NEMA23 Brushless DC Motor 57BL70 24V 134W 4500RPM

The NEMA23 Brushless DC Motor 57BL70 is designed for high-efficiency, reliable operation in industrial and automation systems. This brushless electric motor provides smooth rotation, low noise, and long service life. With 0.37Nm rated torque and a compact 57mm frame, it is suitable for robotics, CNC equipment, and precision motion control applications.

Key Features

• Rated voltage: 24V DC, rated power: 134W
• Rated speed: 4500RPM, no-load speed: 3500RPM
• Rated torque: 0.37Nm
• Rated current: 9.0A, insulation class B
• Compatible with professional brushless DC motor driver
• Low noise, high efficiency, and maintenance-free operation

Technical Specifications

Parameter	Specification
Number of Phases	3
Number of Poles	4
Rated Voltage	24 VDC
Rated Speed	4500 ±10% RPM
No Load Speed	3500 ±10% RPM
Rated Current (Max.)	9.0 A
Rated Power	134 W
Rated Torque	0.37 N.m
Insulation Resistance	100MΩ min (500V DC)
Ambient Temperature	-20°C ~ +50°C
Ambient Humidity	15% ~ 95%
Motor Weight	Approx. 0.7 Kg
Insulation Class	B

Electrical Connection Table

Wire	Phase/Signal	Description
Orange (ORG)	U	Motor Phase U
Green (GRN)	V	Motor Phase V
Brown (BRW)	W	Motor Phase W
Red (RED)	+5V	Hall sensor power
Yellow (YEL)	A	Hall sensor signal U
White (WHT)	B	Hall sensor signal V
Blue (BLU)	C	Hall sensor signal W
Black (BLK)	GND	Ground

Applications

• Industrial automation and CNC machinery
• Robotics and AGV systems
• Precision positioning equipment
• 3D printing and laboratory instruments
• High-efficiency motion control systems

FAQ

How does a brushless motor work?

A brushless DC motor uses electronic commutation instead of brushes. Hall sensors detect rotor position, and the controller switches current through stator windings to create a rotating magnetic field that drives the rotor smoothly.

Brushless DC motor vs brushed DC motor

BLDC motors offer higher efficiency, lower maintenance, quieter operation, and longer life than brushed motors, which rely on mechanical commutation and brushes.

Brushless DC motor and controller

The brushless DC motor driver or controller manages phase energization, speed, and torque to maintain accurate rotation and positioning.

Brushless motor speed controller

A brushless motor speed controller adjusts voltage and commutation sequence to control motor RPM and torque for stable operation in automation applications.

Download Datasheet

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

📄 Download PDF Datasheet