NEMA 17 Integrated Stepper Motor with Closed Loop Stepper Controller and Gearbox

This high-performance integrated stepper motor closed loop stepper controller combines a
42mm closed loop stepper motor, high-precision encoder, compact driver module, and a planetary gearbox in a single integrated structure. The closed loop design ensures high accuracy, reduced noise, lower vibration, automatic position correction, and superior efficiency compared with traditional open-loop motors.

Key Features

• Closed-loop control with high-resolution encoder feedback
• Built-in closed loop stepper driver for simplified wiring
• Integrated servo motor performance with stepper motor efficiency
• Planetary gearbox section: 43 mm length
• Output shaft length: 11 mm
• Rated torque: 0.43 Nm

Application Areas

• Robotics and smart automation
• CNC equipment, carving machines, and precision motion devices
• Medical devices and laboratory automation
• AGV, AMR, conveyor systems, and compact servo-stepper applications

Technical Parameters

Item	Value
Step Angle	1.8° ± 5%
Number of Phase	2
Phase Voltage	2.8 VDC
Phase Current	2.0 A
Phase Resistance	1.4 Ω ±10%
Phase Inductance	3.0 mH ±20%
Static Torque	0.43 Nm
Insulation Class	Class B
Insulation Resistance	100MΩ min. (500V DC)
Ambient Temperature	−20°C ~ +50°C
Ambient Humidity	15% ~ 95%
Motor Weight	Approx. 0.4 kg
Operating Voltage	DC 24–36V

Gearbox Specification

Reducer Level	Exact Reduction Ratio	Rated Load (Nm)	Reducer Length (mm)
Level 1	3 / 4 / 5 / 10	10 / 9 / 10 / 6	43
Level 2	15 / 16 / 20 / 25 / 30 / 40 / 50 / 100	10 / 9 / 9 / 9 / 9 / 9 / 8 / 7 / 6	53.5

Dimension Drawing

Reference drawing:

(Based on uploaded file: /mnt/data/42EC48-YT-HG5.png)

Dimension Item	Value
Motor Body Length	48 mm
Gearbox Length	43 mm
Shaft Diameter	Φ8 mm
Shaft Length	11 mm
Mounting Hole	4 × M3
Flange Size	42 × 42 mm

FAQ

1. Open loop vs closed loop?

Open-loop stepper motors run without feedback. Closed-loop motors use an encoder to monitor position
and automatically correct errors, providing higher torque, better reliability, and servo-like performance.

2. Closed loop vs open loop control?

Closed-loop control adjusts current and position in real time, preventing lost steps, overheating,
and improving acceleration. Open-loop control outputs fixed current and may lose position under load.

3. Integrated stepper vs external driver?

An integrated stepper motor includes a built-in closed loop stepper driver, encoder, and motor in one unit,
reducing wiring complexity and improving EMC stability.

Download Datasheet

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

📄 Download PDF Datasheet