Two-phase stepper motor 57BH76-120A-21B

hybrid stepperNEMA 23

Overview
The 57BH76-120A-21B is a 57mm (NEMA 23) 2-phase hybrid stepper motor delivering 1.177 N·m (12 kg·cm) of holding torque in a 76mm body. With 1.2 A/phase rated current and 4-lead wiring, it is designed for precise open-loop motion control in industrial automation, CNC and robotics. Recommended driver: CW542.

Key Highlights

• Step angle: 1.8° ±5%
• Holding torque: 1.177 N·m (12 kg·cm)
• Rated current: 1.2 A/phase, 4-lead wiring
• 57mm (NEMA 23) frame, 76mm body length, 6.35mm shaft
• Weight: 0.8 kg

Electrical specifications

• Step angle: 1.8° ±5%
• Rated current: 1.2 A/phase
• Number of phases: 2
• Number of leads: 4
• Recommended driver: CW542

Mechanical / Drawings
Mechanical drawing and torque-speed curve for the 57BH series are provided to assist with mounting, integration and performance evaluation.

Applications

• Precision positioning in automation and CNC
• Robotics and pick-and-place systems
• Laboratory and medical equipment (where applicable)

Ordering information
Model: 57BH76-120A-21B. Contact sales for customization, lead times and driver matching.