NEMA 17 0.9° Stepper Motor and Encoder – Closed-Loop Stepper Motor with 1000-Line Shaft Encoder

This advanced stepper motor and encoder assembly integrates a high-accuracy 1000-line optical motor shaft encoder into a compact 42mm (NEMA 17) stepper motor. It provides precise closed-loop control, reduced step loss, faster response, and higher stability than traditional open-loop systems.

Available in multiple body lengths – 34mm, 40mm, 48mm, and 60mm – this stepper motor with encoder is ideal for CNC machines, robotics, 3D printers, medical equipment, and automation systems that require reliable positioning and feedback.

Key Features

• High-resolution 1000-line motor encoder for accurate feedback
• Improved torque efficiency and real-time correction
• Standard nema17 motor dimensions for universal compatibility
• 2-phase 4-wire motor structure with stable performance
• Supports closed-loop stepper drivers for servo-like motion control

Motor Technical Specifications

Item	Specification
Step Angle	0.9° ±5%
Number of Phases	2
Rated Voltage	2.8 VDC
Phase Current	2.0 A
Phase Resistance	1.4 Ω ±10% (20°C)
Phase Inductance	3.0 mH ±20%
Holding Torque (48mm body)	Approx. 0.44 Nm
Insulation Class	Class B
Insulation Resistance	100MΩ min. (500V DC)
Ambient Temperature	-20°C ~ +50°C
Ambient Humidity	15% to 95%
Motor Weight	Approx. 0.5 kg
Recommended Driver	2D42BH Closed-loop Stepper Driver

Available Body Length Options

Model	Body Length	Notes
Type A	34 mm	Compact installation
Type B	40 mm	Standard torque
Type C	48 mm	Higher torque
Type D	60 mm	Heavy-duty applications

Dimensions (NEMA17 Motor Dimensions)

Parameter	Value
Motor Frame Size	42 × 42 mm
Shaft Diameter	Φ5 mm
Shaft Length	24 ±1 mm
Mounting Hole Spacing	31 ±0.15 mm
Mounting Hole Type	M3

Encoder Specifications (Motor Encoder)

Item	Value
Encoder Type	Optical Encoder
Resolution	1000 Lines
Power Supply	+5V (RED)
Ground	GND (WHT)
Encoder A+	BLK
Encoder A−	BLU
Encoder B+	YEL
Encoder B−	GRN

Wiring – Motor and Encoder

Wire Color	Function
BLK	Motor A+
RED	Motor A−
GRN	Motor B+
BLU	Motor B−

This closed-loop stepper motor and encoder solution provides superior accuracy, torque efficiency, and reliability for next-generation automation and motion control projects.

Download Datasheet

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

📄 Download PDF Datasheet

If you want it add the gearbox,please check this one: NEMA 17 Closed-Loop Stepper Motor with High-Precision Speed Reducer Gearbox & Encoder – 0.9° Hybrid Planetary Gear Motor