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External Lead Screw Linear Actuators

HOLRY  External Lead Screw Linear Actuators Types


External lead screw linear actuators integrate a stepper motor with an external threaded lead screw and nut assembly, converting rotational motion into precise linear motion while keeping the screw exposed for compact designs and easy integration. This configuration excels in applications requiring high accuracy and moderate loads, such as CNC machines, 3D printers, and robotic positioning systems.


At HOLRY Motor, our core products include external lead screw linear actuators, available in 2-phase configurations. We offer step angles of 1.8°, along with motor sizes that include NEMA 8, 11, 14, 17, 23, 24, 34, and 42.


NEMA 8 Stepper Motor Lead Screw Linear Actuator

NEMA8 (20mm) External 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 Rated Current
(A)
Phase Resistance(Ω) Weight
(g)
Lead Wire
(No.)
Motor Length
 (mm)
20HSG28 0.5 5.3 52 4 28
20HSG38 0.5 8.8 75 38
 
 
Screw Diameter
(mm)
Screw Lead
(mm)
Screw Starts Step Length           
 (1.8°)
3.505 0.6096 1 0.0030
1.2192 1 0.0061
2.0000  2 0.0100 
4.0000  4 0.0200
8.0000  8 0.0400
 
 

NEMA 11 Stepper Motor Lead Screw Linear Actuator

NEMA11 (28mm) External 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 Rated Current
(A)
Phase Resistance(Ω) Weight
(g)
Lead Wire
(No.)
Motor Length
 (mm)
28HSG33 0.5 9.1 120 4 33
28HSG33 1.0  2.1
28HSG44 1.0  4.1 178 4 44
28HSG51 1.0  1.5 195 51
 
 
Screw Diameter
(mm)
Screw Lead
(mm)
Screw Starts Step Length           
 (1.8°)
3.505 0.6350  1 0.0030
1.2700 1 0.0064
2.5400 2 0.0127
5.0800 8 0.0254
10.1600 10.1600  0.0508
5 2 1 0.0100
5.6 4.8768  4  
 
 

NEMA 14 Stepper Motor Lead Screw Linear Actuator

NEMA14 (35mm) External 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 Rated Current
(A)
Phase Resistance(Ω) Weight
(g)
Lead Wire
(No.)
Motor Length
 (mm)
35HSG33 0.5 13.2 190 4 33.5
35HSG33 1.0  3.5
35HSG33 1.5  1.8
35HSG45 0.5  24 240 45
35HSG45 1.0  6
35HSG45 1.5 2.7
 
 
Screw Diameter
(mm)
Screw Lead
(mm)
Screw Starts Step Length
(1.8°)
Step Length
(0.9°
6.35 0.6096  1 0.0030  0.0015 
1.2700  1 0.0064  0.0032 
1.5875  1 0.0079  0.0040 
2.4384  2 0.0122  0.0061 
2.5400  2 0.0127  0.0064 
3.1750  2 0.0159  0.0079 
4.8768  4 0.0244  0.0122 
5.0800  4 0.0254  0.0127 
6.3500  4 0.0318  0.0159 
9.7536  6 0.0488  0.0244 
12.7000  8 0.0635  0.0318 
25.4000  8 0.1270  0.0635 
8.0 1.5000  1 0.0075  0.0038 
2.0000  1 0.0100  0.0050 
4.0000  2 0.0200  0.0100 
8.0000  4 0.0400  0.0200 
12.0000  6 0.0600  0.0300 
15.0000  6 0.0750  0.0375 
20.0000  8 0.1000  0.0500 

 

NEMA 17 Stepper Motor Lead Screw Linear Actuator

NEMA17 (42mm) External 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 Rated Current
(A)
Phase Resistance(Ω) Weight
(g)
Lead Wire
(No.)
Motor Length
 (mm)
42HSG34 0.5 12 255 4 34
42HSG34 1.0  3.8
42HSG40 0.5  1.9 388 4 40
42HSG40 1.5  22
42HSG48 1.7  1.7 310 48
42HSG60 2.0  0.9 360 60
 
 
Screw Diameter
(mm)
Screw Lead
(mm)
Screw Starts Step Length
(1.8°)
Step Length
(0.9°
6.35 0.6096  1 0.0030  0.0015 
1.2700  1 0.0064  0.0032 
1.5875  1 0.0079  0.0040 
2.4384  2 0.0122  0.0061 
2.5400  2 0.0127  0.0064 
3.1750  2 0.0159  0.0079 
4.8768  4 0.0244  0.0122 
5.0800  4 0.0254  0.0127 
6.3500  4 0.0318  0.0159 
9.7536  6 0.0488  0.0244 
12.7000  8 0.0635  0.0318 
25.4000  8 0.1270  0.0635 
8.0 1.5000  1 0.0075  0.0038 
2.0000  1 0.0100  0.0050 
4.0000  2 0.0200  0.0100 
8.0000  4 0.0400  0.0200 
12.0000  6 0.0600  0.0300 
15.0000  6 0.0750  0.0375 
20.0000  8 0.1000  0.0500 

 

NEMA 23 Stepper Motor Lead Screw Linear Actuator

NEMA23 (57mm) External 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 Rated Current
(A)
Phase Resistance(Ω) Weight
(g)
Lead Wire
(No.)
Motor Length
 (mm)
57HSG45 1 6.4 0.8 4 45
57HSG45 2.0  1.2
57HSG45 3.0  0.9
57HSG65 3.0  1.2 1.2 65
57HSG65 4.0  0.7
  1.5 2.7
 
