Precision Motion Product

NEMA 6 External-Nut Lead Screw Stepper Motor Linear Actuator

High-precision NEMA 6 External-Nut Lead Screw Stepper Motor Linear Actuator. Compact 14mm frame size engineered for ultra-miniature linear positioning in syringe pumps and lab automation. Custom lead options available. The NEMA 6 External-Nut Lead Screw Stepper...

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Technical Information

Product Details

High-precision NEMA 6 External-Nut Lead Screw Stepper Motor Linear Actuator. Compact 14mm frame size engineered for ultra-miniature linear positioning in syringe pumps and lab automation. Custom lead options available.

The NEMA 6 External-Nut Lead Screw Stepper Motor Linear Actuator is an ultra-compact linear actuator engineered for high-precision applications where space is severely constrained. Featuring an integrated precision ACME lead screw attached directly to the motor rotor, this 14mm hybrid stepper linear actuator eliminates mechanical couplings, reducing overall system backlash, dynamic runout, and assembly time.

Combined with a customizable external anti-backlash nut, this External-Nut linear stepper motor delivers smooth, repeatable linear motion ideal for micro-fluidic control, miniaturized medical devices, and optical positioning platforms.

Key Features & Advantages

Ultra-Compact Design: NEMA 6 frame size (14mm x 14mm) provides reliable thrust output in a micro-sized footprint.
Precision ACME Lead Screw: High-grade SUS304 stainless steel lead screw with multiple pitch and lead options for optimal speed and resolution.
Reduced Backlash & High Repeatability: Direct-drive integration eliminates shaft coupling play for precision positioning accuracy.
Versatile Nut Materials: Available with standard bronze nuts, self-lubricating POM nuts, or spring-loaded anti-backlash nuts.

Technical Specifications

Feature / Parameter	Standard Specification
Frame Size	NEMA 6 (14mm x 14mm)
Motor Type	Hybrid Stepper Linear Actuator
Actuator Style	External-Nut (External Traveling Nut)
Step Angle	1.8° (200 steps/rev)
Screw Diameter	Tr2mm / Tr3mm / Tr4mm
Lead / Pitch Range	0.5mm, 1.0mm, 2.0mm per revolution
Max Thrust Force	15 N to 35 N
Rated Current	0.2A - 0.5A per phase
Resistance / Inductance	10 Ω / 4.5 mH per phase
Nut Material Options	POM (Polyoxymethylene), Bronze, Anti-Backlash Plastic
Standard Screw Length	50mm, 75mm, 100mm (Customizable up to 150mm)

Typical Applications

Portable Medical Syringe Pumps & Micro-Fluidic Dispensers
Miniature Optical & Laser Alignment Mechanisms
Micro-positioning Stages & Lab-on-a-Chip Automation Equipment

Engineering resources

Parameters, Drawings & Performance Data

Use order-specific technical documents for final selection. Published information should be checked against the required operating conditions and mechanical interface.

Technical parameters, drawings and performance data are confirmed against the selected model and operating conditions.

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Information Needed for Model Selection

Application and motion type
Load or required thrust / torque
Speed, travel and acceleration
Accuracy and repeatability target
Duty cycle and operating environment
Installation space and interface drawing
Controller, drive and feedback requirements
Quantity, destination and required documents

Verified series range

Product Family Overview

The values below describe the available family range from Thinker Motion's supplied technical files. Confirm the exact model parameters and drawing before ordering.

Family size range14–86 mm

Step angle1.8°

ConfigurationsCaptive / External / Non-captive

Lead wires4

Available sizes depend on configuration. The supplied range includes 14, 20, 28, 35, 42, 57, 60 and 86 mm products. Screw length and screw-end machining can be specified for applicable models.

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