External T-type Linear Stepper Motor

What Is External T-type Linear Stepper Motor?

A Linear Stepper Motor is a type of electric motor that converts electrical pulses into linear motion. Unlike rotary motors, which produce rotational movement, a linear stepper motor produces direct linear motion along a straight path. The External T-type Lead Screw mechanism is a critical component that allows the motor to achieve high precision and force transmission in linear motion systems.
The T-type lead screw refers to the lead screw with a unique external thread configuration, typically used to convert rotary motion into linear motion. It is called "external" because the threads are located on the outside of the screw shaft, which improves load-bearing capacity and reduces backlash. The combination of a stepper motor and a lead screw system makes the External T-type Lead Screw Linear Stepper Motor an excellent choice for applications requiring high precision, reliability, and repeatability.

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.

NEMA 8 External T-type Linear Stepper Motor

NEMA8 (20mm) External T-type Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The base size is 20mm, and the body length is available in 30mm and 38mm.

Optional: Connectors, integrated drivers...

Model

Step Angle

Phase

Shaft Type

Wires

Body Length

Current

Resistance

Inductance

Holding Torque

Leads No.

Rotor Inertia

Weight

(°)

(L) mm

N.cm

No.

g.cm²

BF20HST30-0604

1.8

T-type Screw

Connector

0.6

6.5

1.7

1.8

0.05

BF20HST38-0604

1.8

T-type Screw

Connector

0.6

2.2

0.08

NEMA 11 External T-type Linear Stepper Motor

NEMA11 (28mm) External T-type Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The base size is 28mm, and the body length is available in 32mm, 45mm and 51mm.

Optional: Connectors, gearbox, encoder, integrated built-in drivers...

Model	Step Angle	Phase	Shaft Type	Wires	Body Length	Current	Resistance	Inductance	Holding Torque	Leads No.	Rotor Inertia	Weight
Model	(°)	/	/	/	(L)mm	A	Ω	mH	N.cm	No.	g.cm²	Kg
BF28HST32-0674	1.8	2	T-type Screw	Direct Wire	32	0.67	5.6	3.4	6	4	9	0.11
BF28HST45-0674	1.8	2	T-type Screw	Direct Wire	45	0.67	6.8	4.9	9.5	4	12	0.14
BF28HST51-0674	1.8	2	T-type Screw	Direct Wire	51	0.67	9.2	7.2	12	4	18	0.2

NEMA 14 External T-type Linear Stepper Motor

NEMA14 (35mm) External T-type Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The base size is 35mm, and the body length is available in 28mm, 34mm and 42mm.

Optional: Connectors, gearbox, encoder, integrated built-in drivers...

Model	Step Angle	Phase	Shaft Type	Wires	Body Length	Current	Resistance	Inductance	Holding Torque	Leads No.	Rotor Inertia	Weight
Model	(°)	/	/	/	(L)mm	A	Ω	mH	N.cm	No.	g.cm²	Kg
BF35HST28-0504	1.8	2	T-type Screw	Direct Wire	28	0.5	20	14	10	4	11	0.13
BF35HST34-1004	1.8	2	T-type Screw	Direct Wire	34	1	2.7	4.3	14	4	13	0.17
BF35HST42-1004	1.8	2	T-type Screw	Direct Wire	42	1	3.8	3.5	20	4	23	0.22

NEMA 17 External T-type Linear Stepper Motor

NEMA17 (42mm) External T-type Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The base size is 42mm, and the body length is available in 34mm, 40mm, 48mm and 60mm.

Optional: Connectors, gearbox, encoder, integrated built-in drivers...

Model	Step Angle	Phase	Shaft Type	Wires	Body Length	Current	Resistance	Inductance	Holding Torque	Leads No.	Rotor Inertia	Weight
Model	(°)	/	/	/	(L)mm	A	Ω	mH	N.cm	No.	g.cm²	Kg
BF42HST34-1334	1.8	2	T-type Screw	Direct Wire	34	1.33	2.1	2.5	26	4	34	0.22
BF42HST40-1704	1.8	2	T-type Screw	Direct Wire	40	1.7	1.5	2.3	42	4	54	0.28
BF42HST48-1684	1.8	2	T-type Screw	Direct Wire	48	1.68	1.65	2.8	44	4	68	0.35
BF42HST60-1704	1.8	2	T-type Screw	Direct Wire	60	1.7	3	6.2	7.3	4	102	0.55

NEMA 23 External T-type Linear Stepper Motor

NEMA23 (57mm) External T-type Linear Stepper Motor has the characteristics of small size, high performance, long durability, low noise and high efficiency. The base size is 57mm, and the body length is available in 41mm, 51mm, 56mm, 76mm, 82mm, 100mm, and 112mm.

Optional: Connectors, gearbox, encoder, integrated built-in drivers...