 
Screw Diameter
(mm)
Screw Lead
(mm)
Screw Starts Step Length           
 (1.8°)
Step Length
(0.9°)
9.525 1.27 1 0.0064  0.0032 
2.54 1 0.0127  0.0064 
3.175 1 0.0159  0.0079 
5.08 4 0.0254  0.0127 
6.35 4 0.0318  0.0159 
9.525 4 0.0476  0.0238 
10.16 8 0.0508  0.0254 
12.7 4 0.0635  0.0318 
25.4 8 0.1270  0.0635 
10 2 1 0.0100  0.0050 
4 2 0.0200 0.0100
 
 

NEMA 24 Stepper Motor Lead Screw Linear Actuator

Stepper motor, high torque, low noise, smooth type, step angle: 1.8° NEMA24, 60x60mm
Optional: Lead-wires, gearbox, encoder, brake, integrated drivers...
MODEL Rated Current
(A)
Phase Resistance  (Ω) Weight
(Kg)
Lead Wire
(No.)
Motor Length(mm)
60HSG47 2.0  1.5 1 4 47
60HSG47 3.0  0.6
60HSG67 3.0  1.2 1.5 67
60HSG67 4.0  0.6
 
 
 
Screw Diameter
(mm)
Screw Lead
(mm)
Screw Starts Step Length           
 (1.8°)
Step Length
(0.9°)
9.525 1.27 1 0.0064  0.0032 
2.54 1 0.0127  0.0064 
3.175 1 0.0159  0.0079 
5.08 4 0.0254  0.0127 
6.35 4 0.0318  0.0159 
9.525 4 0.0476  0.0238 
10.16 8 0.0508  0.0254 
12.7 4 0.0635  0.0318 
25.4 8 0.1270  0.0635 
10 2 1 0.0100  0.0050 
4 2 0.0200 0.0100
 
 

NEMA 34 Stepper Motor Lead Screw Linear Actuator

NEMA 34 Stepper Motor Lead Screw Linear Actuator is designed for high-performance applications requiring precise linear motion, robust torque, and rapid acceleration. Featuring a NEMA 34 (86x86mm) frame size, this actuator integrates a low rotor inertia stepper motor, optimized for delivering large torque and fast acceleration. Available in 2-phase (1.8° step angle) or 3-phase (1.2° step angle) configurations, it ensures smooth and accurate positioning for demanding industrial tasks.
MODEL Rated Current
(A)
Phase Resistance(Ω) Weight
(g)
Lead Wire
(No.)
Motor Length
 (mm)
86HSG75 5 0.75 2.5 4 75
86HSG98 5 0.6 3.5 98
86HSG1180 6 0.6 5 4 118
86HSG156 6 0.7 6 156
 
 
Screw Diameter
(mm)
Screw Lead
(mm)
Screw Starts Step Length
(1.8°)
  2.5400  1 0.0127
3.1750  1 0.0159 
5.0800  2 0.0254 
6.3500  2 0.0318 
12.7000  4 0.0635 
25.4000  8 0.1270 

How to Choose the Right External Lead Screw Linear Actuator

  • Assess Load and Speed: Calculate the required thrust and lead pitch to ensure motor torque compatibility.
  • Consider Environmental Factors: Select IP ratings and coatings to resist dust or corrosion.
  • Test Integration: Obtain samples from suppliers like Thomson or Haydon Kerk to verify compatibility with existing systems.

External lead screw linear actuator revolutionizes linear motion solutions with its simple, efficient design.If you need customized specifications or further technical details, contact HOLRY Motor professional manufacturers.Optimize your automation projects by choosing the right external lead screw linear actuator today!

Applications of External Lead Screw Linear Actuators

These actuators are widely used in fields requiring reliable linear motion:

Industrial Automation: CNC machines and pick-and-place systems, providing precise Z-axis movement.
Medical and Laboratory Equipment: Syringe pumps or microscope stages, ensuring quiet, high-precision operation.
Robotics and 3D Printing: Driving arm joints or print heads, supporting rapid prototyping.
Packaging Machinery: Synchronizing multi-axis motion to enhance production efficiency.

Key Features of External Lead Screw Linear Actuators

Rotational Screw Mechanism: The motor drives the lead screw to rotate, and the load achieves linear motion via a nut or external guiding system. This open architecture is ideal for systems with existing guide rails, reducing the need for additional components.
High Precision and Low Backlash: Utilizing precision-rolled stainless steel screws (e.g., 300 series with PTFE coating) paired with anti-backlash nuts (e.g., constant-force spring designs), backlash can be reduced by 2-4 times, ensuring micron-level repeatability.
Compact Size and High Load Capacity: Available in sizes from NEMA 14 (14mm square frame) to NEMA 34 (86mm), with thrust capacities ranging from 40-2200N, supporting fast acceleration and durable operation.
Material and Durability: Engineering plastic nuts (e.g., Delrin) provide quiet, low-friction operation, suitable for clean environments; optional encoder feedback enables closed-loop control.

HOLRY is your professional Supplier of External Lead Screw Linear Actuator

HOLRY screw linear actuator for sale, As screw linear actuator Manufacturer & Supplier ,Factory Direct Sales. At present, they are mainly exported to more than 60 countries such as USA, Italy, Germany, Brazil, Russia, Pakistan, etc.
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