Four-phase stepper motor 57BHH82-400A-21BG

hybrid stepperNEMA 23for industrial applications

Product Overview
The 57BHH82-400A-21BG is a 57mm (NEMA 23) 4-phase hybrid stepper motor delivering 2.158 N·m (22 kg·cm) of holding torque in an 82mm body. With a rated current of 4 A/Phase, it provides precise and stable performance for industrial motion control applications. Recommended driver: CWD556.

Key Highlights

• 4-Phase 1.8° — 22 kg·cm holding torque
• 4 A/Phase — 57mm (NEMA 23) frame
• 82mm body length, 8mm shaft

Electrical Specifications
Step Angle — 1.8° ± 5%
Holding Torque — 2.158 N·m (22 kg·cm)
Rated Current — 4 A/Phase
No. of Phases — 4
No. of Leads — 8
Shaft Diameter — 8mm
Frame Size — 57mm (NEMA 23)
Body Length — 82mm
Weight — 1.42 kg
Recommended Driver — CWD556

Mechanical & Performance
Mechanical drawing and torque-speed curve are provided for the 57BH/57BHH series (body and shaft dimensions: 82mm body length, 8mm shaft) to support integration and selection for your application.

Technical specifications

• Model: 57BHH82-400A-21BG
• Series: 57BHH / 57BH (57mm / NEMA 23)
• Step Angle: 1.8° ± 5%
• Holding Torque: 2.158 N·m (22 kg·cm)
• Rated Current: 4 A/Phase
• Number of Phases: 4
• Number of Leads: 8
• Shaft Diameter: 8 mm
• Frame Size: 57 mm (NEMA 23)
• Body Length: 82 mm
• Weight: 1.42 kg
• Recommended Driver: CWD556