can adjust nut materials for reduced friction, greater durability or specific load capabilities.

 

15. Do Besfoc captive linear Stepper Motors offer low noise and smooth motion?

Yes these motors are designed for smooth linear travel with reduced vibration and low noise suited for precision environment tasks.

 

16. Are connectors and lead wires customizable on captive linear stepper motors?

Yes custom wiring options, connectors, cable lengths and terminations can be specified in OEM ODM Customized designs.

 

17. How does a captive linear stepper motor handle high load applications?

The integration of the nut and screw with reinforced design supports high axial load handling while maintaining linear accuracy.

 

18. What quality and reliability standards do Besfoc captive linear Stepper Motors meet?

Besfoc follows quality manufacturing practices ensuring reliable, long-life linear Stepper Motors suitable for industrial use.

 

19. How does OEM ODM Customized service improve the selection of linear Stepper Motors for products?

OEM ODM Customized service lets customers tailor motors to match exact machine dimensions, motion requirements and operational environments for optimal fit.

 

20. Can Besfoc provide technical support for integrating captive linear stepper motors into existing systems?

Yes Besfoc offers technical assistance including system integration, wiring support and customized design guidance to help customers achieve precise motion control.

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