NEMA 17 Linear Motor with Lead Screw – High Precision 0.42Nm Linear Stepper Motor

This compact and efficient linear motor integrates a NEMA 17 stepper motor with a precision-machined Tr8×8 lead screw, making it a reliable solution for linear drive applications. As a widely used lead screw stepper motor, it offers excellent thrust, smooth motion, and repeatable positioning for automation equipment, CNC devices, and laboratory instruments.

Compared to external coupler systems, this linear stepper motor eliminates alignment issues and provides a fully integrated lead screw actuator design, ideal for compact engineering environments. Whether you call it a “lead screw stepper,” “linear drive motor,” or simply a “linear motor,” the functionality remains consistent: converting rotational motion into precise, controlled linear displacement.

Key Features

• 0.42 Nm (59.48 oz.in) holding torque
• Integrated Tr8×8 lead screw for direct linear motion
• 2-phase, 4-wire stepper motor with stable performance
• High repeatability and long service life
• Ideal for automation, XY systems, pick-and-place, 3D printers, and medical devices

Technical Parameters

Item	Value
Step Angle	1.8° ±5%
Number of Phases	2
Rated Voltage	2.2 VDC
Phase Current	2.0 A
Phase Resistance	1.1 Ω ±10%
Phase Inductance	2.6 mH ±20%
Static Torque	0.42 N·m
Insulation Class	Class B
Insulation Resistance	100MΩ min (500V DC)
Ambient Temperature	-20°C ~ +50°C
Ambient Humidity	15% ~ 95%
Motor Weight	Approx. 0.3 kg
Recommended Driver	2D4020A

Lead Screw Specifications

Lead Screw Item	Value
Type	Tr8 × 8 (4-start, 8mm lead)
Lead Screw Length	100 mm
Nut Type	Standard brass nut

Motor Dimensions

Dimension Item	Value
Motor Body Length	40 mm
Flange Size	42 mm
Mounting Hole Distance	31 ± 0.1 mm
Shaft/Lead Screw Diameter	φ 8 mm
Connector	PH-6Y 2.0mm 6-Pin

Wiring Information (PH-6Y Connector)

Pin No.	Color	Function
1	Black	A+
3	Red	A–
4	Green	B+
6	Blue	B–

Excitation Sequence & Direction (Clockwise)

Step	A+	B+	A–	B–
1	+	+	–	–
2	–	+	+	–
3	–	–	+	+
4	+	–	–	+

FAQ

Ball screw vs lead screw – what is the difference?

Ball screws use recirculating balls for extremely high efficiency and very low friction, ideal for high-end CNC or heavy-load precision systems.
Lead screws rely on sliding contact and are quieter, cheaper, and excellent for compact linear stepper motor actuators.

Ball and screw linear actuator?

Both convert rotary motion to linear displacement. Ball screw actuators offer higher efficiency, while lead screw actuators (like this one) provide better self-locking and simpler mechanical design.

Why do some people call it a “screw stepper motor” and others call it a “linear motor”?

They refer to the same concept: a stepper motor with an integrated lead screw.
“Linear motor” highlights the motion output, while “lead screw stepper motor” highlights its mechanism.
Both belong to the family of linear drive motors and perform the same function.

Download Datasheet

Download the full specification sheet for detailed parameters, wiring guide, and performance curves.

📄 Download PDF Datasheet