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External Ball Screw Linear Stepper Motor

What Is the Ball Screw Stepper Motor?

An External Ball Screw Linear Stepper Motor combines two essential technologies: the ball screw and the stepper motor.

1. Ball Screw: 

A ball screw is a type of linear actuator that uses recirculating ball bearings to convert rotational motion into linear motion with high efficiency and minimal friction. Unlike traditional lead screws, which rely on sliding friction, ball screws provide rolling contact between the balls and the nut, resulting in lower friction, greater efficiency, and higher load capacity.

2. Linear Stepper Motor: 

A linear stepper motor is a type of electric motor that moves in discrete steps, producing linear motion directly. Stepper motors are ideal for applications that require precise, repeatable movement, and they are widely used in motion control systems.

When combined, these two technologies form the External Ball Screw Linear Stepper Motor, which delivers high precision, minimal backlash, and efficient linear motion. The ball screw's external threads provide superior load handling capabilities and reduce wear and tear, while the stepper motor ensures accurate, stepwise movement.

 

BesFoc Ball Screw 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.

Ball screw linear stepper motor

NEMA 11 External Ball Screw Linear Stepper Motor

NEMA11 (28mm) External Ball Screw Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. At the same time, we provide customers with a variety of motor lengths, a variety of screw leads, and a variety of screw strokes to choose from.
Optional: Connectors, gearbox, encoder, brake, integrated built-in drivers...
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
BF28HSB32-0674 1.8 2 Ball Screw Direct Wire 32 0.67 5.6 3.4 6 4 9 0.11
BF28HSB45-0674 1.8 2 Ball Screw Direct Wire 45 0.67 6.8 4.9 9.5 4 12 0.14
BF28HSB51-0674 1.8 2 Ball Screw Direct Wire 51 0.67 9.2 7.2 12 4 18 0.2
Ball screw linear stepper motor

NEMA 17 External Ball Screw Linear Stepper Motor

NEMA17 (42mm) External Ball Screw Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. At the same time, we provide customers with a variety of motor lengths, a variety of screw leads, and a variety of screw strokes to choose from.
Optional: Connectors, gearbox, encoder, brake, integrated built-in drivers...
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
BF42HSB34-1334 1.8 2 Ball Screw Direct Wire 34 1.33 2.1 2.5 26 4 34 0.22
BF42HSB40-1704 1.8 2 Ball Screw Direct Wire 40 1.7 1.5 2.3 42 4 54 0.28
BF42HSB48-1684 1.8 2 Ball Screw Direct Wire 48 1.68 1.65 2.8 44 4 68 0.35
BF42HSB60-1704 1.8 2 Ball Screw Direct Wire 60 1.7 3 6.2 7.3 4 102 0.55
Ball screw linear stepper motor

NEMA 23 External Ball Screw Linear Stepper Motor

NEMA23 (57mm) External Ball Screw Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. At the same time, we provide customers with a variety of motor lengths, a variety of screw leads, and a variety of screw strokes to choose from.
Optional: Connectors, gearbox, encoder, brake, integrated built-in drivers...
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
BF57HSB41-2804 1.8 2 Ball Screw Direct Wire 41 2.8 0.7 1.4 0.55 4 150 0.47
BF57HSB51-2804 1.8 2 Ball Screw Direct Wire 51 2.8 0.83 2.2 1.01 4 230 0.59
BF57HSB56-2804 1.8 2 Ball Screw Direct Wire 56 2.8 0.9 2.5 1.26 4 280 0.68
BF57HSB76-2804 1.8 2 Ball Screw Direct Wire 76 2.8 1.1 3.6 1.89 4 440 1.1
BF57HSB82-3004 1.8 2 Ball Screw Direct Wire 82 3.0 1.2 4.0 2.1 4 600 1.2
BF57HSB100-3004 1.8 2 Ball Screw Direct Wire 100 3.0 0.75 3.0 3.0 4 700 1.3
BF57HSB112-3004 1.8 2 Ball Screw Direct Wire 112 3.0 1.6 7.5 3.0 4 800 1.4

How Does an External Ball Screw Linear Stepper Motor Work?

The working principle of the External Ball Screw Linear Stepper Motor involves the synchronized operation of the ball screw and the stepper motor:

1. Stepper Motor Movement: 

The stepper motor receives electrical pulses from a controller, which energizes the motor coils in sequence. As the coils are energized, they generate a magnetic field that interacts with the rotor, causing it to rotate in discrete steps.

2. Ball Screw Conversion: 

The rotation of the stepper motor is transferred to the ball screw, where the nut (which houses recirculating ball bearings) moves along the threaded shaft. The ball bearings reduce friction, allowing the nut to travel smoothly and efficiently along the screw with minimal resistance.

3. Linear Motion: 

As the nut moves along the ball screw, it creates a linear motion that can be used to drive mechanical components, such as actuators, slides, or stages. The stepper motor's discrete steps ensure precise control over the distance traveled by the nut, making the system highly accurate.

4. External Ball Screw Design: 

The external ball screw design refers to the position of the ball screw threads, which are located on the outside of the nut rather than the inside. This design allows for higher load capacities and better performance under heavy-duty applications. The external threading improves the strength and durability of the system while minimizing the risk of backlash.
 

Why Choose an External Ball Screw Linear Stepper Motor?

The External Ball Screw Linear Stepper Motor is an excellent choice for applications that require precise linear motion, high load capacity, and smooth, reliable operation. By combining the efficiency and durability of the ball screw with the precision and control of the stepper motor, this system offers superior performance in a wide range of industrial, commercial, and scientific applications.

 

Advantages of External Ball Screw Linear Stepper Motors

The External Ball Screw Linear Stepper Motor offers several significant benefits that make it an attractive choice for many precision applications. These advantages include:

1. High Precision and Accuracy

2. Low Backlash and High Efficiency

3. High Load Capacity

4. Smooth and Reliable Motion

5. Durability and Low Maintenance

 

Applications of External Ball Screw Linear Stepper Motors

The External Ball Screw Linear Stepper Motor is used in a wide range of applications that demand precision, efficiency, and reliability. Some of the most common applications include:

1. CNC Machines

2. 3D Printers

3. Robotics

4. Automated Manufacturing Systems

5. Medical Devices

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