Hybrid stepper motor 57BHP56-350A-21A

3-phaseNEMA 23

Product Overview
The 57BHP56-350A-21A is a 57mm (NEMA 23) 3-phase hybrid stepper motor providing 0.883 N·m (9 kg·cm) holding torque in a compact 56 mm body. Rated at 3.5 A/phase and equipped with a 6.35 mm shaft, it is suitable for precision motion control applications. Recommended driver: CW542.

Key Highlights

• 3-phase, 1.2° step angle — 0.883 N·m (9 kg·cm) holding torque
• Rated current 3.5 A/phase — 57 mm (NEMA 23) frame
• 56 mm body length — 6.35 mm shaft diameter

Electrical Specifications
Step angle : 1.2° ± 5%
Holding torque : 0.883 N·m (9 kg·cm)
Rated current : 3.5 A/Phase
No. of phases : 3
No. of leads : 6
Shaft diameter : 6.35 mm
Frame size : 57 mm (NEMA 23)
Body length : 56 mm
Weight : 0.65 kg
Recommended driver : CW542

Mechanical & Performance Illustrations
Mechanical drawing and torque‑speed curve for the 57BH series are provided to assist mechanical integration and performance evaluation.

Technical specifications

• Model designation (variant): 57BHP56-350A-21A
• Series: 57BH / 57BHP
• Frame size: 57 mm (NEMA 23)
• Body length: 56 mm
• Number of phases: 3
• Step angle: 1.2° ± 5%
• Holding torque: 0.883 N·m (9 kg·cm)
• Rated current: 3.5 A/Phase
• Number of leads: 6
• Shaft diameter: 6.35 mm
• Weight: 0.65 kg
• Recommended driver: CW542