Model	Step Angle	Phase	Shaft Type	Wires	Body Length	Current	Resistance	Inductance	Holding Torque	Leads No.	Rotor Inertia	Weight
Model	(°)	/	/	/	(L)mm	A	Ω	mH	Nm	No.	g.cm²	Kg
BF57HST41-2804	1.8	2	T-type Screw	Direct Wire	41	2.8	0.7	1.4	0.55	4	150	0.47
BF57HST51-2804	1.8	2	T-type Screw	Direct Wire	51	2.8	0.83	2.2	1.01	4	230	0.59
BF57HST56-2804	1.8	2	T-type Screw	Direct Wire	56	2.8	0.9	3	1.2	4	280	0.68
BF57HST76-2804	1.8	2	T-type Screw	Direct Wire	76	2.8	1.1	3.6	1.89	4	440	1.1
BF57HST82-3004	1.8	2	T-type Screw	Direct Wire	82	3.0	1.2	4.0	2.1	4	600	1.2
BF57HST100-3004	1.8	2	T-type Screw	Direct Wire	100	3.0	0.75	3.0	3.0	4	700	1.3
BF57HST112-3004	1.8	2	T-type Screw	Direct Wire	112	3.0	1.6	7.5	3.0	4	800	1.4

Components of an External T-type Lead Screw Linear Stepper Motor

Step Motor: The core component that generates precise, step-by-step movement for accurate linear motion.
T-type Lead Screw: A specialized screw with external threading, engineered for high load capacity and minimal backlash.
Nut: A component that travels along the lead screw, converting the motor's power into linear movement.
Housing: A structural frame that secures the motor and lead screw, maintaining proper alignment.
Bearings: Components that minimize friction and ensure smooth movement along the lead screw.

How Does an External T-type Lead Screw Linear Stepper Motor Work?

The external T-type lead screw couples with the stepper motor to provide linear motion. The stepper motor moves in precise, discrete steps, turning the lead screw between 0.9 and 1.8 degrees per step. These tiny, controlled movements enable the External T-type Lead Screw Linear Stepper Motor to achieve exceptional precision.

When the motor rotates, the lead screw's threads mesh with the nut, driving it along the screw's length. The external placement of the threads provides superior strength and resistance to deformation—making this system ideal for high-load applications. Through careful design, the nut travels smoothly and consistently along the lead screw with minimal backlash, delivering both accuracy and efficiency.

Benefits of Using an External T-type Lead Screw Linear Stepper Motor

1. Precision and Accuracy

One of the key advantages of the External T-type Lead Screw Linear Stepper Motor is its high precision. The stepper motor’s ability to make precise, incremental movements translates into highly accurate positioning. This makes it ideal for applications where precision is paramount, such as in CNC machines, 3D printers, and robotics.

2. Reduced Backlash

Backlash, or the slight movement that occurs when reversing direction, can reduce the accuracy of a motion system. The External T-type Lead Screw design is specifically intended to minimize backlash. The external threads engage more securely with the nut, reducing any unwanted play and improving the system’s overall efficiency.

3. High Load Capacity

The external threads of the T-type lead screw are designed to handle higher loads than traditional lead screw designs. This makes the system ideal for use in applications that require the movement of heavy loads with high reliability, such as industrial machinery and automated systems.

4. Smooth Motion

Thanks to the combination of the stepper motor and the lead screw, these systems provide smooth, continuous motion. This ensures that the system can perform in applications where smoothness of operation is critical, such as in medical devices or high-precision manufacturing tools.

5. Cost-Effective and Low Maintenance

The External T-type Lead Screw Linear Stepper Motor is a relatively cost-effective solution compared to other forms of linear actuators. Additionally, the simple design reduces the need for frequent maintenance, making it a low-maintenance option for long-term use.

The External T-type Lead Screw Linear Stepper Motor combines precision, strength, and reliability in one powerful package. From CNC machines and 3D printers to robotics and medical devices, this technology surpasses traditional linear actuators in performance. Its ability to deliver smooth, precise, and consistent motion has made it essential in industries requiring high-quality movement systems.

Applications of External T-type Lead Screw Linear Stepper Motors

The External T-type Lead Screw Linear Stepper Motor is used across a wide range of industries and applications. Its ability to provide precise and reliable linear motion has made it a preferred choice in various sectors. Here are some notable applications:

1. CNC Machines

In the world of computer numerical control (CNC), precision is paramount. The External T-type Lead Screw Linear Stepper Motor allows CNC machines to achieve highly accurate movements, enabling them to carve and shape materials with extreme precision. The reduction of backlash and smooth motion is especially crucial in these high-precision environments.

2. 3D Printing

3D printers rely heavily on precise linear motion to build objects layer by layer. The External T-type Lead Screw Linear Stepper Motor is widely used in 3D printers to ensure that the printing head moves with exact positioning, ensuring the accuracy of each printed layer and overall object quality.

3. Robotics

In robotics, precise and controlled movement is essential for proper functionality. Whether it’s for robotic arms, servo systems, or automated assembly lines, these stepper motors allow for smooth and accurate positioning, which is critical for robotic applications that require consistent performance over extended periods.

4. Automated Linear Actuators

Linear actuators, which convert rotational motion into linear motion, often rely on lead screw systems for efficiency and durability. The External T-type Lead Screw provides the necessary strength and precision to carry out tasks such as opening and closing doors, adjusting platforms, or positioning mechanical parts in automated machinery.

5. Medical Devices

In medical applications, precision is critical for safety and accuracy. External T-type Lead Screw Linear Stepper Motors are used in medical devices like surgical robots, diagnostic equipment, and more, where highly controlled and exact linear movement is required for optimal performance.