Two-phase stepper motor 57BH56-200-21

hybrid stepperNEMA 23

Product Overview
The 57BH56-200-21 is a 57mm (NEMA 23) 2-phase hybrid stepper motor delivering 0.706 N·m (7.2 kg·cm) of holding torque in a 56 mm body. Rated 2 A/phase, it is intended for precision motion control applications. Recommended driver: CW542.

Key Highlights

• 2-phase, 1.8° step angle — 0.706 N·m (7.2 kg·cm) holding torque
• Rated current: 2 A/phase — 57 mm (NEMA 23) frame
• Body length: 56 mm — shaft diameter: 6.35 mm

Electrical & Mechanical Specification Table
Step Angle — 1.8° ± 5%
Holding Torque — 0.706 N·m (7.2 kg·cm)
Rated Current — 2 A/Phase
No. of Phases — 2
No. of Leads — 4
Shaft Diameter — 6.35 mm
Frame Size — 57 mm (NEMA 23)
Body Length — 56 mm
Weight — 0.65 kg
Recommended Driver — CW542

Mechanical & Performance Images
Mechanical drawing and torque–speed curve for the 57BH series are available on the product page (see image resources).

Technical specifications

• Model example: 57BH56-200-21 (series: 57BH Series)
• Phase: 2
• Step Angle: 1.8° ± 5%
• Holding Torque: 0.706 N·m (7.2 kg·cm)
• Rated Current: 2 A/Phase
• No. of Leads: 4
• Shaft Diameter: 6.35 mm
• Frame Size: 57 mm (NEMA 23)
• Body Length: 56 mm
• Weight: 0.65 kg
• Recommended Driver: CW542